flexors of forearm (muscles of anterior compartment of forearm)

Question 1

Superficial Layer

Answer 1

all innervated by median nerve except for flex carpi ulnas (ulnar nerve )

Question 2

Flexor carpi (wrist) Radialis

Answer 2

• *function** : flexes and abducts hand at wrist
• *attachments**: proximal: medial epicondyle of humerous
• *distal**: base of 2nd (3rd) metacarpal
• *nerve supply**: median nerve, c6,c7

Question 3

Pronator Terres

Answer 3

function: pronates forearm and flexes elbow joint

attachments:

proximal : ulnar head : coronoid process of ulna

humeral head : medial supraconylar ridge of humerus

distal : middle convexity of lateral surface of radius

nerve supply : median nerve (c6,c7)

Question 4

Palmaris Longus

Answer 4

Function : flexes hand at wrist and tenses palmar aponeurosis

Attachments:

Proximal : medial epicondyle of humorous

Distal : palmar aponeurosis (deep fascia of palm)

Nerve supply : median nerve (c7,c8)

Question 5

Flexor Carpi Ulnaris

Answer 5

Function: flexes and adducts hand at wrist

Attachments

Proximal : olecranon and posterior borer of ulna (via aponeurosis)

Distal: Pisiform, hook of hamate, 5th metacarpal

Nerve supply: ulnar nerve (c7,c8)

Question 6

Intermediate Layer

Question 7

Flexor Digitorum Superficialis

Answer 7

Function : flexion of the digits 2-5 at both the metacarpophalangeal and proximal interphalangeal joints

Attachments

Proximal: Humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna

Radial head: oblique line of radius

Distal : sides of middle phalanges 2-5

Nerve Supply: median nerve (c7,c8,t1)

Question 8

Deep Layer

Answer 8

have no elbow flexion (first two layers do)

supplied by anterior interosseous nerve from median nerve

Question 9

Flexor Pollicis Longus

Answer 9

Function : Flexes wrist joint, carpometacarpal joints

Flexes metacarpophalangeal and interphalangeal joints of thumb

Attachments:

Proximal : anterior surface of radius and adjacent interosseous membrane

Distal: base of distal phalanx of thumb

Nerve supply : anterior interosseous nerve, from median nerve, (c8, t1)

Question 10

Pronator Quadratus

Answer 10

Function : Pronates forearm

Attachment

Proximal: distal quarter of anterior surface of ulna

Distal : Distal quarter of anterior surface of radius

No nerve supply

Question 11

Flexor digitorum Profundus

Answer 11

Function: Flexes wrist joint, carpometacarpal joints

Flexes distal interphalangeal joints of digits 2, 3, 4, and 5; assists with wrist flexion

Attachments

Proximal: Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane

Distal : Bases of distal phalanges of 2nd, 3rd, 4th and 5th digits

Nerve supply: Lateral part (to digits 2 and 3): median nerve (C8, T1) (anterior interosseous branch)

runs deeper to phalanges than superficialis (intermediate layer)

Medial part (to digits 4 and 5): ulnar nerve (C8, T1)