Motor System Appearance

Note: - any asymmetry or deformity

- muscle wasting "1 If in doubt, measure circumference at fixed distance

- muscle hypertrophy j above/below joint. Note muscle group involved.

- muscle fasciculation - irregular, non-rhythmical contraction of groups of motor units, increased after exercise and on tapping muscle surface.

N.B. Fasciculation may occur in normal individuals, particularly in the orbicularis oculi. Distinguish from 'fibrillation', which is excessive activity of a single motor unit and is only detectable with electromyography except in the tongue.

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