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We examined the perceived adequacy and effectiveness of BIO 0475, Advanced Human Dissection, in preparing undergraduate students for the transition into gross anatomy (or equivalent) during their first year of professional school. A 16-item, electronic survey was distributed to course graduates (n=18) that evaluated (1) the importance of BIO 0475 as it related to gross anatomy, (2) student preparedness as provided by their undergraduate training, and (3) perceived level of comfort with adapting to the increased demands of professional school. Students reported the course as beneficial to their professional studies and improving their perceived preparedness for the demands of gross anatomy at the professional level. The development of the Advanced Human Dissection course is reported as a benefit to the students as they matriculate into their professional studies.

At Kansas City University, anatomy laboratories were delivered via remote (REM) or on-campus (OC) formats due to COVID-19, creating an opportunity to evaluate student perceptions of differences in laboratory delivery format. A six-item survey of Likert scale and open-ended questions explored the utility of anatomy software, prelab instruction handouts, and prosection reviews. Likert scale validity was analyzed using Cronbach's a; responses were compared among REM and OC formats using Chi-square. Descriptive codes were applied to summarize responses, which were grouped and converted into percentages. Statistically significant differences in REM versus OC formats were determined for the helpfulness of the prelab handouts ([chi-squared], 28.00; df, 4; p < 0.001) and effectiveness of cadavers in learning anatomy ([chi-squared], 20.58; df, 4; p < 0.0004). Trends in responses noted disagreement in the effectiveness of anatomy software (REM, 69.8%; OC, 51.08%), but agreement with the helpfulness of prosection reviews (REM, 85.9%; OC, 61.6%) (Cronbach a: REM, 0.648; OC, 0.646). Themes from narrative REM comments (n = 496) noted anatomy software was difficult to use (33.1%) and had issues with orientation (15.5%), as well as a student preference for OC laboratories (12.5%). The OC format responses (n = 456) noted poor software design (47.9%), unnecessary for studying (35.4%), and preference for in-person laboratories (7.4%). Qualitative analysis of narrative comments detailed other resources used, including Complete Anatomy™ and YouTube™. Trends highlighted the prelab handouts and prosection reviews for learning, the ineffectiveness of anatomy software, and a preference for OC laboratories. We highlight student perspectives of REM versus OC laboratory formats in response to COVID-19.

Coronavirus disease-2019 (COVID-19) disrupted the in-person teaching format of anatomy. To study changes in gross anatomy education that occurred during August--December, 2020 compared to before the pandemic, an online survey was distributed to anatomy educators. The 191 responses received were analyzed in total and by academic program, geographic region, and institution type. Cadaver use decreased overall (before: 74.1 ± 34.1%, during: 50.3 ± 43.0%, P < 0.0001), as well as across allopathic and osteopathic medicine, therapy, undergraduate, and veterinary programs (P < 0.05), but remained unchanged for other programs (P > 0.05). Cadaver use decreased internationally and in the US (P < 0.0001), at public and private (P < 0.0001) institutions, and among allopathic medical programs in Northeastern, Central, and Southern (P < 0.05), but not Western, US geographical regions. Laboratories during Covid-19 were delivered through synchronous (59%), asynchronous (4%), or mixed (37%) formats (P < 0.0001) and utilized digital resources (47%), dissection (32%), and/or prosection (21%) (P < 0.0001). The practical laboratory examination persisted during COVID-19 (P = 0.419); however, the setting and materials shifted to computer-based (P < 0.0001) and image-based (P < 0.0001), respectively. In-person lecture decreased during COVID-19 (before: 88%, during: 24%, P = 0.003). When anatomy digital resources were categorized, dissection media, interactive software, and open-access content increased (P [less than or equal to] 0.008), with specific increases in BlueLink, Acland's Videos, and Complete Anatomy (P < 0.05). This study provided evidence of how gross anatomy educators continued to adapt their courses past the early stages of the pandemic.

