title: Mechanosensitivity of the median nerve in patients with chronic carpal tunnel syndrome.
abstract: The aim was to investigate the relationship between the effects of median nerve strain during the elbow extension component of the upper limb neurodynamic test 1 (ULNT1) and the evoked musculoskeletal changes. 11 patients with chronic carpal tunnel syndrome (CTS) and 11 matched asymptomatic controls participated in the study. In all subjects, elbow extension was carried out in both ULNT1 and neutral positions of the shoulder and arm. From these two starting positions a KIN-COM(®) dynamometer carried out passive elbow extension while EMG activity of 10 arm and shoulder muscles, elbow-flexor resistive torque and elbow extension ROM were measured concurrently. The result showed that, in the ULNT1 position, increased EMG activity of the involved muscles, increased elbow extension resistive torque and pain responses occurred much earlier in the range of elbow extension in the CTS group compared to healthy controls. These findings demonstrated increased mechanosensitivity of the median nerve in CTS patients compared to healthy controls.
authors.affiliation: Department of Physiotherapy, School of Primary Health Care, Faculty of Medicine, Nursing and Health Sciences, Monash University, Peninsula Campus, Melbourne, Australia. shapour.jaberzadeh@med.monash.edu.au
authors.forename: Shapour
authors.initials: S
authors.lastname: Jaberzadeh
authors.forename: Maryam
authors.initials: M
authors.lastname: Zoghi
mesh_terms: D000328:Adult; D001132:Arm / Q000294:innervation / Q000502:physiology; D002349:Carpal Tunnel Syndrome / Q000503:physiopathology*; D004551:Elbow Joint / Q000502:physiology; D004576:Electromyography; D005260:Female; D006801:Humans; D008297:Male; D008465:Mechanoreceptors / Q000502:physiology*; D008475:Median Nerve / Q000503:physiopathology*; D008875:Middle Aged; D053581:Muscle Strength Dynamometer; D009129:Muscle Tonus / Q000502:physiology*; D011434:Proprioception / Q000502:physiology; D016059:Range of Motion, Articular / Q000502:physiology; D011984:Sensory Receptor Cells / Q000502:physiology*; D019415:Torque