Flexor Muscles of Arm

Question 1

Pronator teres

Answer 1

Origin: Medial epicondyle, coronoid process ulna

Insertion: Lateral surface midshaft radius

Actions: Pronation forearm

Innervation: Median nerve (C6,C7)

Question 2

Palmaris longus

Answer 2

Origin: Medial epicondyle (CFT)

Insertion: Plantar aponeurosis

Actions: Flexion hand

Innervation: Median nerve (C7,C8)

Question 3

Flexor carpi radialis

Answer 3

Origin: Medial epicondyle (CFT);

Insertion: Base 2nd metacarpal (3rd)

Actions: Flexion/radial deviation

Innervation: Median nerve (C6,C7)

Question 4

Flexor carpi ulnaris

Answer 4

Origin: Medial epicondyle (CFT); Proximal 2/3 post. ulna

Insertion: Pisiform bone

Actions: Flexion/ulnar deviation

Innervation: Ulnar nerve (C8, T1)

Question 5

Flexor digitorum superficialis

Answer 5

Origin: Medial epicondyle (CFT)

Medial aspect coronoid ulna

Proximal 2/3 radius distal radial tuberosity

Insertion: Base middle phalanx 4 medial fingergs/digits

Actions: Flex middle/proximal phalanges

Flexion hand

Innervation: Medial nerve (C7-T1)

Question 6

Flexor digitorum profundas

Answer 6

Origin: Ant./med. surface proximal 2/3 ulna

Int. membrane; aponeurosis flexor carpi ulnaris

Insertion: Distal phalanx medial 4 digits

Actions: Flex distal->middle->proximal phalanges

Flexion hand

Innervation: Median/ulnar nerves (C8, T1)

Question 7

Flexor pollicis longus

Answer 7

Origin: Ant. surfaces middle 1/2 radius/adjacent int. mem

Insertion: Distal phalanx thumb

Actions: Flexion distal phalanx thumb

Innervation: Median nerve (C8,T1)

Question 8

Pronator quadratus

Answer 8

Origin: Distal 1/4 ulna

Insertion: Distal part radius

Actions: Pronation forearm

Innervation: Median nerve (C8, T1)