PURPOSE The purpose of this study was to investigate the displacement of the median nerve in the carpal tunnel during finger motion at varied wrist positions using transverse ultrasound in healthy volunteers, in order to clarify the appropriate position of a wrist splint in treating carpal tunnel syndrome. METHODS Fifty wrists of 25 asymptomatic volunteers were evaluated by transverse ultraso...

carpal tunnel syndrome is known as an industrial new epidemic. in many of jobs, the same motions of hand are repeated thousands of times a day.  each day the number of people with the syndrome is increasing. clerks, workers in food preparation and packaging, and secretaries of large supermarkets have a high risk for suffering from this syndrome. in fact, all people who flex and extend their wri...

Entrapment neuropathies have been known for many years. The larger peripheral nerve entrapment lesions such as that of the ulnar nerve at the elbow (Paget 1864), carpal tunnel syndrome (Learmonth 1933) and more recently tarsal tunnel syndrome (Keck 1962, Lam 1962) and the entrapment of the radial nerve in the persistent “tennis elbow” (Roles and Maudsley 1972) have all been described. Neuropath...

OBJECTIVE To develop work guidelines for wrist posture based on carpal tunnel pressure. BACKGROUND Wrist posture is considered a risk factor for distal upper extremity musculoskeletal disorders, and sustained wrist deviation from neutral at work may be associated with carpal tunnel syndrome. However, the physiologic basis for wrist posture guidelines at work is limited. METHODS The relation...

The transverse carpal ligament (TCL) plays a critical role in carpal tunnel biomechanics through interactions with its surrounding tissues. The purpose of this study was to investigate the in vivo adaptations of the TCL's mechanical properties in response to repetitive hand use in pianists using acoustic radiation force impulse (ARFI) imaging. It was hypothesized that pianists, in comparison to...

To the Editor: I enjoyed reading the article " Prevalence of Carpal Tunnel Syndrome in Motorcyclists " by Manes. 1 This article provides insight into a possible new association of symptoms with or the diagnosis for carpal tunnel syndrome due to motorcycle riding. The article makes recommendations for possible risk reduction (ie, prevention), which should be encouraged. However, problems with th...