Forearm- Anterior Muscles

Question 1

Superficial muscles of anterior forearm

Answer 1

Flexor carpi ulnaris
Flexor carpi radialia
Pronator Teres
Palmaris longus

Question 2

Deep muscles of anterior forearm

Answer 2

Pronator quadratus
Flexor digitorum profundus
Flexor pollicis longus
Flexor digitorum superficialis

Question 3

Flexors Nerve

Answer 3

Median

Question 4

Flexor carpi ulnaris

Answer 4

2 heads: medial epicondyle of humerus & posterior olecranon process of ulna –> media carpals (pisiform, hamate hook) & bbase of metacarpal V
Flexes and adducts the hand and flexes the forearm.
N: C7- t1: ulnar nerve
BV: ulnar collateral arteries & ant and post ulnar recurrent art

Question 5

Flexor carpi radialis

Answer 5

• Originates from the medial epicondyle of the humerus
• Inserts on the bases of metacarpals II and III
• Flexes and abducts the hand and flexes the forearm.
N: c6-c7–> median nerve
BV: recurrent ulnar artery, radial artery

Question 6

Pronator teres

Answer 6

2 heads: • Humeral head originates on the medial epicondyle of the humerus;
• Ulnar head originates on the coronoid process of the ulna
• Pronator teres inserts mid-shaft of the lateral radius
• Pronates and flexes the forearm (no action on the wrist)

Question 7

Palmaris longus

Answer 7

Originates on the medial epicondyle of humerus
• Inserts into the palmar aponeurosis
• Flexes the forearm and hand (variable).
• Lies superficially in the palm.

Question 8

Brachioradialis

Answer 8

• Originates on the lateral supracondylar ridge of the humerus
• Inserts on the base of the styloid process of the radius
N: C7–> Radial N
BV: radial artery

Question 9

Which superficial anterior forearm muscles also flex the wrist in addition to flexing the forearm?

Answer 9

flexor carpi ulnaris, flexor carpi radialis, and palmaris longus

Question 10

Deep muscles anterior forearm

Answer 10

Pronator quadratus
Flexor digitorum profundus
Flexor pollicis longus
Flexor digitorum superficialis

Question 11

Extensors nerve innervation

Answer 11

Radial n

Question 12

Pronator quadratus

Answer 12

• Originates on the distal ulna (specifically, the anteromedial aspect)
• Inserts on the distal radius (on the anterolateral aspect)
• Pronates the forearm (turns the palms face down).

Question 13

Flexor digitorum profundus

Answer 13

• Originates on the ulna and the interosseous membrane
• Inserts on distal phalanges of digits 2-5.
• Flexes digits 2-5 at the distal phalanges and metacarpophalangeal joints and also the wrist (which the tendons cross).

Question 14

Flexor pollicis longus

Answer 14

Originates on the radius and the interosseous membrane.
• Inserts on the distal phalanx of digit 1.
• Flexes digit 1 at the distal phalanges and metacarpophalangeal joints and also the wrist (which the tendons cross).

Question 15

Flexor digitorum superficialis

Answer 15

• Originates on the medial epicondyle of the humerus, the coronoid process of the ulna, and the radius (specifically,
from the oblique line)
• Inserts, via split tendons, to the middle phalanges of digits 2-5.
• Flexes middle phalanges and metacarpophalangeal joints of digits 2-5 and the carpals.

Question 16

Which 2 muscles does the median nerve travel between?

Answer 16

flexor digitorum

superficialis and flexor digitorum profundus.