Coronavirus disease 2019 (COVID-19) created unparalleled challenges to anatomy education. Gross anatomy education has been particularly impacted given the traditional in-person format of didactic instruction and/or laboratory component(s). To assess the changes in gross anatomy lecture and laboratory instruction, assessment, and teaching resources utilized as a result of COVID-19, a survey was distributed to gross anatomy educators through professional associations and listservs. Of the 67 survey responses received for the May-August 2020 academic period, 84% were from United States (US) institutions, while 16% were internationally based. Respondents indicated that in-person lecture decreased during COVID-19 (before: 76%, during: 8%, P < 0.001) and use of cadaver materials declined (before: 76 ± 33%, during: 34 ± 43%, P < 0.001). The use of cadaver materials in laboratories decreased during Covid-19 across academic programs, stand-alone and integrated anatomy courses, and private and public institutions (P [less than or equal to] 0.004). Before COVID-19, cadaveric materials used in laboratories were greater among professional health programs relative to medical and undergraduate programs (P [less than or equal to] 0.03) and among stand-alone relative to integrated anatomy courses (P [less than or equal to] 0.03). Furthermore, computer-based assessment increased (P < 0.001) and assessment materials changed from cadaveric material to images (P < 0.03) during COVID-19, even though assessment structure was not different (P > 0.05). The use of digital teaching resources increased during COVID-19 (P < 0.001), with reports of increased use of in-house created content, BlueLink, and Complete Anatomy software (P < 0.05). While primarily representing US institutions, this study provided evidence of how anatomy educators adapted their courses, largely through virtual mediums, and modified laboratory protocols during the initial emergence of the COVID-19 pandemic.

Pelvic organ prolapse impacts an increasing number of women in the United States. The standard approach to correcting apical pelvic organ prolapse uses the sacral anterior longitudinal ligament (SALL) to lift the vaginal apex; however, this approach may result in recurrent prolapse. A newer procedure utilizes the pectineal ligament (PL), which may be a more reliable anchor point. This study compares the biomechanical properties of these two ligaments to elucidate which can withstand more stress to provide long-term stability following prolapse. Seventeen formalin-embalmed donors were used (PL: 17 right, 16 left; SALL, 15). The PL was evaluated to better characterize the ligament's properties within the pelvis using digital calipers and descriptive statistics. Mean values were statistically evaluated using an independent t test (p = 0.05) but no differences in laterality were appreciable. The PL and SALL samples were harvested and evaluated using a mechanical tester to determine their force at failure (N), toughness (Jm−2), and elastic modulus (MPa). The PL had increased values in the mean force at failure and toughness than the SALL when evaluated by each side as well as a combined mean value. These differences were statistically significant (p = 0.05) for toughness as evaluated using an independent t-test (right, p = 0.004; left, p = 0.005; combined, p = 0.002) and force at failure [right, p = 0.001 (independent t-test); left, p = 0.004 and combined, p = 0.005 (Mann–Whitney U test)], indicating that the PL may permit more deformation, but greater resistance to catastrophic failure as compared to the SALL. When evaluating any statistical differences in modulus, the individual and combined values were increased for the PL as compared to the SALL but were not significant (right, p = 0.290; left, p = 0.143; combined, p = 0.110) suggesting a stiffer material that may be more prone to catastrophic failure once a tear has begun. Collectively, these inherent biomechanical properties of the pectineal ligament indicate the ligament may be a more reliable anchor point for pelvic organ prolapse repair than the SALL. [ABSTRACT FROM AUTHOR]

Background: Lateral epicondylitis impacts 1–3% of the population. It affects nearly half of all tennis players, primarily due to repetitive forearm muscle use leading to pain at the lateral elbow, particularly at the extensor carpi radialis brevis tendon. While conservative treatments resolve most cases, 4–11% of patients with persistent pain require surgery. Tenotomy is the gold standard for repair, but the research comparing the benefits of specific types of tenotomies (open, arthroscopic, percutaneous, ultrasonically assisted, and Tenex forms) is lacking. Methods: PubMed and Embase searches were conducted for articles focused on four tenotomy techniques. The inclusion criteria allowed for the use of randomized controlled trials (RCTs), prospective cohort studies, and comparative observational studies, while the exclusion criteria excluded meta-analyses. Following the PRISMA guidelines, the initial search resulted in 2327 articles. Once the inclusion and exclusion criteria were applied, 1702 articles underwent abstract screening. Finally, 232 articles proceeded to full-text screening, resulting in 37 articles undergoing data extraction. Results: The primary outcomes included functional improvement, pain relief, overall performance, and postoperative disability. The secondary outcomes included patient-reported satisfaction, return-to-work timeframes, and procedural complications. Conclusions: The tenotomy outcomes were similar, regardless of the method, indicating that discussions with patients about their specific outcome preferences may help guide tenotomy method selection. [ABSTRACT FROM AUTHOR]

