Table 3.

Comparison of outcomes of deep brain stimulation in the subthalamic nucleus versus globus pallidus internus

Outcomes	GPi	STN
Bradykinesia	+ +	+ +
Rigidity	+ +	+ +
Tremor	+ +	+ +
Quality of life	+ +	+ +
Dyskinesia reduction	+ +	+
Stimulation-induced dyskinesia	−	−−
Medication reduction		+ +
Flexibility of long-term medication adjustments	+ +
Cognitive adverse effects	−	−−
Mood adverse effects	−	−−
Gait adverse effects	−	−−
Speech and swallowing adverse effects	−	−−
Ease of programming	+ +
Reduced battery consumption		+ +
Ability to use one lead	+ +

+ slight benefit; ++ clear benefit; − rarely occurring; −− more commonly occurring