Wrist and hand...Tim style

Question 1

How many muscles are in the hand?

Answer 1

approx. 10

Question 2

How many extrinsic muscles act on the thumb?

Answer 2

4

Question 3

Can you name the 4 extrinsic muscles that act on the thumb?

Answer 3

Abductor Pollicis Brevis (APB), Flexor Pollicis Brevis (FPB), Adductor Pollicis and Oppens pollicis

Question 4

What is the origin for APB?

Answer 4

Flexor retinaculum and tubercles on scaphoid and trapezium

Question 5

What action does the Abductor Pollicis Brevis have on the thumb?

Answer 5

Assists oppens pollicis by rotating proximal phalanx slightly medially. If palm is in x and y plane…bring thumb to the z plane

Question 6

Where does APB insert?

Answer 6

On lateral side base of proximal phalanx

Question 7

There are 4 thumb muscles, 3 have the same innervation.The Adductor Pollicis is the odd one out. Which nerve supplies those 3 muscles?

Answer 7

The recurrent branch of the median nerve (C8, T1)

Question 8

Which nerve innervates the Adductor pollicis muscle?

Answer 8

Deep branch of the Ulnar nerve (C8,T1)

Question 9

Which muscle is opposed to the Abductor Pollicis? hint-What is its action?

Answer 9

The Adductor pollicis… ADducts the thumb

Question 10

What are the 6 motions of the thumb?

Answer 10

aDduction, aBduction, flexion, extension, opposition and reposition

Question 11

What is the difference between opposition and flexion?

Answer 11

Opposition is thumb to pinky, flexion is thumb to palm

Question 12

Now which two muscles do opposition and flexion for the thumb?

Answer 12

Opponens Pollicis and Flexor Pollicis brevis (FPB)

Question 13

4 thumb muscles…3 have the same origin…what is it?

Answer 13

Flexor retinaculum and tubercles of scaphoid and trapezium

the adductor pollicis is the odd muscle out

Question 14

Which muscle of the thumb moves it toward the palm giving you power to grip?

Answer 14

Adductor pollicis

Question 15

7 muscles left in the hand and all have innervation from which common nerve?

Answer 15

The ulnar nerve

Question 16

The palmaris brevis is innervated by the?

Answer 16

Superficial ulnar nerve

Question 17

The Abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi, lumbricals 3-4, palmar interossei 1-3, and dorsal interossei 1-4 are innervated by?

Answer 17

Deep ulnar nerve

Question 18

lumbricals 1-2 are innervated by?

Answer 18

Common palmar digital nn. of the median nerve (C8,T1)

Question 19

How do you test the lumbricals?

Answer 19

With a Z-movement or little kid wave which is the opposite of a claw hand

Question 20

how do you test the palmar interossei?

Answer 20

hold a piece of paper between the fingers and resist it being pulled away

Question 21

How do you test the dorsal interossei?

Answer 21

Abduct fingers against resistance

Question 22

How do you test the deep branch of the ulnar nerve?

Answer 22

Abduct fingers against resistance. Same as dorsal interossei test

Question 23

What is the difference between the dorsal interossei and the palmer interossei aside from location?

Answer 23

Their actions are opposite. The palmer interossei ADD digits 2,4 and 5 Why not 3? midline. The dorsal interossei ABD digits 2-4

Question 24

What are the two main arteries of the hand?

Answer 24

Radial and Ulnar aa.

Question 25

What are the terminal branches of the Ulnar artery?

Answer 25

The superficial palmer arterial arch and the deep palmar branch

Question 26

What are the branches off of the superficial palmar arterial arch?

Answer 26

superficial palmer arterial aches joins to the superficial branch of the radial artery. Off of this arch comes the 3 Common Palmar Digital arteries and each divides into the Proper Palmar Digital arteries

Question 27

What are the 4 branches off of the radial artery in the forearm?

Answer 27

Superficial branch of radial artery, deep palmer arterial arch, radialis indicis a., and the dorsal carpal arch

Question 28

What are the branches off of the deep palmar arterial arch?

Answer 28

It is continuous with Ulnar a. and gives rise to the 3 palmar metacarpal arteries and the princeps pollicis a. that runs on the palmar aspect of the thumb

Question 29

What are the names of the two main veins in the hand?

Answer 29

They are the superficial and deep palmer venous arches. They are associated with the superficial and deep palmer arterial arches

Question 30

What are the three and nerves that innervate the hand?

Answer 30

median n. ulnar n. and the radial n.

Question 31

What are the three palmar branches of the median n?

Answer 31

lateral branch of the median n., medial branch of the median n., and the palmer cutaneous branch of median n.

Question 32

What are the 4 palmar branches of the Ulnar n.?

Answer 32

palmar cutaneous branch, dorsal cutaneous branch, superficial branch, and the deep branch

Question 33

What is the one palmar branch off of the radial n.?

Answer 33

superficial branch of the radial n.

Question 34

What nerve does carpal tunnel syndrome affect?

Answer 34

The median nerve at the wrist by constriction of the nerve as it passes through the carpal tunnel. This will cause varying degrees of tingling and loss of sensation.

Question 35

What is the result of an injury or lesion to the median nerve at the wrist?

Answer 35

The characteristic disability is “Simian hand” and is an emaciation of the thenar eminence and the thumb is adducted and extended