the back of the forearm

Question 1

what is the origin and insertion of the brachioradialis

Answer 1

origin:upper part of lateral supra-condylar ridge of
humerus.
insertion: base of styloid process of radius

Question 2

what action does the brachioradialis perform

Answer 2

Accessory flexor of elbow joint when forearm is mid-pronated.

Question 3

what nerve supplies the brachioradialis

Answer 3

the radial nerve

Question 4

what is the origin and insertion of the extensor carpi radialis longus

Answer 4

origin:Lower part of lateral supra- condylar ridge of humerus.
insertion:Dorsal surface of base of
metacarpal 2.

Question 5

what action does extensor carpi radialis longus perform

Answer 5

extends and abducts the wrist

Question 6

what nerve supplies the extensor carpi radialis

Answer 6

the radial nerve

Question 7

what is the origin and insertion of the extensor carpi radialis brevis

Answer 7

origin: lateral epicondyle of humerus
insertion: Dorsal surface of base of metacarpal 3

Question 8

what is the action of Extensor carpi radialis brevis

Answer 8

Extends and abducts the wrist.

Question 9

what is the nerve supply to Extensor carpi radialis brevis

Answer 9

Deep branch of radial nerve.

Question 10

what is the origin and insertion of extensor digitorum?

Answer 10

origin: Lateral epicondyle o f humerus.
insertion: Four tendons, into thedorsal aspects of the bases of the middle and distal phalanges

Question 11

what is the action of the extensor digitorum

Answer 11

Extends the inter - phalangeal joints of the (medial 4 fingers), metacapo - phalangeal joints and also extends the wrist

Question 12

what is the nerve supply of the extensor digitorum

Answer 12

Posterior interosseous branch of radial.

Question 13

what is the origin and insertion of the extensor digit minimi

Answer 13

origin:Lateral epicondyle of humerus.
Insertion: Extensor expansion of the little finger

Question 14

what is the action of extensor digiti minimi

Answer 14

extends the little finger

Question 15

what is the nerve supply of extensor digiti minimi

Answer 15

Posterior interosseous nerve

Question 16

what is the origin and insertion of extensor carpi ulnaris

Answer 16

Origin: Lateral epicondyle of humerus and posterior border of ulna
Insertion: The base of the metacarpal 5

Question 17

what is the action of extensor carpi ulnaris

Answer 17

Extends and adducts the wrist.

Question 18

what is the nerve supply of extensor carpi ulnaris

Answer 18

Posterior interosseous nerve.

Question 19

what is the origin and insertion of anconeous

Answer 19

Origin: Posterior surface of lateral epicondyle of humerus.
Insertion: Olecranon and upper posterior surface of
ulna.

Question 20

what is the action of anconeous

Answer 20

extensor of the elbow joint

Question 21

what is the nerve supply of anconeous

Answer 21

radial nerve

Question 22

what is the origin and insertion of supinator

Answer 22

Origin: Lateral epicondyle of humerus &crest of the ulna.
Insertion: Lateral surface of radius above to the oblique line.

Question 23

what is the action of supinator

Answer 23

supination

Question 24

what is the nerve supply of supinator

Answer 24

deep branch of radial nerve

Question 25

what is the origin and insertion of Abductor pollicis longus

Answer 25

Origin: Posterior surfaces of ulna and radius (below to the attachments of anconeus and supinator), and intervening interosseous membrane. Insertion: Lateral side of base of metacarpal 1.

Question 26

what is the action of Abductor pollicis longus

Answer 26

Abducts carpometacarpal joint of thumb.

Question 27

what is the nerve supply of Abductor pollicis longus

Answer 27

Posterior interosseous nerve.

Question 28

what is the origin and insertion of Extensor pollicis brevis

Answer 28

Origin: Posterior surface of radius (below to abductor pollicis longus) and the adjacent interosseous membrane. Insertion: Dorsal surface of base of pr the thumb.

Question 29

what is the action of Extensor pollicis brevis

Answer 29

extends the metacarpo phalangeal joint of the thumb and also extends the carpo metacarpal joint of the thumb

Question 30

what is the nerve supply of Extensor pollicis brevis

Answer 30

Posterior interosseous nerve.

Question 31

what is the origin and insertion of Extensor policis longus

Answer 31

Origin: Posterior surface of ulna (below the abductor pollicislongus) and the adjacent interosseous membrane. Insertion: Dorsal surface of base of distal phalanx of thumb.

Question 32

what is the action of Extensor policis longus

Answer 32

Extends inter-phalangeal joint of the thumb

Question 33

what is the nerve supply of extensor policis longus

Answer 33

Posterior interosseous nerve.

Question 34

what is the origin and insertion point of extensor indicus

Answer 34

Origin: Posterior surface of ulna (below to extensor pollicis longus) and adjacent interosseous membrane. Insertion: Extensor expansion of index finger.

Question 35

what is the action of extensor indicus

Answer 35

Extends index finger.

Question 36

what is the nerve supply of extensor indicus

Answer 36

Posterior interosseous nerve.

Question 37

what is the function of extensor retinaculum

Answer 37

It holds the long extensor tendons in position.

Question 38

what is the origin and insertion of extensor retinculum

Answer 38

Medially to the triquetrum & pisiform bones and laterally to the lower part of the anterior border of radius.