Exam 2

Question 1

Brachioradialis
Origin:
Insertion:
Innervation:

Answer 1

Origin: Proximal 1/3 of Lateral Supracondylar Ridge of the Humerus
Insertion: Lateral side of Styloid process of the radius
Innervation: Radial nerve (C5, C6)

Question 2

Extensor Carpi Ulnaris
Origin:
Insertion:
Innervation:

Answer 2

Origin: Lateral epicondyle of Humerus via common extensor tendon and posterior middle 1/3 of ulna
Insertion: Posterior side of the base of 5th metacarpal on ulnar side
Innervation: Radial nerve (Posterior interosseous nere, C7, C8)

Question 3

Extensor Carpi Radialis
Origin:
Insertion:
Innervation:

Answer 3

Origin: Lateral epicondyle of humerus via common extensor tendon
Insertion: Posterior side of base of 3rd metacarpal on radial side
Innervation: Radial nerve (posterior interosseous nerve, C7, C8)

Question 4

Extensor Carpi Radialis Longus
Origin:
Insertion:
Innervation:

Answer 4

Origin: Distal 1/3 of lateral supracondyular ridge of humerus
Insertion: Posterior side of base of 2nd metacarpal on radial side
Innervation: Radial nerve (C5, C6)

Question 5

Extensor Indicis
Origin:
Insertion:
Innervation:

Answer 5

Origin: Distal 1/3 and interosseous membrane
Insertion: Ulnar side of tendon of extensor digitorum muscle and index finger
Innervation: Radial nerve (Posterior interosseous nerve, C7, C8)

Question 6

Extensor Pollicis Longus
Origin:
Insertion:
Innervation:

Answer 6

Origin: Middle 1/3 and adjacent interosseous membrane of posterior ulna
Insertion: Thumb via its dorsal digital expansion onto posterior surface of distal phalanx of thumb
Innervation: Radial nerve (posterior interosseous nerve, C7, C8)

Question 7

Extensor Pollicis Brevis
Origin:
Insertion:
Innervation:

Answer 7

Origin: Distal 1/3 and adjacent interosseous membrane of posterior radius
Insertion: Posterolateral base of proximal phalanx of thumb
Innervation: Radial nerve (posterior interosseous nerve, C7, C8)

Question 8

Abductor Pollicis Longus
Origin:
Insertion:
Innervation:

Answer 8

Origin: Middle 1/3 of posterior Radius, ulna, and interosseous membrane
Insertion: Lateral side of base of thumb
Innervation: Radial nerve (posterior interosseous nerve, C7, C8)

Question 9

Pronator teres
Origin:
Insertion:
Innervation:

Answer 9

Origin:
Humeral head: Medial epicondyle of humerus and medial supracondylar ridge
Ulnar head: Coronoid process of ulna, medial surface
Insertion: Middle 1/3 of lateral radius
Innervation: Median nerve (C6, C7)

Question 10

Pronator Quadratus
Origin:
Insertion:
Innervation:

Answer 10

Origin: Distal 1/4 of anterior distal ulna
Insertion: Distal 1/4 of anterior distal radius
Innervation: Median nerve (anterior interosseous nerve, C7, C8)

Question 11

Supinator
Origin:
Insertion:
Innervation:

Answer 11

Origin: Supinator crest of ulna, lateral epicondyle of humerus and proximal ulna
Insertion: Proximal 1/3 of posterior lateral and anterior sides of radius
Innervation: Radial nerve (C6, C7)

Question 12

Anconeus
Origin:
Insertion:
Innervation:

Answer 12

Origin: Lateral epicondyle of humerus
Insertion: Lateral side of olecranon process and proximal 1/4 of posterior ulna
Innervation: Radial nerve (C6, C7, C8)

Question 13

Brachialis
Origin:
Insertion:
Innervation:

Answer 13

Origin: Distal 1/2 of anterior shaft of humerus
Insertion: Ulnar tuberosity and coronoid process of ulna
Innervation: Musculocutaneous nerve (C5, C6) and Radial N (C7)

Question 14

Flexor Carpi Radialis
Origin:
Insertion:
Innervation:

Answer 14

Origin: Medial epicondyle of humerus via common flexor tendon
Insertion: Anterior side of bases of 2nd and 3rd metacarpals on radial side
Innervation: Median N (C6, C7)

Question 15

Palmaris longus
Origin:
Insertion:
Innervation:

Answer 15

Origin: Medial epicondyle of humerus via common flexor tendon
Insertion: Palmar aponeurosis and flexor retinaculum of hand
Innervation: Median N (C7, C8)

Question 16

Flexor Pollicis longus
Origin:
Insertion:
Innervation:

