palmaris longus

The tendon in which might have been used for throwing spears, it is a weak flexor, and provides no substantial flexing force that would inhibit movement in the wrist if its tendon were cut and moved elsewhere. often used for replacing other tendons, there is evidence that humans are evolving to not have it

P1: yo, P2? where is your palmaris longus
P2: What?
P1: The thing on your wrist when you do hand butt cheeks
P2:oh, the doctor had to use it to replace another tendon