Muscles Of Forearm

Question 1

Palmaris Longus

Answer 1

Innervates: median nerve
Origin: medial numeral epicondyle
Inserts: palmar aponeurosis and flexor retinaculum
Action: flexion of hand

Question 2

Flexor Digitorum Superficialis

Answer 2

Innervation: median nerve
Origin: medial humeral epicondyle, ulnar coronoid process, middle of anterior radius
Inserts: 4 tendons that split to allow passages of flexor digitorum profundus tendons and insert on the sides of the middle phalanx of each finger

Question 3

Flexor Carpi Ulnaris

Answer 3

Innervation: ulnar nerve
Origin: medial humeral epicondyle, proximal posterior ulna
Inserts: pisiform, hamate, anterior base of 5th metacarpal
Action: flexion and adduction of hand

Question 4

Extensor Carpi Radialis Longus

Answer 4

Innervation: radial nerve
Origin: lateral humeral epicondyle and lateral humeral supracondylar ridge
Inserts: posterior base of 2nd metacarpal
Action: extension and abduction of wrist

Question 5

Flexor Carpi Radialis

Answer 5

Innervation: median nerve
Origin: medial humoral epicondyle
Inserts: anterior bases of 2nd and 3rd metacarpals
Action: flexion and abduction of hand

Question 6

Extensor Carpi Radialis Brevis

Answer 6

Innervation: deep radial nerve
Origin: lateral humeral epicondyle
Insertion: posterior base of 3rd metacarpal
Action: extension and abduction of wrist

Question 7

Extensor Digitorum

Answer 7

Innervation: radial nerve
Origin: lateral humeral epicondyle
Inserts: posterior 2nd-5th middle and distal phalanges
Action: extends 2nd-5th middle and distal phalanges and extends 2nd-5th proximal phalanges and hand by continued action

Question 8

Extensor Carpi Ulnaris

Answer 8

Innervation: radial nerve
Origin: lateral humeral epicondyle and proximal posterior ulna
Inserts: posterior base of 5th metacarpal
Action: extension and adduction of hand