In all specimens, a branch of the radial nere supplied the inferolateral fibers of the deep head. 在所有标本中,桡神经的一个分支分布于深头的下方纤维。
The smaller, oblique, deep head has a more anterior insertion on the coronoid, which may facilitate the initiation of elbow flexion from full extension. 小的倾斜的深头的止点位于前方的冠状突,当肘关节处于完全伸直位时,这种结构利于引发肘关节的屈曲。