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Differences in the activity of the muscles in the forearm of individuals with a congenital absence of the hand

Taffler, S.D. and Kyberd, P.J. (2007) Differences in the activity of the muscles in the forearm of individuals with a congenital absence of the hand. IEEE Transactions on Biomedical Engineering, 54 (8). pp. 1514-1519. ISSN 0018-9294

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To link to this item DOI: 10.1109/tbme.2007.9900817

Abstract/Summary

The spectral content of the myoelectric signals from the muscles of the remnant forearms of three persons with congenital absences (CA) of their forearms was compared with signals from their intact contra-lateral limbs, similar muscles in three persons with acquired losses (AL) and seven persons without absences [no loss (NL)]. The observed bandwidth for the CA subjects was broader with peak energy between 200 and 300 Hz. While the signals from the contra-lateral limbs and the AL and NL subjects was in the 100-150 Hz range: The mean skew of the signals from the AL subjects was 46.3 +/- 6.7 and those with NL of 45.4 +/- 8.7, while the signals from those with CAs had a skew of 11.0 +/- 11. The structure of the muscles of one CA subject was observed ultrasonically. The muscle showed greater disruption than normally developed muscles. It is speculated that the myographic signal reflects the structure of the muscle. which has developed in a more disorganized manner as a result of the muscle not being stretched by other muscles across the missing distal joint, even in the muscles that are used regularly to control arm prostheses.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science
ID Code:15394
Uncontrolled Keywords:congenital absence, muscle, prosthetics, spectral analysis, surface, EMG, ultrasound, ELECTROMYOGRAPHIC SIGNAL, MYOELECTRIC SIGNAL, POWER SPECTRUM, FATIGUE, EMG, CONTRACTIONS, FIBERS, USERS

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