Changes in macro electromyography over time in patients with a history of polio: a comparison of 2 muscles.

Abstract:

OBJECTIVE:To investigate whether changes over time are different in a weight-bearing leg muscle than in a less heavily used arm muscle. DESIGN:Prospective study. SETTING:University hospital laboratory. PARTICIPANTS:Twenty-three patients with a history of poliomyelitis. INTERVENTION:Two investigations were performed 5 years apart, using macro electromyography and the patients' own assessments of symptoms in the tibial anterior and the biceps brachii muscles. Test-retest of macro electromyography was performed in controls and in patients with old polio. MAIN OUTCOME MEASURES:Macro motor unit potential (MUP) and symptoms in the tibial anterior and biceps brachii over time. RESULTS:The macro MUP amplitude increased by 24% (P<.05) in the tibial anterior but was unchanged in the biceps brachii muscle. CONCLUSIONS:An increase in the macro MUP amplitude of the tibial anterior muscle, but not of the biceps brachii, most likely indicates a more pronounced ongoing denervation-reinnervation process over time in the tibial anterior. This difference could be activity dependent, but other factors cannot be excluded.

journal_name

Arch Phys Med Rehabil

authors

Sandberg A,Stålberg E

doi

10.1016/j.apmr.2003.08.101

subject

Has Abstract

pub_date

2004-07-01 00:00:00

pages

1174-82

issue

7

eissn

0003-9993

issn

1532-821X

pii

S0003-9993(03)01128-6

journal_volume

85

pub_type

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