| Document ID (ISN) | 74806 |
| CIS number |
00-879 |
| ISSN - Serial title |
0340-2444 - Zeitschrift für Arbeitswissenschaft |
| Year |
1999 |
| Convention or series no. |
|
| Author(s) |
Schnoz M., Läubli T., Weiss J.A., Krueger H. |
| Title |
Activation of the finger and trapezius muscles in repetitive short and long term finger movements |
| Original title |
Aktivierung der Finger- und Trapezmuskulatur bei repetitiven Kurz- und Langzeit-Fingerbewegungen [in German] |
| Bibliographic information |
Aug. 1999, Vol.53, No.2, p.131-138. Illus. 21 ref. |
| Abstract |
Nine persons aged between 24 and 39 were examined for muscle activity in key operations in order to study the exertion of finger, upper arm and neck muscles during repetitive work. The subjects tapped with the index finger at different frequencies on a rigid key, first during 8s, then for the longest possible time. Surface electromyogramme (EMG) signals from six muscles were measured during maximum voluntary contraction, relaxation and key operation. The force applied to the key was also recorded. Static contraction was found to be present during fast tapping, slow tapping and relaxation in the finger musclesand trapezius but not in the upper arm muscles. Phasic co-activity became significant with time in the trapezius. Incomplete trapezius relaxation could be a reason for work-related neck pain. |
| Descriptors (primary) |
muscular strength; keyboard operations; musculoskeletal diseases |
| Descriptors (secondary) |
muscle testing; repetitive work; electromyography; neck disorders; fingers |
| Document type |
D - Periodical articles |
| Country / State or Province | Germany |
| Subject(s) |
Occupational physiology
|
| Broad subject area(s) |
Physiology, ergonomics
|
| Browse category(ies) |
Diseases of the musculoskeletal system
Office work
|
