Fig. 2.

Sensor level responses evoked by deep brain stimulation of the ventral intermediate nucleus of the thalamus in patients with essential tremor (unfiltered). Each sub-plot depicts the response of one patient, averaged over 3–5 channels located above sensorimotor cortex ipsilateral to stimulation. The inset shows an example of very early responses (<10 ms) for patient ET 1; the red arrow indicates a peak at 1 ms. The peak amplitude of evoked fields increased with increasing stimulation amplitude (color-coded) in all patients under study.