Anterior Forearm Muscles

Question 1

Pronator Teres

Answer 1

O: Medial epicondyle of Humerus, and Coronoid Process of Ulna
I: Middle of Lateral Surface of Radius
N: Median Nerve (C6, C7)
A: Pronates and flexes forearm (at elbow)

Question 2

Flexor Carpi Radialis

Answer 2

O: Medial Epicondyle of Humerus
I: Base of 2nd Metacarpal Bone
N: Median Nerve (C6, C7)
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 of Ulna
I: Pisiform Bone, Hook of Hamate Bone, and 5th Metacarpal Bone
N: Ulnar Nerve, C7, C8
A: Flexes and adducts wrist; stabilizes your wrist in neutral

Question 4

Palmaris Longus

Answer 4

O: Medial Epicondyle of Humerus
I: Distal half of flexor retinaculum and palmar aponeurosis
N: Median Nerve (C7, C8)
A: Felxes hand and tightens palmar aponeurosis

Question 5

Flexor Digitorum Superficialis

Answer 5

O: Humeroulnar Head: Medial epicondyle of Humerus, Ulnar Collateral Ligament, and Coronoid process of Ulna; Radial Head: Superior half of anterior border of radius
I: Bodies of middle phalanges of medial four digits (branches to the sides)
N: Median Nerve (C7, C8, T1)
A: Flexes middle phalanges at proximal IP joints of medial 4 digits; flexes proximal phalanges at MCP joints and hand

Question 6

Flexor Digitorum Profundus

Answer 6

O: Proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane
I: Bases of Distal Phalanges of medial 4 Digits
N: Medial Part–> Digits 4,5 : Ulnar Nerve (C8, T1) ; Lateral Part–> Digits 2,3: Anterior Interosseous Nerve (C8, T1)
A: Flexes distal phalanges at distal IP joints of medial 4 digits, assists with flexion of the hand; medial part flexes DIP of digits 4 and 5; lateral part of digits 2 and 3

Question 7

Flexor Pollicis Longus

Answer 7

O: Anterior Surface of Radius and adjacent Interosseous Membrane
I: Base of Distal Phalanx of Thumb
N: :Anterior Interosseous Nerve (C8, T1)
A: Flexes Phalanges of Thumb

Question 8

Pronator Quadratus

Answer 8

O: Distal 1/4 Anterior surface of Ulna
I: Distal 1/4 Anterior Surface of Radius
N: Anterior Interosseous Nerve from Median (C8, T1)
A: Pronates forearm, deep fibers bind radius and Ulna together