The abductor minimi digiti - named from its action - is fusiform and somewhat flattened.
- The lower half of the pisiform bone ;
- the continuation of the tendon of the flexor carpi ulnaris below this bone.
- The ulnar side of the base of the first phalanx of the little finger ;
- and the adjacent portion of the aponeurosis of the extensor minimi ligiti.
Arising by short tendinous fibres, it soon forms a flat fleshy mass I which contracts slightly below, and just before its insertion, having again become tendinous, it is for the most part attached to the first phalanx, but it also sends a Ismail slip backwards to the extensor aponeurosis.
From the ulnar nerve through the eighth cervical nerve. It receives small filaments at the outer and deep aspect, usually from the deep palmar division of the ulnar nerve.
Superficially, the hypothenar part of the palmar fascia and the palmaris brevis ; deeply, the flexor brevis and opponens minimi digiti. Upon its radial border are placed the deep palmar branches of the ulnar artery and nerve.