Upper limb pt 2- forearm, wrist and hand

Question 1

What muscles move radio ulnar joints?

Answer 1

• Pronator teres
• Pronator quadratus
• Supinator

Question 2

What movements are involved in distal radio ulnar joint?

Answer 2

• supination
• pronation

Question 3

What are the joints of the hand?

Answer 3

• Intercarpal, mid-carpal
• Carpometacarpal
• Intermetacarpal
• Interphalangeal
• Metacarpophalangeal

Question 4

Carpometacarpal joint of thumb (CMC joint)=

Answer 4

• Saddle synovial joint
• Mobility: shape of articular surfaces

Question 5

Movement of the thumb=

Answer 5

• Abduction
• Adduction
• Extension
• Flexion
• Opposition
• Reposition

Question 6

What is the thenar eminence group of muscles?

Answer 6

fleshy part at the base of the thumb, made up of 4 muscles which control the movements of the thumb:
- Adductor pollicis
- Flexor pollicis brevis
- Opponens pollicis
- Adductor pollicis brevis

Question 7

Hypothernar eminence group muscles=

Answer 7

3 main muscles:
- abductor digiti minimi
- flexor digiti minimi brevis
-opponens digiti minimi

Question 8

What are the intrinsic muscles of the hand?

Answer 8

• dorsal interossei
• lumbricals
• palmar interossei

Question 9

What is the extensor hood?

Answer 9

Is a fibrous structure located on the back of the fingers and toes. It serves as an attachment and distribution site for tendons and ligaments involved in finger and toe extension.
It is formed by the extensor digitorum tendon as it spreads out over the dorsal of the proximal phalanges.

Question 10

What is the anatomical snuff box?

Answer 10

Is a triangular depression on the lateral side of the wrist, visible and palpable when the thumb is fully extended.
It is between the extensor longs tendon and extensor pollicis breves tendon.
The floor is formed by scaphoid and trapezium bones, roof is covered by skin and superficial fascia.
The radial artery can be palpated here, it passes through the snuffbox.

Question 11

What is the carpal tunnel?

Answer 11

A rigid passageway in the wrist, plays a key role in hand and finger function and also a common site of nerve compression.
The median nerve passes through, responsible for sensation of the thumb.
The carpal tunnel also contains tendons of the flexor muscles:
- flexor digitorum superficials
- flexor digitorum profundus
- flexor pollicis longus