Physiology – MCQ 43 – Features suggest denervation in electromyography

On electromyography, all of the following features suggest denervation, except:
a) Unrgulated firing of individual muscle fibres
b) Small short-duration polyphasic action potentials
c) Presence of positive sharp waves
d) Spontaneous firing of motor units

Correct answer : b) Small short-duration polyphasic action potentials