Summary Forearm muscle chart

Muscles Proximal Attachment Distal Attachment Innervation Action
ANTERIOR COMPARTMENT
ulnar head: coronoid
process humeral head:
Middle convexity of lateral
Pronator Teres medial epicondyle of Median N (C6, C7) pronates and flexes arm at elbow
surface of radius
humerus (common flexor
origin)


Flexor Carpi medial epicondyle of humerus
base of 2nd metacarpal Median N (C6, C7) flexes and abducts the hand at the wrist
Radialis (FCR) (common flexor origin)



distal half of flexor
medial epicondyle of humerus flexes hand at wrists and tenses palmar
Palmaris longus retinaculum and apex of Median N. (C7, C8)
(common flexor origin) aponeurosis
palmar aponeurosis

humeral head: medial
epicondyle of humerus
Flexor Carpi (common flexor origin) pisiform, hook of hamate,
Ulnar N. (C7, C8) flexes and adducts the hand at the wrist
Ulnaris (FCU) Ulnar head: olecranon and 5th metacarpal
posterior border of ulna via
aponeurosis
humero-ulnar head: medial flexes middle phalanges at the proximal
flexor digitorum epicondyle of humerus shafts of middle interphalangeal joints of middle 4 digits;
superficialis (common flexor origin) phalanges of medial 4 Median N. (C7, C8, T1) acting more strongly, it also flexes
(FDS) Radial head: superior half digits proximal phalanges at
of anterior border metacarpophalangeal joints.
medial part: bases of
Medial part: Ulnar N. Medial Part: flexes the distal
distal phalanges of 4th
proximal 3/4 of the medial (C8, T1) Lateral part: phalanges 4 and 5 at distal
Flexor Digitorum and 5th digits lateral
and anterior surfaces of ulna Anterior Interosseous interphalangeal joints lateral part:
Profundus (FDP) part: bases of distal
and interosseous membrane N from the Medial N. flexes the distal phalanges 2 and 3 at
phalanges of 2nd and
(C8, T1) distal phalangeal joints
3rd digits