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Spontaneous muscle activity in multifocal motor neuropathy - Insights from axonal excitability testing.
Clin Neurophysiol
January 2025
Department of Clinical Neurophysiology, Rigshospitalet, Copenhagen, Denmark; Department of Clinical Medicine and Neuroscience, University of Copenhagen, Denmark; Department of Neurology, Rigshospitalet, Copenhagen, Denmark.
Objective: To investigate motor axonal excitability in multifocal motor neuropathy (MMN) associated with involuntary muscle activity.
Methods: Two MMN patients with continuous involuntary finger movements (MMNifm) were compared to 11 patients without movements (MMNnfm). Clinical examination, EMG of the abductor pollicis brevis muscle, nerve conduction studies, motor unit number estimation, excitability studies, and mathematical modeling were conducted in the patients with MMN and compared to controls.
Maximizing the translational potential of neurophysiology in amyotrophic lateral sclerosis: a study on compound muscle action potentials.
Amyotroph Lateral Scler Frontotemporal Degener
January 2025
Department of Neuroscience, Sheffield Institute for Translational Neuroscience (SITraN), The University of Sheffield, Sheffield, UK and.
Mouse models of amyotrophic lateral sclerosis (ALS) enable testing of novel therapeutic interventions. However, treatments that have extended survival in mice have often failed to translate into human benefit in clinical trials. Compound muscle action potentials (CMAPs) are a simple neurophysiological test that measures the summation of muscle fiber depolarization in response to maximal stimulation of the innervating nerve.
View Article and Find Full Text PDFAccuracy of a Superficial Landmark of the Recurrent Branch of the Median Nerve and Anatomical Features of Transverse Muscle Fibres Observed During Carpal Tunnel Release.
J Hand Surg Asian Pac Vol
January 2025
Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan.
Surgeons use anatomical landmarks like the scaphoid tubercle, pisiform, trapezial tubercle and hook of hamate, along with Kaplan cardinal line (KCL) to avoid injury to the recurrent motor branch (RMB) of the median nerve during carpal tunnel release. The presence of transverse muscle fibres (TMF) overlying the transverse carpal ligament (TCL) may suggest proximity of the RMB, but their anatomical relationship is unclear. In this study, we evaluated the accuracy of anatomical landmarks to the RMB, TMF origin and insertion, and examined the relationship between TMF presence and RMB running patterns.
View Article and Find Full Text PDFThe Higher Positive Amyloid Deposition in Electrophysiologically Proven Idiopathic Carpal Tunnel Syndrome Patients.
J Hand Surg Asian Pac Vol
January 2025
Department of Orthopaedic Surgery, Kochi Medical School, Kochi University, Nankoku, Japan.
Carpal tunnel syndrome (CTS) due to amyloid deposition was reported to precede fatal cardiac amyloidosis by several years. Although nerve conduction study (NCS) supports CTS diagnosis, the incidence of positive amyloid deposition in electrophysiologically proven CTS is unclear. We retrospectively analysed the demographic data including age, gender, bilateral hand involvement, amyloid deposition and NCS results, of 111 consecutive CTS patients with postoperative symptom improvement (mean 71.
View Article and Find Full Text PDFQuantifying thenar muscle biomechanical properties: Sex-based variations and implications for grip strength.
J Hand Ther
January 2025
Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Bitlis Eren University, Bitlis, Turkey; Department of Physical Therapy and Rehabilitation, Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey.
Background: Quantifying the biomechanical properties of the thenar muscle can provide valuable insight into hand assessment methods.
Purpose: This study aimed to examine the reliability of myotonometer measurements in determining the biomechanical properties (tone, stiffness and elasticity) of thenar muscles in healthy individuals and explore sex-based variations. Additionally, it assessed the relationship between pinch strength and these properties.
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