Background/Objectives: The Achilles tendon is a popular allograft option for anterior cruciate ligament (ACL) reconstruction. Structurally, the tendon is known to have a 90-degree rotational fiber track. Preparation techniques, with this consideration, may influence the strength of the graft. This study aims to assess the tensile strength of a novel Achilles tendon allograft harvest procedure following the rotational fiber track. Methods: Both Achilles tendons were harvested from formalin-embalmed cadavers [(n = 20), male n = 13, female n = 7, average age = 70]. Ten cadavers had the right Achilles as the control and the left Achilles as the fiber track sample; 10 cadavers had the opposing designation. Tensile strength was tested utilizing a Bose machine. An unpaired t-test was used to compare data across groups. Results: The average ultimate load for the control group was 874.17 N, with an average elastic stiffness of 76.01 N/mm. The ultimate load for the fiber track group was 807.84 N, with an average elastic stiffness of 64.75 N/mm. No statistically significant difference (p = 0.21) was determined between the average ultimate loads or elastic loads (p = 0.18) across groups. Conclusions: These data suggest that the rotational fiber track method of Achilles allograft has consistent tensile strength and elastic stiffness as compared to the common harvest procedure. The rotational fiber track method for ACL harvesting is a viable alternative option to the common harvest procedure for usage in an ACL reconstruction. [ABSTRACT FROM AUTHOR]

Limited reports have evaluated the utility of the popliteal vein (PV) specific to cannulation. The objective of this study was to characterize the diameter and length of the PV to evaluate this area as a potential cannulation site. The popliteal region in 23 formalin-embalmed, prosected donors was dissected, and the PV was exposed from the adductor hiatus (AH) superiorly to the small saphenous vein (SSV) inferiorly. The diameter of the popliteal vein was measured at the AH, SSV, and half of the distance from the AH to the SSV (MID) using a brass plumb bob. The length of the PV was measured to the AH, SSV, MID, and femoral condyles (FCs). Overall, the mean diameters and mean lengths for the combined population were calculated, as well as individual limbs (right, left) and anatomical sex. Univariate analysis used to evaluate differences in mean diameter and length measurements based on anatomical sex revealed significant differences (p < 0.05) for both diameter and length at all the landmarks evaluated. Multivariate analysis of PV diameter at the AH and SSV landmarks was statistically significant (p < 0.05) when laterally and anatomical comparing sex. These data provide full characterization of the PV in support of its utility in vascular access. [ABSTRACT FROM AUTHOR]

Variations of the sciatic nerve and piriformis muscle (SN-PM) relationship must be considered when discussing orthopedic procedures within the region as they may cause increased risk of SN injuries. Thirty-one formalin-embalmed, prosected donors were evaluated using the Beaton and Anson (B&A) classification system (1939). Major landmarks of the SN-PM relationship were identified, including the posterior superior iliac spine (PSIS), ischial tuberosity (IT), greater trochanter (GT), and the middle of the SN as it exits under the PM (S1). Distances measured included: PSIS-IT, PSIS-GT, IT-GT, PSIS-S1, IT-S1, GT-S1, S1-Q (distance of perpendicular line connecting S1 to PSIS-IT), and S1-R (distance of perpendicular line connecting S1 to PSIS-GT). Measurements from 49 lower extremities were evaluated using a two-tailed t-test to compare by sex and laterality; a one-tailed t-test was utilized to compare groups based on anatomical sex. Six donors displayed asymmetric B&A classifications, demonstrating gross anatomical differences within a single individual; however, no measurements were significant when comparing extremities. Seven measurements were statistically significant (p < 0.05) between sexes, indicating notable sex-based differences. These data highlight sex-based differences in the SN-PM relationship, as well as consistencies within measurements among extremities, which can be utilized by clinicians when treating male and female patients needing unilateral or bilateral orthopedic procedures or injections within the gluteal region. [ABSTRACT FROM AUTHOR]

