Deep brain stimulation and cognitive outcomes among patients with Parkinson’s disease: A historical cohort study

Allison L. Hansen, Janina Krell-Roesch, Kristin A. Kirlin, Martin M. Limback-Stokin, Kimberly Roesler, Stefanie N. Velgos, Mark K. Lyons, Yonas E. Geda, Shyamal H. Mehta

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Objective: Deep brain stimulation (DBS) is an effective treatment for motor symptoms of Parkinson’s disease; however, there is conflicting literature about the effect of DBS on cognitive function. The authors conducted a historical cohort study involving patients with Parkinson’s disease who underwent DBS of the globus pallidus pars interna (GPi; N=12) or subthalamic nucleus (STN; N=17). Methods: The authors i nvesti gated di fferences i n four neuropsychol ogi cal test scores at 6 months post-DBS (follow-up) as compared with baseline (i.e., Boston Naming Test, WAIS Verbal Comprehension Index [WAIS-VCI], Working Memory Index [WAIS-WMI], and Processing Speed Index [WAIS-PSI]). Results: GPi DBS patients showed no difference between baseline and follow-up on any neuropsychological test. STN DBS patients had lower scores indicating decreased performance at follow-up as compared with baseline on WAIS-PSI (mean [SD], 91.47 [10.42] versus 81.65 [12.03]; p=0.03). There was a significant (p=0.008) difference between the change in baseline to follow-up scores on the WAIS-VCI for the STN DBS and GPi DBS groups (i.e., STN DBS patients scored lower at the 6-month follow-up compared with baseline, whereas GPi DBS patients scored higher). Conclusions: GPi may be a preferred target for DBS in patients with Parkinson’s disease when considering cognitive outcomes.

Original languageEnglish (US)
Pages (from-to)196-200
Number of pages5
JournalJournal of Neuropsychiatry and Clinical Neurosciences
Issue number3
StatePublished - Jul 2019
Externally publishedYes

ASJC Scopus subject areas

  • Clinical Neurology
  • Psychiatry and Mental health


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