Flashcards
Radial nerve
Cards in this deck (7)
- 1Radial nerve-arises from posterior cord of brachial plexus with nerve contributions from C5-T1
- 2Pathway1. C5-T1 & posterior spinal cord
2. through the spiral groove of the humerus & under the fibrous arch of the triceps coursing posterolateraly down arm
3. then winds around the radial head anteriorly into the radial tunnel
4. passes under the archade of frohse & comes back posteriorly to travel down the posterior lateral forearm to thumb and index finger - 3muscle innervations- triceps
- brachioradialis
- extensor carpi radialis
- extensor digiti minimi
- abductor pollicus longus
-extensor indicis
-anconeus
-supinator
-extensor digitorum
-extensor carpi ulnaris
- extensor pollicus brevis - 4compression sites1. under lateral head of triceps in upper arm(compression from throwing/weights)
2. Radial tunnel syndrome:
- anterior to the radial head as the nerve enters the tunnel, active supination in flexion will cause lateral elbow pain
- blood vessels can compress the nerve as they spread across the tunnel = pain & weakness with exertion
- arcade of frohse (fibrous band of supinator ms) will cause weak finger extension & ulnar wrist extension.
- pain with full passive pronation w/ wrist flexion & pain with resisted supination
- lesions in tendonal margin of radial extensors may compress nerve - 5S/S-listed in compression sites
- C7 DTR may be affected
- sensory changes in posterior arm, forearm into thumb, index and middle finger. - 6AssessmentTest with ULTT 3
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Information
- Description
- college Ortho (Upper limb nerves) Flashcards on Radial nerve, created by Keisha Whisken on 04/10/2015.
- Created by
- Keisha Whisken · Oct 2015
- Updated
- May 13, 2016
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