Download extensor pollicis brevis

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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 digitorum/superficialis
Flexor pollicis longus
Median 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 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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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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Homework:
1. Which structures pass through the carpal tunnel and their anatomical relationships with each
other in the tunnel?
2. The incidence of carpal tunnel syndrome in the world and/or in Turkey?
3. The risk factors, higher in whom? Any gender disperancies in its incidence?
Please send answers to [email protected]
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