Answer 16

Origin: Anterior surface of radius and interosseous membrane, medial epicondyle of humerus, coronoid process of ulna
Insertion: Anterior aspect of base of thumb
Innervation: Median nerve (anterior interosseous branch of median n, C7, C8)

Question 17

Flexor digitorum profundus
Origin:
Insertion:
Innervation:

Answer 17

Origin: Proximal 1/2 of medial and anterior ulna, and interosseous membrane
Insertion: Distal phalanges of anterior surfaces of fingers 2-5
Innervation: Median and ulnar nerves (C8, T1, anterior interosseous branch of median nerve)

Question 18

Flexor Carpi Ulnaris
Origin:
Insertion:
Innervation:

Answer 18

Origin: Medial epicondyle of humerus via common flexor tendon and posterior proximal 2/3 f of ulna
Insertion: Pisiform, hook of hamate, base of 5th metacarpal on anterior hand on ulnar side
Innervation: Ulnar n (C7, C8)

Question 19

Flexor digitorum superficialis
Origin:
Insertion:
Innervation:

Answer 19

Origin:
Humeroulnar head: Medial epicondyle of hyumerus and coronoid process of ulna
Radial head: Proximal 1/2 of anterior shaft of radius
Insertion: Anterior surfaces of fingers 2-5
Innervation: Median N (C7, C8, T1)

Question 20

Extensor Digitorum
Origin:
Insertion:
Innervation:

Answer 20

Origin: Lateral epicondyle of humerus via common extensor tendon
Insertion: Phalanges of fingers 2-5 via dorsal digital expansion onto posterior surfaces middle/distal. phalanges
Innervation: Radial n (Posterior interosseous n, C7, C8)

Question 21

Adductor pollicis
Origin:
Insertion:
Innervation:

Answer 21

Origin:
Oblique head: Anterior bases of 2nd and 3rd metacarpals and capitate
Transverse head: Distal 2/3 of anterior surface of 3rd metacarpal
Insertion:
Oblique head: Medial side of base of proximal phalans and dorsal digital expansion
Transverse head: Medial side of base of proximal phalanx
Innervation: Ulnar n (C8, T1)

Question 22

Abductor Pollicis brevis
Origin:
Insertion:
Innervation:

Answer 22

Origin: Flexor retinaculum and tubercle of scaphoid and trapezium
Insertion: Proximal phalanx of thumb on radial side
Innervation: Median N (C8, T1)

Question 23

Flexor Pollicis Brevis
Origin:
Insertion:
Innervation:

Answer 23

Origin: Flexor retinaculum and Trapezium
Insertion: Radial side of base of proximal phalanx of thumb
Innervation: Median (superficial head) and Ulnar N (deep head) (C8, T1)

Question 24

Abductor digiti mini manus
Origin:
Insertion:
Innervation:

Answer 24

Origin: Pisiform and tendon of flexor varpi ulnaris
Insertion: Ulnar side of base of proximal phalanx and dorsal digital expansion of little finger
Innervation: Ulnar n (C8, T1)

Question 25

Opponens Pollicis Origin: Insertion: Innervation:

Answer 25

Origin: Flexor retinaculum and tubercle of trapezium Insertion: Anterior surface and radial border of thumb Innervation: Medial and Ulnar n (C8, T1)

Question 26

Lumbricals manus Origin: Insertion: Innervation:

Answer 26

Origin: Distal tendon of flexor digitorum profundus Insertion: Distal tendon of extensor digitorum Innervation: Median and ulnar N (C8, T1)

Question 27

Opponens digiti minimi Origin: Insertion: Innervation:

Answer 27

Origin: flexor retinaculum and hook of hamate Insertion: Anterior surface and medial border of little finger Innervation: Ulnar N (C8, T1)

Question 28

Flexor digiti minimi Origin: Insertion: Innervation:

Answer 28

Origin: Flexor retinaculum and hook of hamate Insertion: Ulnar side of base of proximal phalanx of little finger Innervation: Ulnar nerve (C8, T1)

Question 29

Palmar interossei Origin: Insertion: Innervation:

Answer 29

Origin: Anterior side and on middle finger side of metacarpals Insertion: digital expansion Innervation: Ulnar N (C8, T1, deep branch of ulnar nerve)

Question 30

Dorasl interossei manus Origin: Insertion: Innervation:

Answer 30

Origin: 1: Metacarpals of thumb and index finger 2: Metacarpals of index and middle fingers 3: Metacarpals of middle and ring fingers 4: metacarpals of ring and little fingers Insertion: Dorsal digital expansion Innervation:

Question 31

Extensor digiti minimi Origin: Insertion: Innervation:

Answer 31

Origin: Lateral epicondyle of humerus via common extensor tendon Insertion: Phalanges of little finger Innervation: Radial N (posterior interosseous N, C7, C8)