Muscle Charts of the Anterior Forearm




Muscle Charts of the Anterior Forearm

 

The muscles discussed in this section are as follows:

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Flexor carpi radialis

Palmaris longus

Flexor carpi ulnaris

Flexor digitorum superficialis

Flexor digitorum profundus

Flexor pollicis longus

Pronator teres

Pronator quadratus

Helpful Hints:

flexor carpi radialis – (flex = reduce angle; carpi = wrist; radi = radius)
palmaris longus – (palma = palm; longus = long)
flexor carpi ulnaris – (ulnar = ulna)
flexor digitorum superficialis – (digit = finger; superficial = near the surface)
flexor digitorum profundus – (profund = deep)
flexor pollicis longus – (pollex = thumb)
pronator teres – (pronate = to turn down; teres = round)
pronator quadratus – (quad = four sided)

The muscles of the forearm are a difficult area to study due to their smaller size and their close proximity to one another. However, after study of the intricacies of forearm muscle anatomy one gains a new respect for the muscles that allow us to have such dexterity in our hands. The muscles of the anterior forearm include many muscles involved in wrist flexion, and flexion of the metacarpophalangeal and interphalangeal joints of the fingers. Just as the extensors of the forearm originated near, or on, the lateral epicondyle of the humerus, the flexor muscles of the forearm all originate near, or on, the medial epicondyle of the humerus.

Origin:

Flexor carpi radialis – This muscle originates from the medial epicondyle of the humerus.
Palmaris longus – This muscle originates from the medial epicondyle of the humerus.
Flexor carpi ulnaris – This muscle originates from the medial epicondyle of the humerus, the olecranon process, and the proximal 2/3 dorsal border of the ulna.
Flexor digtorum superficialis – This muscle originates from the medial epicondyle of the humerus, the coronoid (not corocoid) process of the ulna, and the medial line of the radius.
Flexor digitorum profundus – This muscle originates from the proximal 3/4 shaft of the ulna, and the coronoid process of the ulna.
Flexor pollicis longus – This muscle originates from the anterior surface of the radius, the coronoid process of the ulna, and the medial epicondyle of the humerus.
Pronator teres – This muscle originates from the medial epicondyle of the humerus, and the coronoid process of the ulna.
Pronator quadratus – This muscle originates from the distal ulna.

Insertion:

Flexor carpi radialis – This muscle inserts onto the base of metacarpals 2 and 3.
Palmeris longus – This muscle inserts onto the palmar aponeurosis.

Flexor carpi ulnaris – This muscle inserts onto the pisiform and hamate carpal bones, and the base of the metacarpal 5.
Flexor digitorum superficialis – This muscle inserts onto the second (middle) phalanx of the four lesser fingers (digits 2-5).
Flexor digitorum profundus – This muscle inserts onto the base of the third (distal) phalanx of the four lesser fingers (digits 2-5)
Flexor pollicis longus – This muscle inserts onto the base of distal phalanx of the thumb (pollex).
Pronator teres – This muscle inserts onto the lateral mid-shaft of the radius.
Pronator quadratus – This muscle inserts onto the distal radius.

Action:

Flexor carpi radialis – The action of this muscle includes elbow joint flexion; also wrist joint flexion and abduction.
Palmaris longus – The action of this muscle includes wrist flexion.
Flexor carpi ulnaris – The action of this muscle includes wrist flexion and adduction.

Flexor digitorum superficialis – The action of this muscle includes flexion of the metacarpophalangeal joint and proximal interphalangeal joint of the four lesser fingers; also wrist flexion.

Flexor digitorum profundus – The action of this muscle includes flexion of the metacarpophalangeal joint, and flexion of the proximal and distal interphalangeal joints of the four lesser fingers; also wrist flexion.

Flexor pollicis longus – The action of this muscle includes metacarpophalangeal and interphalangeal joint flexion of the thumb (pollex). (Remember that the pollex and hallux are composed of only two phalanx bones, therefore having only one interphalangeal joint)

Pronator teres – The action of this muscle includes elbow flexion, and radioulnar pronation.
Pronator quadratus – The action of this muscle includes radioulnar pronation.

Charts of Forearm

large-anterior forearm muscles

muscles of the arm such as the biceps brachii have what innervation

pdf-muscle-anatomy-greys-anatomy

poster-anterior forearm muscles

printable-chart-anterior forearm muscles

superficial-anterior-muscles-of-the-forearm chart

forearm anatomy chart

chart-arm-anatomy-human-anatomy

download-free-anterior forearm muscles




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