Head of Proximal Phalanx of Index Finger

Description

The head is the expanded, pulley-shaped, distal end of the proximal phalanx of the index finger. It is the distal continuation of its body and contains a distal articular facet, which articulates with the proximal articular facet of the middle phalanx of the index finger, forming the proximal interphalangeal joint of the index finger.

The head of the proximal phalanx of the index finger provides attachment sites for the collateral, accessory collateral, and palmar ligaments of the proximal interphalangeal joint of the index finger.