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The carpal tunnel formed
anteriorly at wrist by a deep arch formed by
carpal bones & flexor retinaculum
(transverse carpal ligament)
Flexor
Flexor
Flexor
Median
digitorum superficialis
digitorum profundus
pollicis longus
nerve
Pass through the carpal tunnel
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The extensor tendons pass into the hand in six
compartments defined by an extensor
retinaculum:
extensor digitorum & extensor
indicis posterior surface of the wrist
extensor carpi ulnaris & extensor
digiti minimi medial side of the wrist
abductor pollicis longus &
extensor pollicis brevis
extensor carpi radialis longus &
extensor carpi radialis brevis
extensor pollicis longus
through three compartments on
the lateral surface of the wrist.
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A triangular condensation of
deep fascia that covers the
palm and is anchored to the
skin in distal regions.
Continuous with the palmaris
longus tendon, when present;
otherwise, anchored to the
flexor retinaculum.
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Tendons of flexor digitorum
superficialis and profundus cross the
palm
enter fibrous sheaths on the
palmar aspect of the digits.
o formed by fibrous arches and
cruciate (cross-shaped) ligaments
o hold the tendons to the bony
plane
o prevent the tendons from bowing
when the digits are flexed. are
surrounded by a synovial
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Tendons of the extensor digitorum
extensor pollicis longus muscles
expand over the proximal phalanges to
form "extensor hoods" or "dorsal
digital expansions".
Tendons of the extensor digiti minimi,
extensor indicis, extensor pollicis
brevis join these hoods.
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Palmaris brevis
Thenar muscles
Hypothenar muscles
Adductor pollicis
Lumbrical
Abductor
digiti
minimi
Flexor
digiti
minimi
Abductor pollicis brevis
Opponens
pollicis
Flexor pollicis
brevis
Interossei
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Palmar interossei
adduct the thumb, index, ring,
and little fingers with respect
to a long axis through the
middle finger
Dorsal interossei
major abductors of the index,
middle, and ring fingers, at the
metacarpophalangeal joints
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Lumbricals
flexing metacarpophalangeal joints
extending interphalangeal joints
medial two deep branch of the ulnar nerve
lateral two median nerve
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Palmaris brevis
deepens cup of the palm by pulling on
skin over the hypothenar eminence
forming a distinct ridge.
This may improve grip.
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All of the intrinsic muscles of the hand
by deep branch of the ulnar nerve
Except
three thenar & two lateral lumbrical muscles
by median nerve
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Superficial
Deep
palmar arch
palmar arch
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Cephalic vein originates from
lateral side of dorsal venous network.
Basilic vein originates from
medial side of dorsal venous network.
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Ulnar nerve medial side of the palm, medial half of the dorsum of
the hand, the 5th finger, and the medial half of the 4th finger, anterior
surfaces of the medial one and a half digits,
Median nerve thumb,index,middle fingers,lateral side of the ring
[distal parts on the dorsum of the hand]
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Radial nerve dorsolateral side
base of the carpal arch
formed
medially by
pisiform & hook of hamate
laterally by
tubercles of scaphoid & trapezium
SLTP
TTCH
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lateral border
tendons of
abductor pollicis longus APLEPB
extensor pollicis brevis
medial border
tendon of extensor pollicis longus
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floor
scaphoid & trapezium
distal ends of the tendons of
extensor carpi radialis longus
extensor carpi radialis brevis
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