Blood Supply 1
The cephalic vein is lateral, the basilic vein is medial
This may be easier on a baby, but when you palpate in the medial bicipital groove what vessel are you feeling?
Brachial
Damage to the radial nerve may result in what common presentation?
Wrist drop
Compression of the posterior cord of the brachial plexus. Results in loss of radial nerve innervation and loss of axillary nerve innervation. MAY see loss of subscapular nerve innervation
Compression of the ulnar nerve at the wrist is common in cyclists due to long periods of time spent with their hands on their handlebars. What is the fancy name for this?
Guyon's canal syndrome
From lateral to medial what is found in the cubital fossa?
TAN
Tendon of biceps brachii, brachial Artery, median Nerve
This superficial vein connects the cephalic and basilic veins and is often used to start an IV in a patient's arm.
The median cubital vein
Which skin area would you test to determine whether there is damage to the musculocutaneous?
The lateral forearm
Where on the skin would you test for ulnar nerve damage?
Tip of the pinky.
In a proximal median nerve palsy, when asked to make a fist which digits will flex?
The axillary nerve travels with which major artery in the brachium?
The posterior circumflex humeral
The major blood supply to the superficial palmar arch is from what artery?
Ulnar artery
Weak elbow flexion may result from loss of innervation from this nerve that pierces the coracobrachialis
Musculocutaneous
Little bit of the thenar, more than half of the dorsum of the hand.
Damage to the roots of C5-C6 can occur for a number of reasons and will present with a classic "Waiter's Tip Position". What are these patients at increased risk of?
Increased risk of shoulder dislocation
The brachial artery will bifurcate into the radial and the ulnar artery. The ulnar artery has a common "stump" off of it before continuing as the ulnar artery. What are the branches of that "stump"?
The anterior and posterior interosseous.
The radial artery supplies the princeps pollicis artery and the radialis indicis
Lack of feeling at the tip fo the index finger suggests there is a problem with which nerve?
Median nerve
Weakened/loss of thumb opposition and wasting of the thenar eminence is characteristic of injury to which nerve?
Median nerve. Can see this in carpal tunnel syndrome
This paralysis may result from the alien's arm getting pulled during delivery.
What artery travels along the posterior humerus?
What are lymphatics?
DCOM doesn't care about the lymph as we have never been asked a single question lymph ever. Therefore lymphatics exist only in our imaginations
How can you test for median nerve damage?
Pronation of the forearm, opposition of the thumb, flexion at the wrist, flexion of the fingers.
Supra/infraspinatus, deltoid, teres minor, biceps, brachialis, pectoralis major (clavicular head), supinator, latissimus dorsi, triceps, long extensors of wrist/fingers
Compression of the ulnar nerve behind the medial epicondyle may result in difficulty making a fist and radial deviation during wrist flexion. Which muscles of the arm are affected?
Flexor carpi ulnaris, and the medial 2 bellies of flexor digitorum profundus