Table 1. Monopolar Symptom Threshold Assessment. Through this Monopolar Survey, Thresholds for Tremor Amplitude Improvement and the Development of Irreversible, Stimulation-induced Side Effects were Identified per Traditional Contact Assessment. Segmented Monopolar Survey was not Conducted.

	Improvement Threshold*	Irreversible SE Threshold+	SE Description+
Left VIM
4	1.0 mA	1.2 mA	Limb ataxia
3	0.6 mA	1.2 mA	Limb ataxia
2	1.2 mA	1.0 mA	Limb ataxia and tingling
1	>2.0 mA ˆ	1.0 mA	Tingling
Right VIM
12	0.8 mA	1.2 mA	Limb ataxia
11	0.6 mA	1.2 mA	Limb ataxia
10	1.4 mA	1.6 mA	Limb ataxia and tingling
9	>2.0 mA ˆ	1.4 mA	Tingling

^*Improvement defined as any clinically evident limb tremor amplitude reduction.

⁺SE: side effect.

^Tremor reduction not achieved prior to intolerable SE.