Flexors and Extensors - Attachments and Actions

Question 1

Extensor carpi radialis origin –> insertion

Answer 1

lateral supracondylar crest (humerus) –> dorsal MC II and III

Question 2

Extensor carpi radialis action

Answer 2

extend carpus

Question 3

common digital extensor origin –> insertion

Answer 3

lateral epicondyle –> extensor process, distal phalanges of digits II - V

Question 4

common digital extensor action

Answer 4

extend carpus and digits

Question 5

lateral digital extensor origin –> insertion

Answer 5

lateral epicondyle –> extensor process, distal phalanges of digits III-V

Question 6

lateral digital extensor action

Answer 6

extend carpus and digits

Question 7

Ulnaris lateralis origin –> insertion

Answer 7

lateral epicondyle –> MC V and accessory carpal bone

Question 8

ulnaris lateralis action

Answer 8

abduct, extend carpus

Question 9

abductor pollicis longus origin –> insertion

Answer 9

ulna –> MC I

Question 10

abductor pollicis longus action

Answer 10

abduct pollex (dew claw)

Question 11

supinator origin –> insertion

Answer 11

lateral epicondyle –> radius

Question 12

supinator action

Answer 12

supination (duh)

Question 13

pronator teres origin –> insertion

Answer 13

medial epicondyle –> radius

Question 14

pronator action

Answer 14

pronation

Question 15

flexor carpi radialis origin –> insertion

Answer 15

medial epicondyle –> palmar MC II and III

Question 16

flexor carpi radialis action

Answer 16

flex carpus

Question 17

superficial digital flexor origin –> insertion

Answer 17

medial epicondyle –> palmar surface, middle phalanges of digits II-V

Question 18

superficial digital flexor action

Answer 18

flex carpus and proximal interphalangeal joints

Question 19

flexor carpi ulnaris origin –> insertion

Answer 19

ulnar head - olecranon, humeral head - medial epicondyle –> accessory carpal bone

Question 20

flexor carpi ulnaris action

Answer 20

flex carpus

Question 21

deep digital flexor origins

Answer 21

humeral head - medial epicondyle
radial head - radius
ulnar head - ulna

Question 22

deep digital flexor insertion

Answer 22

palmar surface, distal phalanges of digits I-V

Question 23

deep digital flexor action

Answer 23

flex carpus and digits

Question 24

pronator quadratus attachments

Answer 24

opposed surfaces of radius and ulna