Flashcards in Nerves & Vasculature Deck (68)
Where does the Brachial Plexus travel?
travels between anterior and middle scalenes, deep to clavicle, deep to pec minor, through axilla to branch out into the arm
The nerves of the arm are the 5 terminal branches of the brachial plexus, which are the:
What's Thoracic Outlet Syndrome?
dysfunction of the upper arm, shoulder -- it doesn't tell us exactly what is impinged
What does the radial nerve supply?
triceps, anconeus, brachioradialis, supinator, forearm extensors, snuff box muscles, dorsum of hand
What does the ulnar nerve innervate?
flexor carpi ulnaris and medial 1/2 of flexor digitorum profundus, hypothenar muscles, medial lumbricals (3 and 4), adductor pollicis, palmaris brevis, the interossei (all)
What nerve is superficially exposed between the olecranon and medial epicondyle?
ulnar nerve (funny bone) (it's around hook of hamate, so long sustained pressure, FOOSH, etc. can affect it)
What innervates the hypothenar eminence and 3rd-4th lumbricals?
What's the only nerve that travels through the carpal tunnel?
What does the median nerve supply?
(almost all the anterior forearm muscles), wrist and hand, thenar muscles (thenar emminence), lateral lumbricals (1 and 2), lateral FDP
What's the most common impairment caused by impingement of the median nerve?
carpal tunnel syndrome
What kind of deformity can be caused by injury of median nerve?
Ape Hand deformity (loss of opposition where thumb aligns with other digits)
Where does the musculocutaneous nerve travel and what does it supply?
-passes through the coracobrachialis down the arm between the biceps and brachialis muscles
-biceps brachii, brachialis, coricobrachialis (basically anterior arm)
Where does the axillary nerve travel?
passes below the GH joint capsule around the surgical neck of the humerus (under head of humerus) (regimental badge area)
What does the axillary nerve supply?
supplies deltoid, teres minor, long head of triceps (along with radial nerve)
Which nerve is likely to be injured with dislocation of humerus?
What does the long thoracic nerve supply?
serratus anterior (injury might result in scapular winging (this is especially visible during pushup)
What does dorsal scapular nerve supply?
levator scapula and rhomboids (with injury, might see protraction of scapula, depression of scapula)
Where does the radial nerve travel?
passes along the posterior humerus in the radial groove (deep to triceps) and into the posterior forearm
Where does the median nerve travel?
passes down the medial arm (with no branches in the axilla or arm) through the cubital fossa, deep into the forearm, through the carpal tunnel and into the hand
Where does the ulnar nerve travel?
passes down the medial arm, through the cubital tunnel (the tunnel formed by the medial epicondyle anteriorly and the olecranon posteriorly), into the anterior forearm (medial side), and into the hand between the pisiform and the hook of the hamate (the tunnel of Guyon)
Generally what is the brachial plexus divided into?
Where does the femoral artery start, what does it branch into, and where is it superficially exposed?
-starts around L4 then branches into external and internal iliac arteries
-superficially exposed around the femoral triangle
The abdominal aorta travels down the midline before splitting into the:
left and right common iliac arteries
Where does the popliteal artery start and what does it supply?
-starts at the adductor hiatus
-supplies knee joint
Where do the anterior and posterior tibial arteries start and where do they travel?
-start at the inferior border of the popliteus
-travel anteriorly and posteriorly to the tibia
Which artery passes posteriorly to the medial malleolus and supplies the sole of the foot?
posterior tibial artery (palpable pulse behind medial malleolus)
After the anterior tibial artery passes over the ankle joint, it becomes the:
dorsalis pedis artery (palpable pulse over navicular)
Where can pulses be palpate in the leg and what arteries are being palpated?
-femoral triangle; femoral artery
-behind the knee; popliteal artery
-over the navicular; dorsalis pedis artery
-behind medial malleolus; posterior tibial artery
Which arteries supply the head and neck of the femur?
medial and lateral circumflex femoral arteries and the artery in the ligament of the head of the femur