Flexor and Extensor Tendons in
Fingers Anatomy
Insertion of central band of extensor tendon
to base of middle phalanx, Slips of long extensor tendon to lateral bands, Extensor
expansion (hood), Long extensor tendon, Interosseous muscles, Metacarpal bone
Posterior (dorsal) view, Insertion on extensor tendon to base of distal phalanx,
Lateral bands, Lumbrical muscle, Part of interosseous tendon passes to base of
proximal phalanx and joint capsule, Extensor expansion (hood), Long extensor
tendon, Metacarpal bone, Interosseous muscles, Lumbrical muscle, Flexor
digitorum profundus tendon, Lateral band, Central band, Insertion of extensor
tendon to base of middle phalanx, Insertion of extensor tendon to base of
distal phalanx,
Finger in extension: lateral (radial)
view, Collateral ligaments, Vinculum breve, Vincula longa, Flexor digitorum superficialis
tendon, Collateral ligament, Extensor tendon, Insertion of small deep slip of
extensor tendon to proximal phalanx and joint capsule, Attachment of
interosseous muscle to base of proximal phalanx and joint capsule, Insertion of
lumbrical muscle to extensor tendon.
Finger in flexion: lateral (radial)
view, Palmar ligament (palmar plate), Flexor digitorum superficialis tendon (cut),
Collateral ligaments, Flexor digitorum profundus tendon (cut), Palmar
ligament (palmar plate), Interosseous muscles, Lumbrical muscle
Note: Black arrows indicate pull of
extensor tendon; red arrows indicate pull of interosseous and lumbrical
muscles; dots indicate axis of rotation of joints.
