Trochlea of Hand Phalanx Anatomy in 3D

The "Hinge" of the finger bones. A "Boutonniere Deformity" is caused by a tear of the tendon over this trochlea, making it impossible to straighten the finger.

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Related structures

Hand Proximal Phalanx (Third Finger) Body of Hand Phalanx Head of Phalanx of Hand Trochlea of Foot Phalanx Abductor Digiti Minimi of Hand (Proximal Phalanx of Fifth Finger of Hand Insertion) Adductor Pollicis (Proximal Phalanx of First Finger of Hand Insertion) Extensor Digitorum (Proximal Phalanx of Second Finger of Hand Insertion) Extensor Digitorum (Third Finger Proximal Phalanx insertion)