Ch 7 Hand & Wrist

Question 1

Memorize hand bones (names of carpals, metacarpals, phalanges, and the joints between them)

Question 2

The wrist and hand contain how many bones

Answer 2

29

Question 3

Breakdown the 29 bones in hand and wrist

Answer 3

8 carpals in 2 rows, 5 metacarpals, 14 phalanges

Question 4

What are the 8 carpal names in order? (Proximal first, then distal)

Answer 4

Scaphoid
Lunate
Triquetrum
Pisiform

Trapezium
Trapezoid
Capitate
Hamate

Question 5

Wrist is what kind of joint? What are the movements?

Answer 5

Condyloid joint ;; flexion, extension, abduction and adduction

Question 6

What are the 3 finger joints?

Answer 6

Metacarpalphalangeal (condyloid joint)
Proximal interphalangeal (ginglymus joint)
Distal interphalangeal (gingylmus joint)

Question 7

What are the 2 thumb joints?

Answer 7

Metacarpalphalangeal (gingylmus joint)
Interphalangeal (gingylmus joint)

Question 8

There are ___ muscles that move the wrist but do not cross the hand, and ___ muscles that primarily move phalanges but also involve wrist action

Answer 8

6 ;
9

Question 9

What are the anteromedial muscles?

Answer 9

Flexor carpi radialis
Flexor carpi ulnaris
Palmaris longus
Flexor digitorum superficial is
Flexor digitorum profundus
Flexor pollicis longus

Question 10

What are the posterolateral muscles?

Answer 10

Extensor carpi radialis longus
Extensor carpi radialis breves
Extensor carpi ulnaris
Extensor digitorum
Extensor indicis
Extensor digiti minimi
Extensor pollicis longus
Extensor pollicis brevis
Abductor pollicis longus

Question 11

What is the origin of flexor carpi radialis? (Same as palmaris longus and flexor carpi ulnaris)
What is the insertion?

Answer 11

Medial epicondyle of humerus ;
Second and third metacarpal base (anterior/palmar)

Question 12

Actions of flexor carpi radialis?

Answer 12

Wrist flexion and abduction, elbow flexion

Question 13

What is the origin of palmaris longus? (Same as flexor carpi radialis and flexor carpi ulnaris)

What is the insertion?

Answer 13

Medial epicondyle of humerus ;

Palmaris aponeuros of 2-5 metacarpals

Question 14

What are the actions of palmaris longus?

Answer 14

Wrist flexion ; elbow flexion

Question 15

What are the origins of flexor carpi ulnaris? (1 of them is the same as flexor carpi radialis and palmaris longus)

What are the insertions? (Hint, carpals 4 & 8, and a metacarpal)

Answer 15

Medial epocondyle of humerus, &
Posterior proximal aspect of ulna

Pisiform, Hamate, and 5th metacarpal

Question 16

What are the actions of flexor carpi ulnaris?

Answer 16

Wrist flexion & wrist adduction

Question 17

What are the origins of extensor carpi ulnaris? (1 is the same as extensor carpi radialis brevis)
What is the insertion?

Answer 17

Lateral epicondyle of humerus, &
Middle of the posterior border of ulna

Base of 5th metacarpal

Question 18

What are the actions of extensor carpi ulnaris?

Answer 18

Wrist extension, wrist adduction (and elbow extensions?)

Question 19

What is the origin of extensor carpi radialis brevis? (Same as extensor carpi ulnaris)

What is the insertion?

Answer 19

Lateral epicondyle of humerus ;

3rd metacarpal

Question 20

What are the actions of extensor carpi radialis brevis?

Answer 20

Wrist extension & wrist abduction, elbow extension

Question 21

What are the origins of extensor carpi radialis longus? (One is shared with the other extensors)

What is the insertion?

Answer 21

Lateral epicondyle of humerus &
Lower 1/3 of lateral supracondylar ride of humerus

Base of second metacarpal

Question 22

what are the actions of extensor carpi radialis longus?

Answer 22

Wrist extension, wrist abduction, elbow extension

Question 23

what are the actions of extensor carpi radialis longus?

Answer 23

Wrist extension, wrist abduction, elbow extension

Question 24

What is the origin of extensor digitorum?
What is the insertion?

Answer 24

Lateral epicondyle of humerus ;

Four tendons of middle and distal phalanges of the four fingers

Question 25

What are the actions of extensor digitorum?

Answer 25

Wrist extension, extension of fingers

Question 26

What is the origin of extensor indicis?
What is the insertion?

Answer 26

Middle to distal 1/3 of posterior ulna

Base of middle and distal phalange of index finger (2nd phalange)

Question 27

What are the actions of extensor indicis?

Answer 27

Extension of index finger and wrist

Question 28

What is the origin of extensor digiti minimi?
What is the insertion?

Answer 28

Lateral epicondyle of humerus

Base of middle and distal phalange of pinky (5th phalange, that’s which its called minimi)

Question 29

What are the actions of extensor digiti minimi?

Answer 29

Pinky extension (5th phalange) and wrist extension slightly

Question 30

What is the origin of extensor pollicis brevis?
What is the insertion?

Answer 30

Posterior lower middle radius

Base of proximal phalange of thumb

Question 31

What are the actions of extensor pollicis brevis?

Answer 31

Extension of thumb

Question 32

What is the origin of extensor pollicis longus?
What is the insertion?

Answer 32

Posterior lateral surface of lower ulna

base of distal phalange of thumb

Question 33

What are the actions of extensor pollicis longus?

Answer 33

Extension of wrist and extension of thumb

Question 34

What are the origins of abductor pollicis longus?
What is the insertion?

Answer 34

Posterior aspect of radius, and midshaft of ulna
Base of first metacarpal (below thumb)

Question 35

What is the action of abductor pollicis longus?

Answer 35

Abduction of wrist/thumb