Variation in Innervation of Lumbricals of Hands

Aim: To study the innervation pattern of lumbricals.

Materials & methods: The study was carried on 54 hands of both sexes of different age groups used for routine dissection in Anatomy department at CHRI. The distribution patterns of the muscular branches of median & ulnar nerve were studied in detail.

Results: In the present study, variations in innervations of lumbriclas from the normal pattern were found. In 3 hands (5.5%), the second lumbrical was solely supplied by a branch from the deep branch of ulnar nerve. The third lumbrical was supplied by median nerve in 1 hand (1.85%), & by both median and ulnar in 4 hands.

Conclusion: Clinican & hand surgeons should be aware of such a variation in innervation of lumbricals during various surgical procedures.