Smile without euphoria induced by deep brain stimulation: a case report

Takashi Morishita, Kelly D. Foote, Derek B. Archer, Stephen A. Coombes, David E. Vaillancourt, Anhar Hassan, Ihtsham U. Haq, Janine Wolf, Michael S. Okun

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Poststroke central pain (PSCP) can be a debilitating medication-refractory disorder. We report a single case where right unilateral ventral capsule/ventral striatum (VC/VS) deep brain stimulation was used to treat PSCP and inadvertently induced a smile without euphoria. The patient was a 69 year-old woman who had a stroke with resultant dysesthesia and allodynia in her left hemibody and also a painful left hemibody dystonia. In her case, VC/VS stimulation induced a smile phenomenon, but without a euphoric sensation. This phenomenon was different from the typical smile responses we have observed in obsessive-compulsive disorder cases. This difference was considered to be possibly attributable to impairment in the emotional smile pathway.

Original languageEnglish (US)
Pages (from-to)674-678
Number of pages5
Issue number6
StatePublished - Nov 2 2015


  • chronic pain
  • deep brain stimulation
  • smile
  • ventral capsule
  • ventral striatum

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Clinical Neurology


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