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4 results on '"Annika Steinmeier"'

1. Cerebellar rTMS and PAS effectively induce cerebellar plasticity

Author

Martje G. Pauly, Annika Steinmeier, Christina Bolte, Feline Hamami, Elinor Tzvi, Alexander Münchau, Tobias Bäumer, and Anne Weissbach

Subjects
Medicine, Science
Abstract

Abstract Non-invasive brain stimulation techniques including repetitive transcranial magnetic stimulation (rTMS), continuous theta-burst stimulation (cTBS), paired associative stimulation (PAS), and transcranial direct current stimulation (tDCS) have been applied over the cerebellum to induce plasticity and gain insights into the interaction of the cerebellum with neo-cortical structures including the motor cortex. We compared the effects of 1 Hz rTMS, cTBS, PAS and tDCS given over the cerebellum on motor cortical excitability and interactions between the cerebellum and dorsal premotor cortex / primary motor cortex in two within subject designs in healthy controls. In experiment 1, rTMS, cTBS, PAS, and tDCS were applied over the cerebellum in 20 healthy subjects. In experiment 2, rTMS and PAS were compared to sham conditions in another group of 20 healthy subjects. In experiment 1, PAS reduced cortical excitability determined by motor evoked potentials (MEP) amplitudes, whereas rTMS increased motor thresholds and facilitated dorsal premotor-motor and cerebellum-motor cortex interactions. TDCS and cTBS had no significant effects. In experiment 2, MEP amplitudes increased after rTMS and motor thresholds following PAS. Analysis of all participants who received rTMS and PAS showed that MEP amplitudes were reduced after PAS and increased following rTMS. rTMS also caused facilitation of dorsal premotor-motor cortex and cerebellum-motor cortex interactions. In summary, cerebellar 1 Hz rTMS and PAS can effectively induce plasticity in cerebello-(premotor)-motor pathways provided larger samples are studied.

Published
2021
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2. Eingebrochen – Osteoporotische Wirbelkörperfrakturen

Author

Andrea Wilck, Robert Zahn, and Annika Steinmeier

Subjects
General Earth and Planetary Sciences, General Environmental Science
Abstract

Im Gegensatz zu gesunden Menschen reichen bei Patient*innen mit Osteoporose häufig schon Bagatellunfälle aus, damit ein Wirbelkörper frakturiert. Entscheidend für die Behandlung sind anschließend die Beschwerden, die Frakturform sowie die Fehlstellung. Sowohl in der konservativen Versorgung als auch postoperativ spielt Physiotherapie eine entscheidende Rolle.

Published
2023
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3. Gebrochener Körper – Nachbehandlung thorakolumbaler Wirbelkörperfrakturen

Author

Robert Zahn, Annika Steinmeier, and Andrea Wilck

Abstract

Ob Traumata oder Osteoporose – die Ursachen von Wirbelkörperfrakturen sind vielfältig. So auch ihre Nachbehandlung. Nicht immer ist eine OP indiziert. Kommt es aber dazu, haben in der Physiotherapie Patientenedukation, Schulung von selbstständigen Transfers und die Aktivitäten des täglichen Lebens oberste Priorität.

Published
2022
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4. Full-length standing radiographs can be used for determination of the Femoral neck-shaft angle but not acetabular coverage

Author

Sufian S. Ahmad, Christian Konrads, Annika Steinmeier, Max Ettinger, Henning Windhagen, and Gregor M. Giebel

Subjects
Orthopedics and Sports Medicine, Surgery
Abstract

Introduction: The exact evaluation of hip morphology is essential for surgical planning. A wide range of morphometric measures of the acetabulum is deduced from conventional anterior-posterior (ap) pelvic radiographs. Full-length weight-bearing radiographs (FLWBR) also depict the acetabulum and are commonly used for osteotomy planning of the lower limb. This study aimed to determine whether FLWBR can be used to evaluate acetabular morphology. Methods: Radiographs of patients receiving a hip workup that included a conventional ap pelvic X-ray and FLWBR were utilized for radiographic measurements. The following parameters were measured: extrusion index of the femoral head, anterior wall index, posterior wall index, lateral center edge angle (LCE), acetabular index, pubic arc angle (subpubic angle), and centrum-collum-diaphyseal angle (CCD). Results: FLWBR depicted a significantly reduced anterior coverage (p = 0.049) and increased posterior coverage (p p = 0.015), and higher pubic-arc angle (p = 0.02) compared to conventional ap pelvic radiographs. There were no significant differences regarding the CCD angle (p = 0.28), extrusion index (p = 0.31), and LCE (p = 0.16). Discussion: The CCD angle of the femur can be measured on conventional ap radiographs and full-length weight-bearing X-rays for lower limb deformity analysis. However, FLWBR will depict an anteverted acetabular morphology, rendering conventional ap radiographs necessary for planning pelvic osteotomies.

Published
2022

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