Gross anatomy laboratories frequently utilize dissection or prosection formats within medical curricula. Practical examination scores are consistent across the formats, yet these examinations assessed larger anatomical structures. In contrast, a single report noted improved scores when prosection was used in the hand and foot regions, areas that are more difficult to dissect. The incorporation of prosected donors within "Head and Neck" laboratories provided an opportunity to further characterize the impact of prosection in a structurally complex area. Retrospective analysis of 21 Head and Neck practical examination questions was completed to compare scores among cohorts that utilized dissection exclusively or incorporated prosection. Mean scores of practical examination questions were significantly higher in the prosection cohort (84.27% ± 12.69) as compared with the dissection cohort (75.59% ± 12.27) (p < 0.001). Of the 12 questions that performed better in the prosection cohort (88.42% ± 8.21), 10 items mapped to deeper anatomical regions. By comparison, eight of nine questions in the dissection cohort outperformed (88.44% ± 3.34) the prosection cohort (71.74% ± 18.11), and mapped to anatomically superficial regions. Despite the mean score increase with positional location of the questions, this effect was not statically significant across cohorts (p = 1.000), suggesting that structure accessibility in anatomically complex regions impacts performance. Student feedback cited structure preservation (71.5%) and time savings (55.8%) as advantages to prosection; however, dissection was the perceived superior and preferred laboratory format (88.6%). These data support combined prosection and dissection formats for improving student recognition of deeply positioned structures and maximizing student success. [ABSTRACT FROM AUTHOR]

Fellows completing the Clinical Anatomy Fellowship at Kansas City University assist Anatomy faculty in the Gross Anatomy laboratory, complete robust research projects, and support other departments. The program's positive impact on participants has been reported; however, the impact on individuals interfacing with Fellows has not been investigated. A follow‐up, survey‐based (Likert scale, multiple‐choice, open‐ended) study was conducted to evaluate faculty, staff, and student perceptions of the program. Ninety‐five percent of surveyed faculty and staff (n = 22) perceived the Fellows as beneficial to students, faculty, and the university (p < 0.05) by acting as role models (95%) and mentors (90%), contributing to educational processes (90%), and reducing faculty work burden (81%) (p < 0.05). Student responses (n = 95) were also positive: 97% perceived interactions with Fellows as beneficial (p < 0.05). A passion for Anatomy (mean, 4.6; p < 0.05) and the opportunity to increase competitiveness for residency (mean, 4.5; p < 0.05) were the most important factors driving interest in the Fellowship (Cronbach's alpha, 0.766). In contrast, diverting a year from the school's curriculum (mean, 4.4; p < 0.05) and delaying clinical experiences (mean, 4.3; p < 0.05) were the most important deterrents (Cronbach's alpha, 0.505). Additionally, the financial investment required by the program is lower than that associated with hiring full‐time faculty. Analysis comparing employment of Fellows versus associate‐level faculty identified annual net savings of $370,000. Not only does the Fellowship augment faculty and student experiences at the university, but it also allows for substantial cost savings. Collectively, these data are evidence for other health professional institutions to consider adopting a similar program. [ABSTRACT FROM AUTHOR]

The supratrochlear artery (STA) demonstrates anatomical variability that impacts facial reconstruction with a paramedian forehead flap. STA branching patterns and the distance to the midline have been reported, but the STA pedicle has not been characterized. Our aim was to triangulate the STA pedicle relative to known anatomical landmarks and identify a danger zone to aid surgeons in creating viable tissue flaps. The upper facial region was dissected bilaterally on 38 cadaveric donors. Measurements from the supraorbital neurovascular bundle, orbital rim, and medial canthus to the STA pedicle were collected. Data were tallied and statistically analyzed. Measurement means, range, and standard deviations were calculated; no significant differences were found in the laterality of the measurements (p > 0.05). Statistically significant, sex-based differences were identified for all measurements collected among male and female donors. This study characterizes a surgical danger zone for the STA pedicle specific to a paramedian forehead flap and identifies important differences within this danger zone among male versus female donors that surgeons should consider to prevent pedicle violation and enhance surgical success while maximizing flap length and mobility. [ABSTRACT FROM AUTHOR]

