Hand

Question 1

What are intrinsic muscles of the hand responsible for?

Answer 1

Muscles in the hand itself

Responsible for the fine motor functions of the hand

Question 2

What are extrinsic muscles of the hand responsible for?

Answer 2

Located in the anterior and posterior compartments of the forearm
They control finger flexion and extension and movements of the wrist

Question 3

Muscles of the thenar eminence

Answer 3

Abductor pollicis
Abductor pollicis brevis
Flexor pollicis brevis
Opponens pollicis

Question 4

Innervation of the thenar eminence

Answer 4

Median nerve

Ulnar nerve = adductor pollicis

Question 5

Muscles of the hypothenar eminence

Answer 5

Flexor digiti minimi brevis
Abductor digit minimi
Opponens digiti minimi

Question 6

Innervation of the hypothenar eminence

Answer 6

Ulnar nerve

Question 7

Attachment of the lumbricals

Answer 7

Tendons of flexor digitorum profundus

Question 8

Innervation of the lumbricals

Answer 8

Median nerve: lateral 2 lumbricals

Ulnar nerve: medial 2 lumbricals

Question 9

Action of the lumbricals

Answer 9

Flex MCP and extend PIP and DIP joints

Question 10

Action of the interossei

Answer 10

Abduction of the digits: dorsal interossei (DAB)
Adduction of the digits: palmar interossei (PAD)
All flex MCPS and extend IPJs

Question 11

Innervation of the interossei

Answer 11

Ulnar nerve