Flexor Region of Forearm

Question 1

Pronator Teres

Answer 1

O: Ulnar Head: Coronoid Process
Humeral Head: Medial Epicondyle of Humerus
I: Middle of Convexity of lateral surface of radius
N: Median Nerve
A: 1. Pronate forearm
2. Flex forearm (at elbow)

Question 2

Flexor Carpi Radialis

Answer 2

O: Medial Epicondyle of Humerus
I: Base of 2nd metacarpal
N: Median Nerve
A: Flexes and Abducts hand at wrist

Question 3

Flexor Carpi Ulnaris

Answer 3

O: Humeral Head: Medial epicondyle of humerus
Ulnar Head: Olecranon and posterior border (via aponeurosis)
I: 1. Pisiform
2. Hook of hamate
3. 5th Metacarpal
N: Ulnar Nerve
A: Flexers and Abducts hand at wrist

Question 4

Palmaris Longus

Answer 4

O:  Medial epicondyle of Humerus
I:  1.  Distal half of flexor retinaculum
    2.  Apex of Palmar Aponeurosis
N:  Median Nerve
A:  1.  Flexes hand at wrist
     2.  Tenses palmar aponeurosis

Question 5

Palmaris Brevis

Answer 5

O: 1. Medial border of palmar aponeurosis
2. Skin on medial border of hand
I: Skin over hypothenar eminence
N: Ulnar Nerve
A: 1. Aids palmar grip by wrinkling skin of hypothenar eminence and deepens hollow of palm
2. Protects and covers ulnar nerve and artery

Question 6

Flexor Digitorum Superficialis

Answer 6

O: Humeroulnar Head: Medial Epicondyle of Humerus
Radial Head: Superior half of anterior border of radius
I: Shafts of middle phalanges of medial four digits
N: Median Nerve C8, T1
A: 1. Flexes middle phalanges at proximal interphalangeal joints of middle four digits
2. Acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints

Question 7

Flexor Digitorum Profundus

Answer 7

O: Medial/Lateral Parts: Proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane
I: Medial Part: Bases of distal phalanges of 4th and 5th digits
Lateral Part: Bases of distal phalanges of 2nd and 3rd digits
N: Medial Half: Ulnar Nerve
Lateral Half: Median Nerve C8, T1
A: Medial: Flexes distal phalanges 4 and 5 at distal interphalangeal joints
Lateral: Flexes distal phalanges 2 and 3 at distal interphalangeal joints

Question 8

Flexor Pollicis Longus

Answer 8

O: Anterior surface of radius and adjacent interosseous membrane
I: Base of distal phalanx of thumb
N: Median Nerve
A: Flexes phalanges of 1st digit

Question 9

Pronator Quadratus

Answer 9

O: Distal 1/4 of anterior surface of ulna
I: Distal 1/4 of anterior surface of radius
N: Median Nerve
A: 1. Pronates forearm
2. Deep fibers bind radius and ulna together