Distal phalanx of the thumb

Phalanx distalis digiti I manus

SkeletalSkeletonArmLeft and right

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What it is
Distal phalanx of the thumb, ending in a rough tuft that supports the fingertip pulp and nail.
Function
Forms a lever of the finger moved by the long flexor and extensor tendons.
Size
≈ 21 mm long
Clinical note
Crush injuries of the fingertip commonly fracture the distal tuft.

Nearby skeletal structures Distal phalanx of the index finger, First metacarpal, Middle phalanx of the index finger, Middle phalanx of the middle finger, Proximal phalanx of the index finger, Proximal phalanx of the middle finger, Proximal phalanx of the ring finger, Proximal phalanx of the thumb, Second metacarpal, Third metacarpal