Forearm and Hand (Chapter 3) Exam III

Question 1

What forms the “point” of the elbow?

Answer 1

olecranon process

Question 2

What is the action of brachialis?

Answer 2

flex the elbow (humeroulnar joint)

Question 3

What is the origin of brachialis?

Answer 3

distal half of anterior surface of humerus

Question 4

What is the insertion of brachialis?

Answer 4

Tuberosity and coronoid process of ulna

Question 5

when do you use your brachialis?

Answer 5

bringing food from the plate to the mouth, picking up a load of anatomy books, carrying a baby car seat

Question 6

What actions does the brachioradialis execute?

Answer 6

flex the elbow, assist to pronate and supinate the forearm when these movements are resisted.

Question 7

What is the origin of the brachioradialis?

Answer 7

proximal two-thirds of the lateral supracondylar ridge of humerus

Question 8

What is the insertion of the brachioradialis?

Answer 8

styloid process of radius

Question 9

when do you use the brachioradialis muscle?

Answer 9

turning a door handle or screwdriver, bringing a beer stein up to your mouth, whisking cream in a bowl, hositing a toddler out of her crib

Question 10

What actions does the extensor carpi radialis longus and brevis execute?

Answer 10

extend the wrist, ad-duct the wrist, assist to flex the elbow

Question 11

What is the origin of extensor carpi radialis longus?

Answer 11

distal one-third of the lateral supracondylar ridge of humerus

Question 12

What is the insertion of extensor carpi radialis longus?

Answer 12

base of second metacarpal

Question 13

What is the origin of extensor carpi radialis brevis?

Answer 13

common extensor tendon from the lateral epicondyle of humerus

Question 14

What is the insertion of extensor carpi radialis brevis?

Answer 14

base of third metacarpal

Question 15

What action is executed by extensor carpi ulnaris?

Answer 15

extend the wrist, and adduct the wrist

Question 16

What is the origin of extensor carpi ulnaris?

Answer 16

common extensor tendon from the lateral epicondyle of humerus

Question 17

What is the insertion of extensor carpi ulnaris?

Answer 17

base of fifth metacarpal

Question 18

What action is executed by extensor digitorum?

Answer 18

extend the second through fifth fingers, assist to extend the wrist

Question 19

What is the origin of extensor digitorum ?

Answer 19

common extensor tendon from the lateral epicondyle of humerus

Question 20

What is the insertion of extensor digitorum?

Answer 20

bases of middle and distal phalanges of second through fifth fingers

Question 21

“Wad of Three” is referring to what three muscles?

Answer 21

Brachioradialis, extensor carpi radialis lonus and brevis

Question 22

What weak elbow extensor muscle is located lateral to the olecranon process?

Answer 22

Anconeus

Question 23

what action does the anconeus do?

Answer 23

extend the elbow

Question 24

What is the origin of the anconeus?

Answer 24

lateral epicondyle of the humerus

Question 25

what is the insertion of the anconeus?

Answer 25

olecranon process and posterior, proximal surface of ulna

Question 26

What small but crucial muscle assists the digitorum in specifically extending the index finger?

Answer 26

Exenstor Indicis

Question 27

What actions does the extensor indicis execute?

Answer 27

extend the second finger, adduct the second finger, may assist to extend the wrist

Question 28

What is the origin of the extensor indicis ?

Answer 28

posterior surface of distal shaft of ulna and interosseous membrane

Question 29

What is the insertion of the extensor indicis?

Answer 29

tendon of the extensor digitorum at the level of the second metacarpal.

Question 30

What actions does the flexor carpi radialis do?

Answer 30

flex the wrist, ab-duct the wrist, may assist to flex the elbow

Question 31

What is the origin of the flexor carpi radialis ?

Answer 31

common flexor tendon from medial epicondyle of humerus

Question 32

what is the insertion of the flexor carpi radialis?

Answer 32

bases of second and third metacarpals

Question 33

what actions does palmaris longus do?

Answer 33

tense the palmar fascia, flex the wrist, and may assist to flex the elbow

Question 34

What is the origin of the palmaris longus?

