phalanx proximal phalanx 1 UBERON:0004302 uberon phalanx 1 Proximal phalanges are bones found in the limbs of most vertebrates. In humans, they are the bones at the base of a toe or finger, the prominent, knobby ends of which are often called the knuckles. In other vertebrates, proximal phalanges have a similar placement in the corresponding limbs, be they paw, wing or fin. In many species, they are the longest and thickest phalanx ('finger' bone) SCTID:299708005 proximal-most phalanx Proximal-most phalanx within a digit. phalanx I EMAPA:35716 Wikipedia:Proximal_phalanges AAO:0010680 MA:0002916