Читать книгу Neurology - Charles H. Clarke - Страница 190

The crux is to distinguish between:

 Generalised thinning, normal in old age and seen in cachexia – power is normal

 Widespread wasting seen in MND, polyneuropathy

 Focal wasting with denervation.

Seek out sites of predilection:

 Small hand muscles (T1)

 Guttering of forearm flexors

 Wasted anterior tibial compartment – lateral to the leading edge of the tibia

 Wasted extensor digitorum brevis muscles – small oyster‐like muscles below each lateral malleolus.

Muscles with normal bulk, consistency and power are usually normal electrophysiologically and histologically.