Search

Objective: To investigate associations between preoperative lumbar multifidus muscle (LMM) and psoas major muscle qualities and preoperative and postoperative patient-reported outcomes (PROs) after anterolateral lumbar interbody fusion (A-LLIF)., Methods: A retrospective review was conducted of patients with A-LLIF between L1 and S1 during 2017-2022 at a single institution who had at least approximately 1 year of follow-up and preoperative magnetic resonance imaging available. Preoperative magnetic resonance imaging was analyzed using 2 image analysis platforms (AMBRA and ImageJ). Parameters studied included cross-sectional area (CSA) and fat infiltration indices. Pearson correlation and multiple linear regression analyses were used to study relationships between muscle quality and preoperative and postoperative PROs. Subanalyses were performed for LMM CSA percentiles and stratification of previous surgery., Results: One hundred patients met the inclusion criteria (mean [standard deviation] age, 65.3 [11.0] years; 57% women, 43% men) during a mean (standard deviation) follow-up period of 1.29 (0.20) years. In total, 207 surgical levels were analyzed. Smaller LMM CSA was significantly associated with greater preoperative disability and preoperative back pain (P < 0.04 [ImageJ]). There were no statistically significant confounding factors. Patients with greater LMM CSA and previous lumbar procedures (n = 42) had more improvement in visual analog scale for lower back pain delta scores (P = 0.02 [ImageJ]; P = 0.04 [AMBRA]). Neither LMM fat infiltration indices nor psoas major muscle morphology influenced PROs., Conclusions: Significant associations were found between LMM CSA and preoperative disability and back pain. Compared to A-LLIF patients with larger LMM (CSA >12 cm 2 ), those with LMM CSA <5 cm 2 had significantly greater preoperative disability and back pain., (Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.)

The contributions of Laurent Princeteau (1858-1932) to anatomy and to the establishment of neurosurgery have largely gone unrecognized, perhaps because he was educated and practiced in a French city other than Paris at a time when Paris was one of the chief centers of medicine in Europe. After completing a thesis describing an iliac artery anomaly and obtaining the distinguished agrégé teaching degree, Princeteau began his surgical career at the University of Bordeaux. Within 10 years, he became chef de clinique and one of the busiest surgeons in Saint-André Hospital, as well as head of the anatomy institute and professor of anatomy at the dental school. In 1891, he achieved the rank of surgeon. In the field of general anatomy, he was recognized for novel cadaveric preparations and vascular perfusion techniques. In the neurosciences, he made important contributions to the anatomy of the trigeminal nerve and trigeminal neuralgia. In 1898, Princeteau supervised a thesis that addressed contemporary surgical approaches to the trigeminal complex. In the course of this effort, he identified a bony prominence near the petrous apex (the retrogasserian tubercle) that helped to locate the gasserian ganglion. The surgical significance of the retrogasserian tubercle was quickly acknowledged in the European neurosurgical community and was noted in French textbooks of anatomy. Thierry de Martel, a founding member of the French neurosurgical School, named the tubercle after Princeteau. To the rest of the world, however, it remained almost unknown., (Copyright © 2024. Published by Elsevier Inc.)