Neurovascular Flashcards
what accompanies the ulnar n. in the distal forearm?
ulnar artery - medial to ulnar nerve
ulnar artery course?
emerges from neck of radius, passes deep to muscles from common flexor origin, and crossed superficially by median nerve
distally, becomes more superficial and croses in front of flexor retinaculum to become the superficial palmar arch with superficial branch of radial artery
where does the brachial artery terminate?
level of neck of radius - divides into radial and ulnar artery
what is closely related to the radial artery?
radial nerve
where does the radial artery lie in theh distal forearm?
between brachioradialis and flexor carpi radialis
can be palpated on the lateral aspect here
where does the axillary artery end?
lower border of teres major - becomes brachial artery here
what can cause ulnar nerve injuries?
elbow pathology (e.g. fractures, dislocaitons) or impingement in the wrist (Guyon’s canal)
ulnar nerve lesions cause?
weakness of intrinsic hand muscles + claw hand
finger weakness in abduction + adduction
sensory loss over digit (4 +) 5
+ Froment’s sign
check - unable to make good luck sign?
what is the ulnar paradox?
greater clawing in hand when lesion at wrist compared to elbow because higher lesions cause weakness of FDP so can’t flex the digits as much
what is Froment’s sign?
flexion of thumb when holding a piece of paper between digit 1 and 2 due to weak adductor pollicis
what does the saphenous nerve supply?
sensation over medial aspect of lower leg and foot
is the posterior br of femoral n.
only has sensory function
sural nerve provides sensation where?
over posterolateral distal third of leg
lateral foot
only has sensory function
what injury is sural n. a/w?
tibial shaft fractures
what does superficial peroneal n. supply?
anterolateral middle and distal third of leg
most of the first 4 toes
what does deep peroneal n. supply?
first and second toes
a/w tibial shaft fractures
