base of phalanx

base of pha·lanx

the expanded proximal end of each phalanx in the hand or foot that articulates with the head of the next proximal bone in the digit.
Synonym(s): basis phalangis
References in periodicals archive ?
The weak belly extends slightly less than the distal third of the bone and inserts by a short tendon on the ventromedial surface of the base of phalanx I of digit II.
The slender tendon passes through the foramen vasculare distale between the trochleae for digits III and IV, and inserts on the medial surface of the base of phalanx 1, digit IV.
The short tendon inserts on the ventrolateral corner of the base of phalanx 1, digit IV.