Brain activation during implicit sequence learning in individuals with trichotillomania

Scott L. Rauch, Christopher I. Wright, Cary R. Savage, Brian Martis, Katherine G. McMullin, Michelle M. Wedig, Andrea L. Gold, Nancy J. Keuthen

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


Trichotillomania (TTM) may be related to obsessive-compulsive disorder (OCD) and other neuropsychiatric conditions characterized by cortico-striatal dysfunction. Functional imaging studies of OCD using an implicit learning task have found abnormalities in striatal and hippocampal activation. The current study investigated whether similar abnormalities occur in TTM. Functional MRI and the serial reaction time (SRT) task were used to assess striatal and hippocampal activation during implicit sequence learning in TTM and healthy control (HC) subjects. The results for 20 age- and education-matched participants (10 TTM, 10 HC) are reported. In comparison with HC participants, those with TTM exhibited no significant differences in implicit learning, or in activation within the striatum, hippocampus, or other brain regions. The current findings do not provide evidence for cortico-striatal dysfunction in TTM. Future studies directly comparing OCD and TTM subjects are warranted to confirm the specificity of abnormal striatal and hippocampal findings during implicit sequence learning in OCD.

Original languageEnglish (US)
Pages (from-to)233-240
Number of pages8
JournalPsychiatry Research - Neuroimaging
Issue number3
StatePublished - Apr 15 2007
Externally publishedYes


  • Imaging
  • Obsessive-compulsive disorder
  • Serial reaction time
  • Striatum

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Radiology Nuclear Medicine and imaging
  • Psychiatry and Mental health


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