Intrinsic Muscles of Forearm

Question 1

Extensor Carpi Ulnaris

Answer 1

Lateral condyle of the humerus and posterior ulna to the base of the 5th metacarpal

Extends and adducts hand

Question 2

Extensor Carpi Radialis Longus

Answer 2

Lateral supracondylar ridge of the humerus to the base of the 2nd metacarpal

Extends and abducts wrist

Question 3

Extensor Carpi Radialis Brevis

Answer 3

Lateral epicondyle of the humerus to the medial 4 digits

Extends wrist and medial 4 digits

Question 4

Extensor Digitorum

Answer 4

Lateral epicondyle of the humerus to the styloid process of the radius

Extends wrist and medial 4 digits

Question 5

Brachioradialis

Answer 5

Lateral supracondylar ridge of the humerus to the styloid process of the radius

Flexes elbow and helps in pronation

Question 6

Extensor Digiti Minimi

Answer 6

Lateral epicondyle of the humerus to the 5th digit

Extends wrist and 5th digit

Question 7

Extensor Indicis

Answer 7

Posterior ulna and interosseous membrane to the 2nd digit

Extends wrist and 2nd digit

Question 8

Extensor Pollicis Longus

Answer 8

Posterior ulna and interosseous membrane to the distal phalanx of the pollex

Extends and abducts wrist and pollex

Question 9

Extensor Pollicis Brevis

Answer 9

Posterior radius and interosseous membrane to the proximal phalanx of the pollex

Extends wrist and pollex

Question 10

Abductor Pollicis Brevis

Answer 10

Scaphoid, trapezium and flexor retinaculum to the proximal phalanx of the pollex

Adducts pollex

Question 11

Adductor Pollicis

Answer 11

Palmar surface of the 3rd metacarpal, capitate and base of 2nd metacarpal to the proximal phalanx of pollex

Opposition and flexion of the pollex

Question 12

Flexor Pollicis Brevis

Answer 12

Flexor retinaculum, capitate and trapezium to the proximal phalanx of the pollex

Opposition of the pollex

Question 13

Abductor Digiti Minimi

Answer 13

Pisiform to proximal phalanx of 5th digit

Flexes and abducts 5th digit

Question 14

Flexor Digiti Minimi

Answer 14

Flexor retinaculum and hamate to the proximal phalanx of the 5th digit

Flexes 5th digit

Question 15

Opponens Digiti Minimi

Answer 15

Hamate to the 5th metacarpal

Opposes 5th digit

Question 16

Palmaris Brevis

Answer 16

Palmar aponeurosis to the skin of the hypothenar eminence

Tightens palmar aponeurosis

Question 17

First Through Fourth Lumbricals

Answer 17

Tendons of flexor digitorum profundus to the medial 4 digits

Flex and extend medial 4 digits

Question 18

First Through Fourth Dorsal Interossei

Answer 18

By two heads from the metacarpals to the proximal phalanx of the 2nd through 4th digits

Flexes and extends medial 4 digits

Question 19

First through Third Palmar Interossei

Answer 19

Metacarpals 2, 4 & 5 to the proximal phalanx of those same digits

Flexes and extends digits

Question 20

Pronator Teres

Answer 20

Medial epicondyle of the humerus and coronoid process to the mid-lateral surface of the radius

Pronates forearm; flexes elbow

Question 21

Flexor Carpi Radialis

Answer 21

Medial epicondyle of the humerus to the base of the 2nd metacarpal

Flexes and abducts wrist (palmaris longus also flexes elbow)

Question 22

Palmaris Carpi Radialis

Answer 22

Medial epicondyle of the humerus to the palmar aponeurosis and flexor retinaculum

Flexes and abducts wrist (palmaris longus also flexes elbow)

Question 23

Flexor Carpi Ulnaris

Answer 23

Medial epicondyle of the humerus and olecranon to the pisiform, hook of hamate and 5th metacarpal

Flexes and adducts wrist

Question 24

Flexor Digitorum Superficialis

Answer 24

Medial epicondyle of the humerus, proximal ulna and anterior radius to the phalanges of the medial 4 digits

Flexes medial 4 digits

Question 25

Flexor Digitorum Profundus

Answer 25

Proximal, medial ulna and interosseous membrane to the distal phalanges of the medial 4 digits

Flexes wrist and medial 4 digits

Question 26

Flexor Pollicis Longus

Answer 26

Anterior surface of the radius to distal phalanx of the pollex

Flexes Pollex

Question 27

Pronator Quadratus

Answer 27

Distal ulna to distal radius on their anterior surface

Pronates forearm