scholarly journals Electromyographic diagnosis of the carpal tunnel syndrome

1978 ◽  
Vol 36 (2) ◽  
pp. 127-134 ◽  
Author(s):  
K. Toyonaga ◽  
C. R. de Faria
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Normal Subjects ◽  
Electrophysiological Evidence ◽  
Sensory Conduction ◽  
Conduction Velocities ◽  
Tunnel Syndrome ◽  
Normal Women ◽  
Over 40 Years

Sensory conduction velocities of the median nerVe were studied from digit to palm and from palm to wrist in normal subjects and in patients with the carpal tunnel syndrome. Definite slowing was noted in the palm to wrist segment, even in the early carpal tunnel syndrome. It was noted that 37% of normal women over 40 years of age had electrophysiological evidence of the carpal tunnel syndrome.

Relationship between the Self-Administered Boston Questionnaire and Electrophysiological Findings in Follow-Up of Surgically-Treated Carpal Tunnel Syndrome

2000 ◽  
Vol 25 (2) ◽  
pp. 128-134 ◽  
Author(s):  
M. MONDELLI ◽  
F. REALE ◽  
F. SICURELLI ◽  
L. PADUA
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Conduction Velocities ◽  
Electrophysiological Findings ◽  
Tunnel Syndrome ◽  
Electrophysiological Examination ◽  
A Prospective Study ◽  
And Function

A prospective study of electrophysiological examination and the Boston self-administered questionnaire (BQ) was carried out in patients with surgically-treated carpal tunnel syndrome. There were 104 hands in 93 patients (13 men and 80 women, mean age 56 years). The BQ was used to assess the severity of symptoms and function, and nerve conduction studies were done before surgical release by short incision at the palm, and at follow-ups 1 and 6 months after surgery. The BQ severity score improved or became normal in 98% of hands. The mean BQ scores and distal sensory and motor conduction velocities in the median nerve showed significant improvement at the 1 month follow-up. Further significant improvement was found at 6 months. There was no relationship between the improvements in BQ scores and the distal conduction in the median nerve. The degree of improvement in sensory and motor distal conduction velocities could be forecast from presurgical values, whereas the degree of improvement in the symptoms and the functional status after release could not be predicted from the presurgical BQ scores.

Carpal Tunnel Syndrome Prevalence in a Heavy Railroad Maintenance and Repair Facility

1992 ◽  
Vol 36 (10) ◽  
pp. 788-790 ◽  
Author(s):  
T. L. Stentz ◽  
M. W. Riley ◽  
C. L. Glismann ◽  
J. L. Ballard ◽  
R. C. Sposato
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Test Results ◽  
Anthropometric Data ◽  
Maintenance And Repair ◽  
Conduction Velocities ◽  
Volunteer Workers ◽  
Tunnel Syndrome ◽  
Repair Facility

Carpal tunnel syndrome (CTS) is clinically evaluated with the aid of nerve conduction testing. CTS diagnosis is typically confirmed by the presence of higher than normal median nerve distal latencies accompanied by lower than normal conduction velocities depending on the degree of neuropathy. The main objective of this research was to estimate the prevalence of CTS in a population of 800 railroad maintenance workers. A non-random sample of 322 volunteer workers participated in the study. Demographic and anthropometric data was collected. Median nerve distal latencies and conduction velocities were measured on both hands. Based on the test results, subjects were separated into 6 classes of CTS severity from “normal” to “severe”. Data analysis revealed some CTS was present. Analysis of wrist geometry did not confirm wrist squareness as a predictor of CTS.

Slowing of Sensory Conduction of the Median Nerve and Carpal Tunnel Syndrome in Japanese and American Industrial Workers

1994 ◽  
Vol 19 (1) ◽  
pp. 30-34 ◽  
Author(s):  
P. A. NATHAN ◽  
K. TAKIGAWA ◽  
R. C. KENISTON ◽  
K. D. MEADOWS ◽  
R. S. LOCKWOOD
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
The Body ◽  
Industrial Workers ◽  
Factory Workers ◽  
Latency Difference ◽  
Sensory Conduction ◽  
Japanese Workers ◽  
Tunnel Syndrome

As part of a continuing study of the causes of carpal tunnel syndrome (CTS) in industry, we measured sensory conduction of the median nerve in 101 Japanese furniture factory workers. We used the maximum latency difference (MLD) with a critical value of ≥0.40 msec to indicate abnormal slowing of nerve conduction. The prevalence of slowing in the Japanese workers was 17.8%, while the prevalence of probable CTS (based on symptoms only) was 2.5%, and the prevalence of definite CTS (probable CTS confirmed by slowing) was 2.0%. The most important factor predicting the MLD was the body mass index. The MLD was the most important factor predicting probable CTS. The prevalence of slowing in the Japanese workers was not significantly different from the prevalence of slowing in 316 American workers from four industries (22.0%), but the prevalences of probable CTS and definite CTS were much lower in the Japanese. The meaning of these findings is discussed.

Location of Impaired Sensory Conduction of the Median Nerve in Carpal Tunnel Syndrome

1990 ◽  
Vol 15 (1) ◽  
pp. 89-92
Author(s):  
P. A. NATHAN ◽  
H. SRINIVASAN ◽  
LINDA S. DOYLE ◽  
K. D. MEADOWS
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
General Pattern ◽  
Distal Margin ◽  
Sensory Conduction ◽  
Tunnel Syndrome ◽  
Adjacent Segments

Sensory conduction of the median nerve at the carpal tunnel for eight consecutive 1 cm segments of the nerve was evaluated in 217 hands of 153 of our patients with carpal tunnel syndrome. Impairment was found to be highly focal and often confined to a single 1 cm segment of the nerve. The section of the nerve at or just distal to the distal margin of the carpal tunnel was affected most frequently, the section within the tunnel was affected less often, and the section proximal to the tunnel at the level of the mid-carpal and radio-carpal joints was affected least. The greatest contrast between frequencies of slowing at adjacent segments occurred at the proximal and distal margins of the carpal tunnel. The distribution of the nerve impairment was similar between the sexes; however, among the men the segment affected most frequently was located 1 cm distal to the segment affected most frequently among the women. The general pattern of slowing which we found does not substantiate some commonly-held opinions about the aetiology of carpal tunnel syndrome.

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