318
UNIT TWO
Flexors
The
flexor carpi radialis
(flek
sor kar-pi
ra
de-a
lis) is
a fl
eshy muscle that runs medially on the anterior side of
the forearm. It extends from the distal end of the humerus
into the hand, where it is attached to metacarpal bones. The
exor carpi radialis fl exes the wrist and abducts the hand
(see F
g. 9.32).
The
flexor carpi ulnaris
(flek
sor kar-pi
ul-na
ris) is
located along the medial border of the forearm. It connects
the distal end of the humerus and the proximal end of the
table 9.9
concern these muscles. The muscles that move the
hand include the following:
Flexors
Extensors
±lexor carpi radialis
Extensor carpi radialis
±lexor carpi ulnaris
longus
Palmaris longus
Extensor carpi radialis
±lexor digitorum profundus
brevis
±lexor digitorum
Extensor carpi ulnaris
superF cialis
Extensor digitorum
Triceps brachii
Flexor carpi ulnaris
Extensor carpi ulnaris
Extensor digitorum
Extensor
carpi ulnaris
Extensor retinaculum
Extensor carpi
radialis brevis
Extensor carpi
radialis longus
Brachioradialis
Extensor
digitorum
Extensor carpi
radialis longus
and brevis
(a)
(b)
(c)
FIGURE 9.33
Muscles of the arm and forearm. (
a
) Muscles of the posterior forearm. (
b
and
c
) Isolated views of muscles associated with the
posterior forearm.
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