Kansas City University offers a Clinical Anatomy Fellowship which enrolls nine medical students during each academic year and provides training in research, teaching, and advanced anatomical topics. The Fellows practice as novice educators, working alongside Anatomy faculty to teach medical students in the Gross Anatomy laboratory. However, little has been reported related to Fellowship participation and success outcomes. This survey‐based study was designed to explore (1) student motivation(s) for pursuing the Fellowship, (2) benefits of participation, and (3) the perceived impact on residency applications and career success. Three unique populations were surveyed. The most important factors driving application to the Fellowship were a desire to increase competitiveness in the residency application process (Likert mean score 4.7–5.0) and a passion for Anatomy (Likert mean score 4.3–4.7). Taking a year away from the College of Osteopathic Medicine curriculum (Likert mean score 4.4) and delaying clinical exposure (Likert mean score 4.2) were the most important deterrents to application. The most reported benefits after program completion included opportunities to build a strong residency application (44% and 50% of Fellows), conduct research (44% and 45% of Fellows), and participate in teaching (11% and 50% of Fellows). 73% of past Fellows matched into their top specialty of choice. Flexibility in the program allows participants to individualize their Fellowship experience to address their personal goals related to residency applications and careers as future physicians. As the results suggest, the Clinical Anatomy Fellowship benefits Fellows, signaling other medical institutions to consider adopting a similar program. [ABSTRACT FROM AUTHOR]

Anatomy and physiology are tightly linked disciplines that complement each other, however, in medical education delivery of this content is often siloed and divided. To address this, we created combined anatomy and physiology content for the female reproductive system, and team-taught designated histology and embryology topics integrated with the physiology content. Collectively, this created a more holistic incorporation of topics for student learning. Here we describe the format and approach for this teaching innovation. [ABSTRACT FROM AUTHOR]

Background: Major branching patterns of the facial nerve have been extensively studied because damage to branches of the nerve is associated with complications ranging from weakness to paralysis. However, communicating branches of the facial nerve have received far less attention despite being hypothesized as a means of motor recovery following facial nerve injury.Objectives: The aim of this study was to characterize the frequency of communicating branches of the facial nerve to provide clarity on their anatomy and clinical correlations.Methods: Bilateral facial dissections were completed on cadaveric donors (n = 20) to characterize the frequency and location of communicating branches across terminal branches of the facial nerve. Statistical analyses were employed to analyze differences between the location of communications by side and whether the communicating branches were more likely to occur on the left or right side (P < 0.05).Results: Communicating branches were identified among all terminal branches of the facial nerve and their frequencies reported. The highest frequencies of communicating branches were identified between the buccal-to-marginal mandibular and zygomatic-to-buccal branches, at 67.5% (27 comm/40 hemifaces). The second highest frequency was identified between the temporal-to-zygomatic branches in 62.5% (25/40) of donors. The marginal mandibular-to-cervical branches had communicating branches at a frequency of 55% (22/40). Location or sidedness of communicating branches did not significantly differ.Conclusions: Our characterization more accurately defines generalizable areas in which communicating branches are located. These locations of branches, described in relation to nearby landmarks, are fundamental for clinical and surgical settings to improve procedural awareness. [ABSTRACT FROM AUTHOR]

Holoprosencephaly (HPE) is a failure of the forebrain to bifurcate and is the most common structural malformation of the embryonic brain. Mutations in SHH underlie most familial (17%) cases of HPE; and, consistent with this, Shh is expressed in midline embryonic cells and tissues and their derivatives that are affected in HPE. It has long been recognized that a graded series of facial anomalies occurs within the clinical spectrum of HPE, as HPE is often found in patients together with other malformations such as acrania, anencephaly, and agnathia. However, it is not known if these phenotypes arise through a common etiology and pathogenesis. Here we demonstrate for the first time using mouse models that Hedgehog acyltransferase (Hhat) loss-of-function leads to holoprosencephaly together with acrania and agnathia, which mimics the severe condition observed in humans. Hhat is required for post-translational palmitoylation of Hedgehog (Hh) proteins; and, in the absence of Hhat, Hh secretion from producing cells is diminished. We show through downregulation of the Hh receptor Ptch1 that loss of Hhat perturbs long-range Hh signaling, which in turn disrupts Fgf, Bmp and Erk signaling. Collectively, this leads to abnormal patterning and extensive apoptosis within the craniofacial primordial, together with defects in cartilage and bone differentiation. Therefore our work shows that Hhat loss-of-function underscrores HPE; but more importantly it provides a mechanism for the co-occurrence of acrania, holoprosencephaly, and agnathia. Future genetic studies should include HHAT as a potential candidate in the etiology and pathogenesis of HPE and its associated disorders. [ABSTRACT FROM AUTHOR]

