Muscles of the Anterior Forearm

Question 1

Muscles in the superficial group of the anterior forearm

Answer 1

Flexor Carpi Ulnaris
Palmaris Longus
Flexor Carpis Radialis
Pronator Teres

Question 2

Flexor Carpi Ulnaris

Answer 2

Attachments: medial epicondyle, long origin from the ulna and passes into the wrist and attaches to the pisiform carpal bone

Actions: flexions and adduction at the wrist

Innervation: Ulnar Nerve

Question 3

Palmaris Longus

Answer 3

Attachments: From the medial epicondyle and attaches to the flexor retinaculum of the wrist

Actions: Flexion at the wrist

Innervation: Median Nerve

Question 4

Flexor Carpis Radialis

Answer 4

Attachement: from the medial epicondyle, attaches to the base of metacarpals 2 and 3

Actions: flexion and abduction of the wrist

Innervation: Median nerve

Question 5

Pronator Teres

Answer 5

Attachments: Medial epicondyle and the coronoid process of the ulna to the lateral midshaft of the radius

Actions: pronation of the forearm

Innervation: Median nerve

Question 6

Intermediate Compartment Muscle

Answer 6

Flexor Digitorum Superficialis

Question 7

Flexor Digitorum Superficialis

Answer 7

Attachments: Two heads, one from the medial epicondyle, the other from the radius. The muscle spolits into 4 tendons at the wrist which travel through the carpal tunnel and attach to the middle phalanges of the four fingers

Actions: flexes the metacarpophalangeal joints and the proximal interphalangeal joint at the four fingers and it flexes the wrist

Innervation: Median Nerve

Question 8

Deep Compartment

Answer 8

Flexor Digitorum Profundus, flexor pollicus longus and pronator quadratus

Question 9

Flexor Digitorum Profundus

Answer 9

Attachments: Originates from the ulna and splits into four tendons at the wrist and attach to the distal phalanges of the four fingers

Actions: flex distal interphalangeal joints of the fingers. It also flexes at the metacarpophalageal joints and the wrist

Innervation: The medial half (little and wring finger) is by the ulnar nerve. The lateral half is innervated by the anterior interosseous branch of the median nerve

Question 10

Flexor Pollicus Longus

Answer 10

Attachments: anterior surface of the radius and surround membrane. Attaches to the base of the distal phalanx of the thumb

Actions: Flexes the interphalangeal and metacarpophalangeal joint of the thumb

Innervation: Median nerve

Question 11

Pronator Quadratus

Answer 11

Attachments: originates from the anterior surface of the ulna and attaches to the anterior surface of the radius.

Actions: Pronation of the forearm

Innervation: median nerve (anterior interosseus nerve)

Question 12

Brachioradialis

Answer 12

Flexion of the elbow. Supplied by the radial nerve.