recent morphometric studies of ulnae of prehistoric skeletal remains from populations known to have used spears , atlatls , and similar projectile weapons for hunting and warfare reveal a high incidence of hypertrophy of the ulnar crest , to which the supinator muscle is attached , along with pronounced depth of the adjacent supinator fossa , especially in the upper extremities of males .
C0041600
ulnae
C1140618
upper extremities