Ant210 Forearm

Front 1

which artery can you check the pulse on, from the cubital fossa to the wrist, anterior to the styloid process?

Back 1

radial artery

Front 2

What muscles are involved in pronation of the forearm/hand and what is their innervation?

Back 2

pronator teres and pronoator quadratus, both are innervated by the median nerve. C7, C8

Front 3

What muscles are involved in supination of the forearm/hand and what is their innervation?

Back 3

Biceps brachii (exception)
innervated by the Musculocutaneous n. C6

and Supinator
Radial n C8

Front 4

which type of muscles are innervated by the median nerve with 1½ exceptions? Flexor – pronator OR Extensor – supinator

Back 4

Flexor – pronator

Front 5

which compartment of muscles arise by a common tendinous attachment on the medial epicondyle of the humerus?
Extensor – supinator OR
Flexor – pronator

Back 5

Flexor – pronator

Front 6

Extensor – supinator OR
Flexor – pronator muscle compartment:
innervated by the radial nerve...

Back 6

Extensor – supinator

Front 7

Extensor – supinator OR
Flexor – pronator muslce compartment:
muscles arise by a common tendon from the lateral epicondyle of the humerus...

Back 7

Extensor – supinator

Front 8

What is the hand of benediction and what does it inidicate?

Back 8

The median nerve could become entrapped, severed, or compressed near the elbow where it enters the forearm between the heads of the pronator teres muscle.

Flexion of the DIP joints of the 4th & 5th fingers is not affected because the medial part of the FDP is supplied by the ulnar nerve.
A person with this syndrome will present with the inability to fully flex the 2nd & 3rd fingers because the median nerve also supplies the 2nd & 3rd lumbricle muscles which aid in metacarpophalangeal joint flexion.
When a person attempts to make a fist, the 2nd & 3rd fingers remain partially extended while the 4th & 5th digits flex normally because of ulnar innervation.
This is known as the “hand of benediction.”

Front 9

What is clawhand and what does it indicate?

Back 9

ulnar nerve injury, There is difficulty making a fist because patient cannot flex their 4th & 5th digits at the distal interphalangeal joints – this is known as a clawhand (main en griffe)

Front 10

are deep veins or supericial veins paired in the arm?

Back 10

deep

Front 11

What is Guyen's Canal?

Back 11

The deep branches of the ulnar artery & nerve pass into the hand through (Guyen’s Canal), fibro-osseous tunnel btwn. The hook of the hamate & flexor tendons

Front 12

The major arterial contribution to the superficial arch of the hand is from the what?

Back 12

ulnar artery

Front 13

The major arterial contribution to the deep palmar arch of the hand is from the what?

Back 13

radial artery

Front 14

what is Dupuytren’s Contracture?

Back 14

This contracture is a disease of the palmar fascia resulting in a thickening of the fibrous bands on the palmar surface of the hand & fingers

Front 15

is dupuytrens contracture unilateral or bilateral (one or both hands).?

Back 15

bilateral

Front 16

carpel tunnel occurs when which nerve gets pinched?

Back 16

median nerve.

Front 17

Where is the cubital tunnel and what passes through it?

Back 17

posterior passage over the medial condyle of the elbow allowing passage of the ulnar nerve (aka funny bone).

Front 18

Supination of the hand and forearm would be diminished by loss of radial nerve function. But one very powerful supinator would remain intact and unaffected, namely:

Back 18

Biceps brachii - biceps brachii supinates the arm, but it is not innervated by the radial nerve--instead, it is innervated by the musculocutaneous nerve. So, it would not be affected by a radial nerve injury. Brachialis is also innervated by the musculocutaneous nerve, but it is only involved with flexing the forearm--it is not a supinator. Brachioradialis flexes the elbow and assists in pronation and supination--it is innervated by the radial nerve and would be paralyzed after a radial nerve injury. Flexor carpi radialis is a flexor, not a supinator--it is innervated by the median nerve. Finally, supinator is innervated by the deep radial nerve.