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Good evening, I am Dr Ruff, thank you for contacting us today
I am sorry to hear this. The EMG is a study which monitors the speed of an impulse, slower compared to normal implies there is something described as a lesion or impingement.
A nerve being pressed at the elbow or wrist could cause this, and therefore doesn't specifically imply there is nerve damage.
I would suggest you consider an MRI to assess this further.