Wasting of First Dorsal Interossei (small muscles of hand)


In the picture above, you can see a depression in the first web space (between thumb and index finger). This is suggestive of wasting of first dorsal interosseous (FDI) muscles. This patient had bilateral C8-T1 lesion. Small muscle wasting can have varied localizations: Lower cervical cord lesion, anterior horn cell disease, C8-T1 root lesion, lowerContinue reading “Wasting of First Dorsal Interossei (small muscles of hand)”