Paralysis: Left basal ganglia lesion would cause right sided weakness. Left leg paralysis would be from a right sided lesion in the brain above the brain stem. A spinal cord lesion on the same side or below where the corticospinal fibers cross in the brain stem would cause left leg weakness. See you neurologist or neurosurgeon to identify the source of the left leg weakness.
Answered 5/7/2014
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