Lectures Slide of the Wrist and Hand

Question 1

What are the two categories of wrist and hand muscles?

What do they mean?

Answer 1

Extrinsic- Origin in the forearm and insertion in the hand

Intrinisic- Origin and insertion both in the hand

Question 2

How many bones in the wrist and hand?

Answer 2

29

Question 3

Name all bone number is the wrist and hand?

Answer 3

• Radius and Ulna
• 8 wrist (carpal) bones
• 5 metacarpal bones connect wrist to fingers
• 14 phalanges (3 for each finger/ 2 for thumb)

Question 4

What is the joint to the wrist joint? What movement occurs?

Answer 4

• Condyloid joint

- Movement occurs mostly between the radius and the proximal row of carpal bones

Question 5

What are the joints for the finger joints?

Answer 5

• MCP (metacarpophalangeal) joint: condyloid

- PIP (proximal interphalangeal) and DIP (distal iinterphalangeal) joint: ginglymus

Question 6

What are the joints for the the ithumb joints?

Answer 6

• Carpometacarpal joint (thumb): saddle
• MCP joint: ginglymus
• IP joint: ginglymus

Question 7

To be all pure the wrist flexors and extensors attach to _________?

Answer 7

-Somewhere on the 2nd to 5th metacarpals

Question 8

What are the two important tendons?

Answer 8

1. Flexor tendon

2. Extensor tendon

Question 9

What does the fleor tendon attach to?

Answer 9

• Attaches to the medial epicondyle of the humerus

Question 10

How many muscles attach to the flexor tendon? Name all.

Answer 10

• 5
  1. Flexor carpi radialis
  2. Palmaris longus
  3. Flexor carpi ulnaris
  4. Pronator teres
  5. Flexor digitorum superficialis

Question 11

What attaches to the extensor tendon?

Answer 11

• Attaches to the lateral epicondyle of the humerus

Question 12

How many muscles attaches to the extensor tendon? Name all.

Answer 12

• 4
  1. Extensor carpi radialis brevis
  2. Extensor digitorum
  3. Extensor digiti minimi
  4. Extensor carpi ulnaris

Question 13

Why do the finger muscles insert at the base of the proximal, middle, and distal phalanges?

Answer 13

• Becasue these muscles also cross the wrist and elbow joints they can also move those joints

Question 14

True of False: can muscles of the hand can ONLY be intrinsic or intrinsic.

Answer 14

False: The muscle of the hand ca be either intrinisc or intrinsic

Question 15

What does extrinsic and intrinsic mean for the muscles of the hand?

Answer 15

Extrinisic- more GROSS movements

Intrinisc- more FINE movements

Question 16

Name all the gross movments of the wrsit and hand.

Answer 16

1. wrist flexion 2.wrist entension 3. wrist abduction 4. wrist adduction 5. finger and thumb flexion 6. finger and thumb extension 7. abduction of MCP joint and thumb 8. Abduction of MCP joint and thumb

Question 17

What is a common injury of the wrist and hand?

Answer 17

Carpal tunnel syndrome

Question 18

What is carpal tunnel?

Answer 18

• A passageway on the palmar side of the wrist through which the median nerve and several tendons travel

Question 19

Which tendons are associated with Carpal Tunnel?

Answer 19

1. Flexor digitorum superficialis
2. flexor digitorum profundus
3. Fexor pollicis longus

Question 20

What is cubital tunnel syndrome?

Answer 20

• Refers to the space between the two heads of the flexor carpi ulnaris through which the ulnar nerve passes
• Ulnar nerve can become compressed between these two heads

Question 21

When having carpal tunnel syndrome what are the parts that feel pain?

Answer 21

• In the hand
• tingling of the thumb
• index fingers

Question 22

When having cubital itunnel syndrome what are the parts that feel pain?

Answer 22

-tingling in the little and ring fingers

Question 23

What is texting thumb?

Answer 23

-overuse / irritation oof the flexor pollicis longus

Question 24

What is Basilar arthritis?

Answer 24

-Arthritis of the saddle joint of the thumb

Question 25

What is De Quervain’s disease?

Answer 25

• Inflammation of the synovial sheath covering the abductor pollicis longius and extensor pollicis brevis