What is the anatomy of the Radial nerve? Supply what muscles in forearm? [7/14/21]
C5 - T1 β Posterior cord β posterior to axillary artery β thru triangular interval with Radial A Profundus β enters Spiral groove 21cm above LE β leaves spiral groove 14cm from LE β cross IM septum 7cm above LE β branches into PIN/ SRN under BR
Radial nerve proper supplies 4 muscles - BR, ECRL, Anconeus and lateral part of brachialis
PIN passes between 2 heads of supinator β radial neck β Supplies 9 muscles (ECRB, Supinator, ECU, EDM, EDC, APL, EPB, EPL, EIPΒ ), the last being EIP
SRN arises 9cm from radial styloid β anatomical snuff box
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Muscles that radial nerve supply?
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What are the 4 levels of Radial nerve Palsy?
Axilla - Saturday night palsy
Mid shaft - Radial nerve palsy
PIN palsy - radial tunnel syndrome
SRN - Wartenberg syndrome
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What are the areas of compression in the Radial nerve?
FLEAS - Fibrous bands at radiocapitaller joints, Leash of Henry, Medial edge of ECRB, Arcade of Frohse (aka prox edge of supinator), distal edge of supinator
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How do you make sure it is not a tendon problem?
Tenodesis test
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How do you differentiate the levels of Radial nerve palsy?
CONFIRM that it is not a tendon problem = Check tenodesis