WristandHand
Plate451
FlexorandExtensorTendonsinFingers
Insertion of central band of extensor
tendon to base of middle phalanx
Triangular aponeurosis
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
Interosseous
tendon slip
to lateral band
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
(volar plate)
Flexor digitorum
superficialis tendon (
cut
)
Collateral ligaments
Flexor digitorum
profundus tendon (
cut
)
Palmar ligament (volar plate)
Interosseous muscles
Lumbrical muscle
Note: Black arrows indicate
pull of long extensor tendon;
red arrows indicate pull
of interosseous and
lumbrical muscles; dots
indicate axis of
rotation of joints.
See±also±
Plate 445
±
