Discussion Therapeutic effects of STN DBS in PD are optimized when the electrode is
placed in the dorsolateral motor territory. Ventromedial STN stimulation may result in
adverse cognitive and neuropsychiatric outcomes including transient confusion, apathy, and
reduced verbal fluency; impaired attention, working memory, and response inhibition; and
depression, anxiety, hypomania, hypersexuality, hallucinations, psychosis, and even suicide
(