R3916 --> 633.5 --> Introduction/Objective: Drawing, observational activities, and touch have been shown to enhance the learning process of three‐dimensional structure in anatomy (Reid et al., 2019). However, the impact of observational activities and touch on learning outcomes specific to cadaver specimens has not been reported. We hypothesized that physical touch of prosected, cadaveric donors would lead to improved knowledge of human structure and higher scores on laboratory practicals. The purpose of this study was to evaluate the differences in learning outcomes by comparing laboratory practical grades of students who physically touched or did not physically touch cadaveric donors. Materials/Methods: We incorporated prosected cadaver specimens in two undergraduate, pre‐professional and pre‐Health Sciences anatomy courses in an effort to enhance student learning. The physical manipulation of cadaveric donors by students enrolled in BIO 201, Human Anatomy (majors), and BIO 221, Human Anatomy and Physiology (non‐majors) was tracked to determine if manipulation of the cadavers improves laboratory assessment outcomes. Students (n=176) from the courses across seven semesters were assigned as those who 'manipulated' (n=100) or 'did not manipulate' (n=76) the donors. Data was tallied and compared to performance on laboratory practical assessments. A Fisher's exact test was conducted within individual course and combined course populations to assess if the relationship between physically touching a cadaver and receiving a passing grade on lab practical assessments is more than expected by chance. Results: Overall, students who manipulated cadaveric donors were more successful in the laboratory component of Anatomy courses than those who 'did not manipulate.' BIO 201 students who actively touched the cadaver during laboratory sessions received a "C" or better (n=58 vs 6 DFW) on lab practical assessments. In contrast, the majority of students who did not touch the cadaver earned a DFW (n=33 vs 18 C or better) (P <0.0001). Similar outcomes were identified for BIO 221 students; the 34 students who actively touched the cadaver during lab sessions received a "C" or better vs non‐passing, DFW grades (n=2). However, 'non‐manipulating' BIO 221 students were able to earn outcomes of "C" or better (n=13) as compared to non‐passing grades (DFW, n=12). Despite this, statistically, students were more likely to receive a passing grade for the laboratory assessments with a "C" or better when actively involved in cadaver‐based learning (P=0.0002). The student data was also analyzed as a single cohort, providing additional statistical evidence that students who used the cadavers were more likely to earn a higher grade for the laboratory component of the course (n=92 with a "C" or better vs 8 DFW) than students who did not use the cadavers (n=32 with a "C" or better vs 44 DFW) (P <0.0001). Our data indicates that a student is 7.24 times more likely to earn a "DFW" on lab practical assessments in anatomy‐based courses when they do not touch the cadaver. Significance: These data suggest students enrolled in anatomy courses with cadaveric donors will have improved lab assessment outcomes if they physically touch the donors. Conclusion: It is imperative that anatomy faculty recognize that exposure to cadaveric donors may impact the overall learning experience, as students are better prepared for identification‐based practical assessments when they are encouraged to touch, handle, and manipulate anatomical structures. [ABSTRACT FROM AUTHOR]

