Ch. 3 - Forearm & Hand

Question 1

What are the two bones of the forearm?

Answer 1

Radius and ulna

The radius is lateral to the ulna in anatomical position, the ulna is superficial to the radius

Question 2

What are the 8 carpals called?

Answer 2

Scaphoid - boat shaped
Lunate - crescent shapes
Triquetrum - three cornered
Pisiform - pea shaped
Trapezium
Trapezoid
Capitate - head shaped
Hamate - hooked

Question 3

What are the three joints in the elbow?

Answer 3

Humeroradial
Humeroulnar
Proximal radioulnar

Question 4

What does minimi refer to?

Answer 4

The pinky

Question 5

Indicis refers to

Answer 5

2nd digit, pointer finger

Question 6

All ____ cross the elbow joint, wrap around and then connect to wrist/hand

Answer 6

Flexors

Question 7

Pollicis

Answer 7

Thumb

Question 8

The extensor group in the forearm includes:

Answer 8

Extensor carpi radialis longus

Extensor carpi radialis brevis

Extensor carpi ulnaris

Extensor digitorum

Question 9

The flexor group in the forearm includes:

Answer 9

Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
Flexor digitorum superficialis
Flexor digitorum profundus

Question 10

Brachialis

Answer 10

Action:
Flex elbow

Origin:
Distal 1/2 of anterior surface of humerus

Insertion:
Tuberosity and coronoid process of ulna

Question 11

Brachioradialis

Answer 11

Action:
Flex elbow, help pronate/supinate forearm

Origin:
Proximal 2/3 of lateral supracondylar ridge of humerus

Insertion:
Styloid process of radius

Question 12

Extensor carpi radialis longus

Answer 12

Action:
Extend and abduct wrist (radiocarpal joint)
Assist flex elbow (humeroulnar joint)

Origin:
Distal 1/3 if lateral supracondylar ridge of humerus

Insertion:
Base of 2nd metacarpal

Question 13

Extensor carpi radialis brevis

Answer 13

Action:
Extend and abduct wrist

Origin:
Common extensor tendon from lateral epicondyle of humerus

Insertion:
Base of 3rd metacarpal

Question 14

Extensor carpi ulnaris

Answer 14

Action:
Extend and ADDuct wrist

Origin:
Common extensor tendon from lateral epicondyle of humerus

Insertion:
Base of 5th metacarpal

Question 15

Extensor digitorum

Answer 15

Action: extend 2nd through 5th fingers

Origin:
Common extensor tendon from lateral epicondyle of humerus

Insertion:
Base of middle and distal phalanges of 2nd through 5th fingers

Question 16

Flexor carpi radialis

Answer 16

Action:
Flex and abduct wrist

Origin:
Common flexor tendon from medial epicondyle of humerus

Insertion:
Base of 2nd and 3rd metacarpals

Question 17

Palmaris longus

Answer 17

Action:
Tense palmar fascia, flex wrist

Origin:
Common flexor tendon from medial epicondyle of humerus

Insertion:
Flexor retinaculum and palmar aponeurosis

Question 18

Flexor carpi ulnaris

Answer 18

Action:
Flex and adduct wrist

Origin:
Humeral head: Common flexor tendon from medial epicondyle of humerus
Ulnar head: posterior surface of proximal 2/3 of ulna

Insertion:
Pisiform, hook of hamate, base of 5th metacarpal

Question 19

Flexor digitorum superficialis

Answer 19

Action:
Flex 2nd - 5th fingers
Flex wrist

Origin:

Origin:
Common flexor tendon from medial epicondyle of humerus, ulnar collateral ligament, coronoid process of ulna, interosseus membrane, proximal shaft of ulna

Insertion:
Sides of middle phalanges of 2nd - 5th fingers

Question 20

Flexor digitorum profundus

Answer 20

Action:
Flex 2nd through 5th fingers

Origin:
Anterior and medial surfaces of proximal 3/4 ulna

Insertion:
Base of distal phalanges,
Palmar surface of 2nd - 5th fingers

Question 21

What are the ligaments of the elbow?

Answer 21

Radial collateral ligament
Annular ligament
Ulnar collateral ligament