Stereotaxic Vim thalamotomy for treatment of tremor.

Pathological tremor is alleviated almost totally and immediately, also sustainedly, by a selective surgical lesion within the ventral part of the Vim thalamus. Since the Vim receives its proprioceptive sense from the periphery, tremor is interpreted as the phenomenon based on the circuit involving both central and peripheral mechanisms. The importance of the role of the spinal reflex mechanisms is discussed.