Multiple forearm muscle variants including a rare hypothenar variant

Kevin R Kelliher*, David Terfe

Abstract

During a routine dissection of the upper extremities we observed multiple muscle variants in the forearm of a male cadaver. Variants of the palmaris longus, flexor pollicis longus and a rare hypothenar muscle were observed bilaterally. The palmaris longus presented as a different variant on either side, a reverse palmaris longus and a bifid palmaris longus. The accessory head of the flexor policis longus was observed in both forearms and a rarely seen accessory hypothenar muscle was found bilaterally.