Olfactory function in psychotic disorders: Insights from neuroimaging studies

doi:10.5498/wjp.v5.i2.210

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World Journal of Psychiatry

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2220-3206

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

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World J Psychiatr. Jun 22, 2015; 5(2): 210-221
Published online Jun 22, 2015. doi: 10.5498/wjp.v5.i2.210

Olfactory function in psychotic disorders: Insights from neuroimaging studies

Kimberley P Good, Randii Lynn Sullivan

Kimberley P Good, Departments of Psychiatry and Psychology and Neuroscience, Dalhousie University, Halifax NS B3H2E2, Canada

Randii Lynn Sullivan, Department of Social Work, Dalhousie University, Halifax NS B3H2E2, Canada

Author contributions: Both authors contributed to this manuscript.

Supported by In part the Department of Psychiatry Dalhousie University; The Faculty of Medicine at Dalhousie University; The Nova Scotia Health Research Fund; and the Canadian Institutes of Health Research.

Conflict-of-interest: The authors know of no conflicts of interest related to this work.

Correspondence to: Kimberley P Good, PhD, Departments of Psychiatry and Psychology and Neuroscience, Dalhousie University, Suite 4064 AJLB, 5909 Veterans Memorial Lane, Halifax NS B3H2E2, Canada. kim.good@dal.ca

Telephone: +1-902-4734250 Fax: +1-902-4733456

Received: December 2, 2014
Peer-review started: December 4, 2014
First decision: January 20, 2015
Revised: February 20, 2015
Accepted: March 16, 2015
Article in press: March 18, 2015
Published online: June 22, 2015
Processing time: 198 Days and 17.3 Hours

Core Tip

Core tip: Olfactory identification, familiarity, and memory deficits are consistently noted in patients with psychotic disorders relative to age-matched controls. Olfactory intensity ratings remain intact while olfactory hedonics and detection threshold show inconsistent findings. This review found no consistent differences in functional activity in amygdala and pirifom cortices in psychotic patients relative to control subjects. Secondary olfactory cortices were abnormally activated in psychosis patients, however. Further methodologically consistent research is required for better understanding the neurobiology of olfactory deficits in psychotic disorders. The authors recommend examining sex differences contrasting olfactory subgroups (impaired vs intact) in future examinations.