Functional Anatomy of the hand

Question 1

The recurrent branch on the median nerve innervates which group of muscles?

1. Thenar
2. Hypothenar

Answer 1

thenar

Question 2

Extensor digitorum tendons are innervated by which nerve?

1. Recurrent branch of median nerve
2. Deep branch of ulnar nerve
3. Posterior interossei of radial nerve

Answer 2

Posterior interossei of radial nerve. Also innervates extensor indicis and extensor digiti minimi.

Question 3

The muscles of the anatomical snuff box are innervated by?

1. Recurrent branch of median nerve
2. Deep branch of ulnar nerve
3. Posterior interossei of radial nerve

Answer 3

Posterior interossei of radial nerve

Question 4

Which nerve innervates the hypothenar muscles?

1. Recurrent branch of median nerve
2. Deep branch of ulnar nerve
3. Posterior interossei of radial nerve

Answer 4

Deep branch of ulnar nerve

Question 5

Which nerve innervates all the interossei muscles?

1. Recurrent branch of median nerve
2. Deep branch of ulnar nerve
3. Posterior interossei of radial nerve

Answer 5

Deep branch of ulnar nerve

Question 6

The median (1+2) nerves and ulnar (3+4) nerves innervate which muscle?

Answer 6

Lumbricals

Question 7

The tendons of the extensor digitorum, the lumbricals, and the interossei of each finger form….?

1. Extensor hood
2. Extensor band

Answer 7

extensor hood

Question 8

The 2 lateral bands of the extensor band travel to the …..?

1. Middle phalanx
2. Distal phalanx

Answer 8

Distal Phalanx

Question 9

Which is the primary flexors of the MP joints in the extensor hood?

1. Tendons of extensor digitorum
2. Interossei
3. Lumbricals

Answer 9

Interossei.

Question 10

Nerve that provides sensory information to the palmar surface of the first 3.5 digits:

1. Median
2. Radial
3. Ulnar

Answer 10

Median

Question 11

Which NERVE divides into a superficial and deep branch?

1. Median
2. Radial
3. Ulnar

Answer 11

Ulnar

Question 12

Which nerve innervates the adductor pollicis?

1. Median
2. Radial
3. Ulnar

Answer 12

Deep branch of ulnar nerve

Question 13

Which palmar arch innervates the intrinsic muscles of the hand?

1. Superficial
2. Deep

Answer 13

Deep

Question 14

If metacarpophalangeal joints are extended, what muscles act to extend the IP joints?

1. Lumbricals
2. Interossei

Answer 14

Interossei

Question 15

The abductor pollicis longus acts with which joint of the thumb?

1. metacarpophalangeal
2. Interphalangeal
3. Carpometacarpal

Answer 15

Carpometacarpal