Answer 34

common flexor tendon from meidal epicondyle of humerus

Question 35

what is the insertion of the palmaris longus?

Answer 35

flexor retinaculum and palmar aponeurosis

Question 36

What actions does flexor carpi ulnaris?

Answer 36

flex the wrist, adduct the wrist, and assist to flex the elbow

Question 37

What is the origin of flexor carpi ulnaris?

Answer 37

common flexor tendon from medial epicondyle of humerus, posterior surface of proximal two-thirds of ulna

Question 38

What is the insertion of flexor carpi ulnaris?

Answer 38

pisiform, hook of hamate and base of fifth metacarpal

Question 39

What actions does the flexor digitorum superficialis ?

Answer 39

flex the second through fifth fingers

Question 40

What is the origin of flexor digitorum superficialis?

Answer 40

common flexor tendon from medial epicondyle of humerus, ulnar collateral ligament, coronoid process of ulna, interosseous membrane and proximal shaft of radius

Question 41

What is the insertion of flexor digitorum superficialis?

Answer 41

sides of middle phalanges of second through fifth fingers

Question 42

What is the actions of flexor digitorum profundus?

Answer 42

flex the second through fifth fingers

Question 43

what is the origin of flexor digitorum profundus?

Answer 43

anterior and medial surfaces of proximal three-quarters of ulna

Question 44

What is the insertion of flexor digitorum profundus?

Answer 44

bases of distal phalanges, palmar surface of second through fifth fingers

Question 45

What percentage of the population is the palmaris longus absent in?

Answer 45

11%

Question 46

What actions does the pronator teres execute?

Answer 46

pronate the forearm, assist to flex the elbow

Question 47

what is the origin of the pronator teres?

Answer 47

common flexor tendon from medial epicondyle of humerus and coronoid process of the ulna

Question 48

What is the insertion of the pronator teres?

Answer 48

middle of lateral surface of the radius

Question 49

when do you use your pronator teres?

Answer 49

turning a doorknob, arranging cups in the dishwasher, swimming the breaststroke

Question 50

What actions does the pronator quadratus execute?

Answer 50

pronate the forearm

Question 51

What is the origin of the pronator quadratus?

Answer 51

medial, anterior surface of distal ulna

Question 52

What is the insertion of the pronator quadratus?

Answer 52

lateral, anterior surface of distal radius

Question 53

What actions does the supinator execute?

Answer 53

supinate the forearm

Question 54

What is the origin of the supinatior?

Answer 54

lateral epicondyle of humerus, radial collateral ligament, annular ligament and supinator crest of the ulna

Question 55

What is the insertion of the supinator?

Answer 55

anterior, lateral surface of proximal one-third of radial shaft

Question 56

when do you use the supinator?

Answer 56

digging out a big scoop of ice cream, swirling the water in a bathtub, folding your clothes

Question 57

How many muscles are involved in moving the thumb?

Answer 57

8; four short and four long

Question 58

what actions does the abductor pollicis longus?

Answer 58

the ab-duct the thumb, extend the thumb, ab-duct the wrist

Question 59

what origin is the abductor pollicis longus?

Answer 59

posterior surface of radius and ulna, and interosseous membrane

Question 60

what is the insertion of the abductor pollicic longus?

Answer 60

base of the first metacarpal

Question 61

What actions does the extensor pollicis longus and brevis execute?

Answer 61

extend the thumb, ab-duct the wrist

Question 62

What is the origin of extensor pollicis longus?

Answer 62

posterior surface of ulna and interosseous membrane, posterior surface of radius and interosseous membrane

Question 63

What is the insertion of extensor pollicis longus?

Answer 63

base of distal phalanx of thumb, base of proximal phalanx of thumb

Question 64

what actions does the flexor pollicis longus?

Answer 64

flex the thumb, assist to flex the wrist

Question 65

what is the origin of flexor pollicis longus?

Answer 65

anterior surface of radius and interosseous membrane

Question 66

what is the insertion of flexor pollicis longus?

Answer 66

base of distal phalanx of thumb