Question #101
Which of the following muscles does not have a bony attachment distally?
Palmaris longus arises from the common flexor origin and inserts into the palmar aponeurosis and flexor retinaculum.
The lumbricals are one of the groups of intrinsic hand muscles. They arise from the tendons of flexor digitorum profundus on the palmar aspect. The fibres then take an oblique path, wrapping around the radial aspect of the proximal phalanx to insert into the extensor expansion on the dorsal aspect. Since they arise from flexor digitorum profundus they have a similar nerve supply – the medial two lumbricals are supplied by the ulnar nerve, the lateral two lumbricals are supplied by the median nerve.