Finger Articulations

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Metacarpophalangeal Flexion Bending the joint resulting in a decrease of angle; moving the base of the fingers toward the palm of the hand. Flexor digitorum profundus Flexor digitorum superficialis Flexor digiti minimi Abductor digiti minimi Interossei Lumbricals Extension / Hyperextension Straightening the joint resulting in an increase of angle; moving the base of the fingers away from the palm of the hand. Extensor digitorium (middle & ring fingers) Extensor digiti minimi Extensor indicis   Adduction Medial movement toward the axial line; movement of the fingers toward the middle finger. Palmar interossei (in the extended finger) Flexor digitorum superficialis Flexor digitorum profundus   Abduction Lateral movement away from the axial line; movement of the fingers away from the middle finger. Dorsal interosssei (in the extended finger) Extensor digitorum Extensor digiti minimi Extensor indicis Abductor digiti minimi   Interphalangeal Flexion Bending the joint resulting in a decrease of angle; moving the distal two segments of the fingers toward the base of the fingers. Flexor digitorum profundus Flexor digitorum superficialis (proximal joint only)   Extension Straightening the joint resulting in an increase of angle; moving the distal two segments of the fingers away from the base of the fingers. Extensor digitorum Extensor digiti minimi Extensor indicis Lumbricals Interossei   Notes See Wrist for midcarpal joints. Also see Thumb.