Muscles Origin, Insertion, innervation, Action of Flexor arm and hand

Question 1

Origin and Insertion of Brachioradialis

Answer 1

Origin: Ridge superior to lateral epicondyle of the humerus and lateral intermuscular septum
Insertion: Lateral side of the base of the styloid process of the radius

Question 2

Innervation and Action of Brachioradialis

Answer 2

Innervation: Radial nerve
Action: Flexes the forearm at the elbow

Question 3

Origin and Insertion of Pronator Teres

Answer 3

Origin: Medial epicondyle of humerus, coronoid process of ulna
Insertion: Lateral surface of radius

Question 4

Innervation and Action of Pronator Teres

Answer 4

Innervation: Median nerve
Action: Pronates and Flexes forearm

Question 5

Origin and Insertion of Flexor Carpi Radialis

Answer 5

Origin: Medial epicondyle of humerus
Insertion: Base of 2nd metacarpal and 3rd metacarpal

Question 6

Innervation and Action of Flexor Carpi Radialis

Answer 6

Innervation: Median nerve
Action: Flexion and abduction of hand

Question 7

Origin and Insertion of Palmaris Longus

Answer 7

Origin: Medial epicondyle of humerus
Insertion: Palmar aponeurosis and flexor retinaculum

Question 8

Innervation and Action of Palmaris Longus

Answer 8

Innervation: Median nerve
Action: Flexes hand, tenses flexor retinaculum

Question 9

Origin and Insertion of Flexor Carpi Ulnaris

Answer 9

Origin: Medial epicondyle of humerus and olecranon of ulna
Insertion: Pisiform bone, hook of hamate, and base of metacarpal 5

Question 10

Innervation and Action of Flexor Carpi Ulnaris

Answer 10

Innervation: Ulnar nerve
Action: Flexes wrist, adducts hand

Question 11

Origin and Insertion of Flexor Digitorum Superficialis

Answer 11

Origin: Humeral head: medial epicondyle; ulnar head: coronoid process; radial head: below radial tuberosity
Insertion: Middle phalanx of digits 2-5

Question 12

Innervation and Action of Flexor Digitorum Superficialis

Answer 12

Innervation: Median nerve
Action: Flexes wrist, flexes middle and proximal phalanxes of 2-5

Question 13

Origin and Insertion of Flexor Digitorum Profundis

Answer 13

Origin: Proximal three-fourths of the anterior and medial surfaces of the ulna and interosseous membrane
Insertion: Base of palmar surface of distal phalanxes 2-5

Question 14

Innervation and Action of Flexor Digitorum Profundis

Answer 14

Innervation: Interosseous branch of medial and ulnar nerves
Action: Flexes wrist

Question 15

Origin and Insertion of Flexor Pollicis Longus

Answer 15

Origin: Anterior surface of radius and interosseous membrane
Insertion: Base of distal phalanx of thumb

Question 16

Innervation and Action of Flexor Pollicis Longus

Answer 16

Innervation: Interosseous branch of median nerve
Action: Flexes distal phalanx of thumb

Question 17

Origin and Insertion of Pronator Quadratus

Answer 17

Origin: Distal fourth of anterior surface of ulna
Insertion: Distal fourth of anterior surface of radius

Question 18

Innervation and Action of Pronator Quadratus

Answer 18

Innervation: Interosseous branch of median nerve
Action: Pronates hand