R2119 --> 474.6 --> Introduction/Objective: Medical schools have made an increasing effort to provide students with online anatomical resources. Yet, studies report that most students who encounter a question during their anatomy study will consult the internet or social media to find supplemental resources before using course materials. A quick internet search by a novel anatomist may lead to inaccurate information and overwhelming results. We created sets of accurate and unique anatomical diagrams and shared these via a social media account to assess their perceived utility and accessibility to students learning anatomy. Materials/Methods: Anatomical diagrams were created and shared on a public Instagram account, Anatomy Adventures, during the 2020‐21 academic year. The systems‐oriented graphics covered musculoskeletal, nervous, gastrointestinal, and reproductive systems, including the osteology, myology, and neurovasculature of each system. An IRB‐approved survey (10.6% response rate) was distributed from March‐April 2021, assessing: 1) the demographics of the surveyed population, 2) how the diagrams were utilized, and 3) how they could be improved. A free‐form space was included for optional feedback. Responses were tabulated and converted to frequencies and percentages; descriptive codes were applied to the data according to published methods to summarize verbatim responses. Chi square test assessed differences among the responses when applicable. Alpha<5%. Results: Of the 111 survey responses, 95% participants fell within the 18‐30 age range, with 78% identifying as female. The majority of participants were medical students (69%), but the sample also included undergraduate/graduate students (16%), as well as fully employed participants (14%). Geographically, most participants were located in the North and Central (69%) or other (27%) regions of the United States (US), with 4% located outside of the US. As for utility, 54% of participants reported using the diagrams to study for medical school coursework or board examinations, and 42% of responses indicated non‐medical use of the diagrams, such as leisure viewing or reviewing for their occupation. Free‐form responses (n=65) were coded into categories characterizing the utility of the diagrams: 1) color‐coding (12.3%), 2) simplicity (43%), and 3) style (24.6%) (P=0.0025). Significance: We demonstrate that supplemental resources shared via social media have the potential to be widely used by students, specifically by those 18‐30 years. The inherent flexibility of social media is how consumers preferred to utilize information. Qualitative data indicated presentation style largely impacts how resources are utilized by students, as an overwhelming majority report gaining unique information from this resource. Conclusion: Social media platforms can be used by educators to disseminate accurate supplemental materials to students. Anatomy educators should consider utilizing social media to fill gaps in anatomy education to provide accurate and accessible resources. [ABSTRACT FROM AUTHOR]

Pregnane X receptor (PXR, NR1I2) is a member of the ligand-activated nuclear receptor superfamily. This receptor is promiscuous in its activation profile and is responsive to a broad array of both endobiotic and xenobiotic ligands. PXR is involved in pivotal cellular detoxification processes to include the regulation of genes that encode key drug-metabolizing cytochrome-P450 enzymes, oxidative stress response, as well as enzymes that drive steroid and bile acid metabolism. While PXR clearly has important regulatory roles in the liver and gastrointestinal tract, this nuclear receptor also has biological functions in breast tissue. In this review, we highlight current knowledge of PXR's role in mammary tumor carcinogenesis. The elevated level of PXR expression in cancerous breast tissue suggests a likely interface between aberrant cell division and xeno-protection in cancer cells. Moreover, PXR itself exerts positive effect on the cell cycle, thereby predisposing tumor cells to unchecked proliferation. Activation of PXR also plays a key role in regulating apoptosis, as well as in acquired resistance to chemotherapeutic agents. The repressive role of PXR in regulating inflammatory mediators along with the existence of genetic polymorphisms within the sequence of the PXR gene may predispose individuals to developing breast cancer. Further investigations into the role that PXR plays in driving tumorigenesis are needed. [ABSTRACT FROM AUTHOR]

Proper craniofacial development begins during gastrulation and requires the coordinated integration of each germ layer tissue (ectoderm, mesoderm, and endoderm) and its derivatives in concert with the precise regulation of cell proliferation, migration, and differentiation. Neural crest cells, which are derived from ectoderm, are a migratory progenitor cell population that generates most of the cartilage, bone, and connective tissue of the head and face. Neural crest cell development is regulated by a combination of intrinsic cell autonomous signals acquired during their formation, balanced with extrinsic signals from tissues with which the neural crest cells interact during their migration and differentiation. Although craniofacial anomalies are typically attributed to defects in neural crest cell development, the cause may be intrinsic or extrinsic. Therefore, we performed a phenotype-driven ENU mutagenesis screen in mice with the aim of identifying novel alleles in an unbiased manner, that are critically required for early craniofacial development. Here we describe 10 new mutant lines, which exhibit phenotypes affecting frontonasal and pharyngeal arch patterning, neural and vascular development as well as sensory organ morphogenesis. Interestingly, our data imply that neural crest cells and endothelial cells may employ similar developmental programs and be interdependent during early embryogenesis, which collectively is critical for normal craniofacial morphogenesis. Furthermore our novel mutants that model human conditions such as exencephaly, craniorachischisis, DiGeorge, and Velocardiofacial sydnromes could be very useful in furthering our understanding of the complexities of specific human diseases., (Copyright © 2011 Wiley-Liss, Inc.)