part of part of Homo sapiens manual digit 1 manual digit 1 phalanx distal phalanx of manus distal phalanx distal phalanx of manual digit 1 UBERON:0004337 first distal phalanx of hand SCTID:182007006 FMA:23945 distal phalanx of first digit of hand A distal phalanx that is part of a hand digit 1 [Automatically generated definition]. PDP The human pollical distal phalanx (PDP) has a pronounced insertion for the flexor pollicis longus (asymmetric towards the radial side), an ungual fossa, and a pair of dissymmetric ungual spines (the ulnar being more prominent). This asymmetry is necessary to ensure that the thumb pulp is always facing the pulps of the other digits, an osteological configuration which provides the maximum contact surface with held objects. manual digit 1 distal phalanx thumb distal phalanx pollical distal phalanx distal phalanx of thumb distal phalanx of manual digit I distal phalanx of digit 1 manual digit 1 digitopodial skeleton