Hand

Question 1

what nerve innervates all of the extensors of the hand as well as the Abductor policis brevis

Answer 1

radial nerve and spinal segments C6, C7, and C8.

Question 2

What’re the muscles of the hand that the radial nerve innervates?

Answer 2

extensor digitorum, extensor indicis, extensor digiti minimi, extensor policis brevis/longus, abd. pollicis longus

Question 3

What are intrinsic muscles of the hand?

Answer 3

distal to carpals, fine motor control and precision,

Thenar, hypothenar and deep palm.

Question 4

what’re the extrinsic muscles of hand?

Answer 4

thumb and finger, proximal attachment above the proximal wrist.

Question 5

what is the action of the lumbricales?

Answer 5

flexes the MCP’s while extending the PIP’s and DIP’s

Question 6

what is the action of the dorsal interossei?

Answer 6

abduction of the MCP’s `

Question 7

What is the action of the palmar interossei?

Answer 7

adduction of the MCP