Plexus Lesion Proximal to dorsal root ganglion

Brachial Plexus Lesion Proximal to dorsal root ganglion
1 Axon Reflexes remain intact
   a Triple flare 1% Histamine response preserved
b Cold vasodilation (rewarming hyperemia) preserved
2 Sensory conduction normal despite anesthesia in the affected dermatome

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