Blue Boxes 1: Arm and Cubital Fossa/Forearm/Hand Flashcards Preview

IUSM Anatomy KG > Blue Boxes 1: Arm and Cubital Fossa/Forearm/Hand > Flashcards

Flashcards in Blue Boxes 1: Arm and Cubital Fossa/Forearm/Hand Deck (35)
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What does the biceps reflex test?

Musculocutaneous nerve and the C5 and C6 spinal cord segments


What is biceps tendinitis?

Inflammation of the tendon of the long head of the biceps that moves back and forth withing the bicipital groove inside its synovial sheath


Where is the common place for the biceps tendon to tear?

From its attachment to the supraglenoid tubercle of the scapula


What is the clinical term for stopping bleeding through manual or surgical control of blood flow?



Where is the best place to compress the brachial artery to control hemorrhage?

Medial to the humerus near the middle of the arm


How long can muscles and nerves tolerate ischemia?

Up to 6 hours


What is ischemic compartment syndrome?

When scar tissue replaces necrotic tissue and causes the involved muscles to shorten permanently


A midhumeral fracture may injure what nerve?

Radial going through the radial groove


Will a lesion of the radial nerve in the redial groove paralyze the triceps?

No because of the high origin of the nerves to two of its three heads, only medial head is affected


A musculocutaneous nerve injury results in the paralysis of what muscles?

coracobrachialis, biceps, and brachialis


What is the cutaneous innervation of the musculocutaneous nerve

the lateral antebrachial cutaneous nerve


What is the characteristic clinical sign of radial nerve injury?

wrist drop


What vein is most commonlyy selected for venus punctures?

Median cubital


What provides some protection during venus blood draws in the cubital fossa region?

bicipital aponeurosis
It separates the median cubital vein from the underlying brachial artery and median nerve


Where is tennis elbow pain felt?

Over the lateral epicondyle, they often feel pain when they open a door or lift a glass
Tennis elbow is a problem with tendons


What tendon usually causes the pain in tennis elbow?



What is mallet finger?

The extensor tendon is torn off the distal ip joint


Why is a fracture of the olecranon common?

Because the olecranon is subcutaneous and protrusive


Why is pinning usually required to repair a fractured olecranon?

The fractured olecranon is pulled away by the active and tonic contraction of the triceps.


Where on the hand are synovial cysts usually found?

Dorsum of the wrist
The distal attachment of ECRB tendon to the base of the 3rd metacarpal


Where is the common place to measure pulse rate?

Where the radial artery lies on the anterior surface of the distal end of the radius, lateral to the tendon of the FCR


Why shouldn't you use the pulp of the thumb when measuring the radial pulse rate?

Because the thumb has its own pulse


When a superficial vessel is pulsating near the wrist, it is probably a superficial what?

Radial artery


Is FDP affected when the median nerve is severed in the elbow?

Only the lateral head of FDP would be affected, the medial part is innervated by the ulnar


What lesion produces the hand of benediction?

Median nerve lesion


When the anterior interosseous nerve is injured, what is affected?

The thenar muscles are unaffected, by partial paralysis of the flexor digitorumm profundus and flexor pollicis longus occurs


Anterior interosseous syndrome is characterized by what hand position?

Abnormal "pinch" sign rather than a normal "ok" sign
Can't flex the distal IP joint of first finger (FDP) and the IP of the thumb (FPL)


What nerve is compressed in pronator syndrome?

The median nerve is compressed between the heads of the pronator teres.
Often caused by activities that require consistent pronation


Communication between median and ulnar nerves is uncommon. What clinical challenge does it provide?

Even if there is a complete lesion of one nerve, some muscles may not be paralyzed


Where are the common places for the ulnar nerve to become entraped?

Posterior to the medial epicondyle of the hmerus
In the cubital tunnel between the humeral and ulnar heads of the FCU
In the hand
In Guyon's Canal