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proximal motor NCS for upper brachial plexus conduction block?
I'm curious to learn from others' experience on use of proximal motor nerve conduction studies in assessment of conduction block affecting the upper brachial plexus elements. Do you use motor NCS recording proximal upper limb muscles (e.g., biceps brachii, deltoid, spinati, etc.) specifically to assess for conduction block across the brachial plexus, and if so, have you found some (C5-6) muscles more reliable than others for this purpose? Or, conversely, have you not found this to be a useful diagnostic tool for this particular indication?
I have not personally used these a lot, and I hope to learn from others' experience.
Thanks for any insights from the group. Happy New Year to our EDX/NM community here!
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