Following a 1 month period of intermittent diffuse symptoms (seemingly of a neurological nature e.g. 48hr period of right leg weakness, 72 hour period of left arm paraesthesia) I visited a neurologist who conducted a brief clinical exam and detected signs of "pyramidal drift" in the left upper extremity. I was wondering what the underlying cause of this clinical sign might be (i.e. the scope of conditions that might produce this as a symptom). Also, I have a previous history of left shoulder instability/poor biomechanics. Is there a possibility that this sign may simply represent a reduction in proprioception in the shoulder girdle complex?
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