Wrist and Hand (Myology)

Question 1

Flexor Carpi Ulnaris

Answer 1

Action:
-Hand
-Flexion
-Adduction

Origin:
*Long Head
-Olecranon
-Posterior border of ulna
*Humeral Head
-Medial epicondyle of the humerus

Insertion:
-Base of pisiform bone
-Hook of hamate
-Base of the 5th metacarpal

Innervation:
-Ulnar nerve C6-7

Question 2

Flexor Carpi Radialis

Answer 2

Action:
-Hand
-Flexion
-Abduction

Origin:
-Medial epicondyle of the humerus

Insertion:
Base of 2nd and 3rd metacarpal bones

Innervation:
Median nerve C6-7

Question 3

Flexor digitorum superficialis

Answer 3

Action:
-PIP
-Flexion
-MCP 2-5
-Flexion
-Wrist
-Flexion

Origin:
*Humeral head
-Medial epicondyle of the humerus
-Medial border of coranoid process of ulna
-Radial head
-Anterior interosseus membrane

Insertion:
-Superficial plane
-2nd and 3rd fingers
-Deep plane
-1st and 4th fingers

Innervation:
Median nerve C7-8, T1

Question 4

Flexor Digitorum Profundus

Answer 4

Action:
*DIP 2-5
-Flexion
*MCP, PIP and Wrist
-Flexion

Origin:
-Proximal 3/4 of the anterior and medial shat of ulna
-Medial surface of coronoid process of ulna
-Anterior interosseous membrane

Insertion:
-Distal phalanx of finger 2-4

Innervation:
*Medial Half
-Ulnar nerve
*Lateral Half
-Anterior interosseus nerve C8-T1

Question 5

Palmaris Longus

Answer 5

Action:
-Wrist/Hand
-Flexion

Origin:
-Medial epicondyle of humerus

Insertion:
-Palmer aponeurosis
-Flexor retinaculum at wrist

Innervation:
Median Nerve C8

Question 6

Extensor Carpi Radialis Longus

Answer 6

Action:
-Wrist
-Extension
-Abduction

Origin:
-Anterior distal 1/3 of the lateral supracondylar ridge of humerus

Insertion:
-Radial side, dorsal surface at the base of the 2nd metacarpal bone

Innervation:
-Radial Nerve C6-7

Question 7

Extensor Carpi Radialis Brevis

Answer 7

Action:
-Wrist
-Extension
-Abduction

Origin:
Lateral epicondyle of humerus

Insertion:
Radial side, dorsal surface at the base of the 3rd metacarpal bone

Innervation:
-Radial Nerve C7-8

Question 8

Extensor Carpi Ulnaris

Answer 8

Action:
-Wrist
-Extension
-Abduction
-Medial stabiliser

Origin:
-Lateral epicondyle of humerus
-Posterior ulna

Insertion:
-Dorsal base of 5th metacarpal

Innervation:
-Radial nerve C5-8, T1

Question 9

Extensor Digitorum

Answer 9

Action:
-Extends medial 4 fingers

Origin:
-Lateral epicondyle of humerus

Insertion:
-Extensor expansion of the medial 4 fingers

Innervation:
Radial nerve