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Investigation of the dorsal cutaneous nerve injury risk and portal safety related to wrist surgery: an anatomical study.
Anat Sci Int
January 2025
Department of Anatomy, Faculty of Medicine, Ege University, Izmir, Turkey.
The aim of this study was to define the branching patterns and innervation regions of the superficial branch of the radial nerve and the dorsal branch of the ulnar nerve and to evaluate the distance from 1-2, 3-4, 4-5, midcarpal radial, midcarpal ulnar, dorsal radioulnar joint, 6-radial, 6-ulnar dorsal arthroscopy portals to certain landmarks on the dorsal surface of the hand and wrist. Forty hands and wrists of 20 formalin-fixed intact cadavers without any known pathology, surgical scars or trauma were examined in the Macroscopy Laboratory of Ege University Faculty of Medicine, Department of Anatomy. Arthroscopy portals were placed using a dorsal approach to the wrist in the dissection method.
View Article and Find Full Text PDFMRI grading using the neuropathy score-reporting and data system with electrodiagnostic correlation in radial neuropathy around the elbow: a 13-year retrospective review.
Skeletal Radiol
January 2025
Department of Radiology, NYU Langone Orthopedic Hospital, 301 East 17Th Street, 6Th Floor, Radiology , New York, NY, 10003, USA.
Objective: To evaluate the Neuropathy Score-Reporting and Data System (NS-RADS) MRI grading system in conjunction with electrodiagnostic (EDx) testing for radial neuropathy at the elbow.
Materials And Methods: Patients presenting between 2010 and 2023 with suspected radial neuropathy who underwent both EDx testing in the form of electromyography and nerve conduction studies and MRI within a 12-month period were evaluated. Three blinded radiologists used the NS-RADS grading system to evaluate nerve entrapment (E grades), muscle denervation (M grades) proximally within the supinator/extensor carpi radialis brevis (ECRB), and more distally within the forearm extensor muscles.
Schwann cells have a limited window of time in which to initiate myelination signaling during early migration in vivo.
Cells Dev
January 2025
Université Paris-Saclay, Hôpital Kremlin Bicêtre, U1195, Inserm, 94276 Le Kremlin Bicêtre, France. Electronic address:
The temporal control of mitotic exit of individual Schwann cells (SCs) is essential for radial sorting and peripheral myelination. However, it remains unknown when, during their multiple rounds of division, SCs initiate myelin signaling in vivo. By manipulating SC division during development, we report that when SCs skip their division during migration, but not during radial sorting, they fail to myelinate peripheral axons.
View Article and Find Full Text PDFComparison of CT-like MRI sequences for preoperative planning of cochlear implantation using super-high-resolution CT as a reference.
Eur Radiol Exp
January 2025
Guilloz Imaging Department, Central Hospital, University Hospital Center of Nancy, 29 Avenue du Marechal de Lattre de Tassigny, 54000, Nancy, France.
Background: We evaluated the accuracy of magnetic resonance imaging (MRI) computed tomography (CT)-like sequences compared to normal-resolution CT (NR-CT) and super-high-resolution CT (SHR-CT) for planning of cochlear implantation.
Methods: Six cadaveric temporal bone specimens were used. 3-T MRI scans were performed using radial volumetric interpolated breath-hold (STARVIBE), pointwise-encoding time reduction with radial acquisition (PETRA), and ultrashort time of echo (UTE) sequences.
Fascicle differentiation of upper extremity nerves on high-resolution ultrasound with multimodal microscopic verification.
Sci Rep
January 2025
Department of Radiology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.
This study aimed to compare the fascicular anatomy of upper limb nerves visualized using in situ high-resolution ultrasound (HRUS) with ex vivo imaging modalities, namely, magnetic resonance microscopy (MRM), histological cross-sections (HCS), and optical projection tomography (OPT). The median, ulnar, and superficial branch of radial nerve (n = 41) were visualized in 14 cadaveric upper limbs using 22-MHz HRUS. Subsequently, the nerves were excised, imaged with different microscopic techniques, and their morphometric properties were compared.
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