interosseal

Updated: June 13, 2025

In an athetoid hand, says Starr, the interossei and lumbricales, which flex the metacarpo-phalangeal and extend the phalangeal joints, are affected; rarely are the long extensors and the long flexors affected. Therefore the hand is usually in the so-called interosseal position, with flexion of the proximal and extension of the middle and distal phalanges.

George M. (George Milbrey) Gould - Anomalies and Curiosities of Medicine