BoneLong bone
Middle phalanx of the middle
Latin: Phalanx media sinistra
Location: Hand — digits
Paired structure: one on the left and one on the right side of the body.
View the middle phalanx of the middle in 3DFunction
The finger's middle segment, hinged between PIP and DIP joints; the flexor digitorum superficialis inserts on its palmar base.
Landmarks
- Base
- Shaft
- Head
- Palmar ridge (flexor sheath)
Articulations (joints)
- Proximal phalanx of the middle
- Next phalanx distally
Clinical relevance
Central-slip injuries at the middle phalanx's base produce boutonniere deformity — the PIP juts through a torn extensor hood.
Educational anatomy reference, not medical advice. About this content.