Indian Journal of Psychological Medicine
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Year : 2010  |  Volume : 32  |  Issue : 2  |  Page : 93-98

Functional neuro-imaging and post-traumatic olfactory impairment

1 Iowa City, Iowa, USA
2 Department of Human Services, Willmar, Minnesota, USA
3 Department of Psychology, Woodland Centers, Willmar, Minnesota, USA
4 Department of Pediatrics, Roy and Lucille Carver School of Medicine, University of Iowa, Iowa City, Iow, USA

Correspondence Address:
Steven Thurber
Woodland Centers, 1125 SE Sixth Street, Willmar, Minnesota 56201
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0253-7176.78504

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Objective: To evaluate via a research literature survey the anterior neurological significance of decreased olfactory functioning following traumatic brain injuries. Materials and Methods: A computer literature review was performed to locate all functional neuro-imaging studies on patients with post-traumatic anosmia and other olfactory deficits. Results: A convergence of findings from nine functional neuro-imaging studies indicating evidence for reduced metabolic activity at rest or relative hypo-perfusion during olfactory activations. Hypo-activation of the prefrontal regions was apparent in all nine post-traumatic samples, with three samples yielding evidence of reduced activity in the temporal regions as well. Conclusions: The practical ramifications include the reasonable hypothesis that a total anosmic head trauma patient likely has frontal lobe involvement.

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