Phalanges of Foot
Phalanges of toes in general resemble those of fingers of hands. There are two phalanges in the big toe and three in each of the remaining toes. Occasionally, the little toe also consists only of two phalanges.
General structure of phalanges of foot:
Generally, the phalanges of toes are musch shorter than their counterparts in hands. Their shafts are compressed from side to side. In the proximal phalanges, their is a plantar concavity. Middle phalanges are small and short but broader than the proximal phalanges. Distal phalanges resemble those in the fingers but are much smaller and flatter.
Blood supply of phalanges of foot:
The proximal phalanges receive most of their blood supply from the dorsal digital arteries. The middle phalanges are supplied by plantar and dorsal digital arteries. Distal phalanges receive their supply mainly from plantar digital arteries.
Nerve Supply to phalanges of foot:
The phalanges are innervated by the plantar and dorsal digital nerves.
Ossification of phalanges of foot:
Phalanges ossifiy from two centers of ossification: one for the shaft and one for the basal epiphysis. Primary centres for the distal phalanges appear between the ninth and twelfth prenatal weeks, and even later in the fifth digit. Primary centres for the proximal phalanges appear between the eleventh and fifteenth weeks, and later for intermediate phalanges, but there is wide variation.
The centers for ossification of basal epiphyses appear between second and eighth years. They unite by the eighteenth year, however, considerable variation does exist.