Muscle
Palmaris longus
Absent in ~10–15% of people
High-yield
Frequently absent; harvested for tendon grafts. Tensor of the palmar aponeurosis. Median nerve.
Overview
A slender, often-absent superficial flexor whose tendon tents the skin over the wrist and blends into the palmar aponeurosis.
Reference facts
- Origin
Medial epicondyle of the humerus (common flexor origin)
- Insertion
Flexor retinaculum and palmar aponeurosis
- Action
Tenses the palmar aponeurosis and weakly flexes the wrist
- Innervation
Median nerve (C7, C8)
- Blood supply
Ulnar artery