October 27, 2015 - Upper Limb II

Question 1

Demarcation Between Flexor and Extensor (Forearm)

Answer 1

Demarcation of the division between flexor (anterior) and extensor (posterior) compartments can be palpated on the medial forearm where the ulna lies directly beneath the skin.

Question 2

Innervation in Forearm

Answer 2

The posterior of the forearm is innervated via the radial nerve only.

The anterior of the forearm is innervated by the median nerve except for the flexor carpi ulnaris and half of the flexor digitorum (ulnar nerve).

Question 3

Anterior Muscles of the Forearm

Answer 3

Flexor carpi radialis

Pronator teres

Flexor carpi ulnaris

Flexor digitorum superficialis

Flexor digitorum profundus

Pronator quadratus

Question 4

Flexor Carpi Radialis

Answer 4

Originates at the common flexor origin and runs to the 2nd finger.

Question 5

Flexor Carpi Ulnaris

Answer 5

Superficial muscle on forearm.

Question 6

Pronator Teres

Answer 6

Superficial muscle on forearm.

Question 7

Flexor Digitorum Superficialis

Answer 7

Intermediate muscle in forearm.

Question 8

Flexor Digitorum Profundus

Answer 8

Deep muscle in the forearm.

Question 9

Pronator Quadratus

Answer 9

Deep muscle in forearm.

Question 10

Thumb Movements

Answer 10

Abduction is moving the thumb perpendicular to plane of hand (hold beer)

Adduction is moving it back to be parallel with the fingers

Extension is moving the thumb up

Question 11

Thenar Muscles

Answer 11

At the base of the thumb

Question 12

Hypothenar Muscles

Answer 12

Attach to the pinky finger

Question 13

Adductor Pollicis

Answer 13

Attaches beteen the middle finger and the thumb

Question 14

Lumbricals (Hand)

Answer 14

Muscles in the hand. These originate from the deep digital flexor tendons.

Question 15

Dorsal Interossei

Answer 15

Muscles on the back of the hand

Question 16

Palmar Interossei

Answer 16

Muscles on the palm side of the hand