Chemosensory Perception

, Volume 5, Issue 1, pp 46–54

Beyond Self-report: Brain Imaging at the Threshold of Odor Perception

Authors

Article

DOI: 10.1007/s12078-012-9116-x

Cite this article as:
Lorig, T.S. Chem. Percept. (2012) 5: 46. doi:10.1007/s12078-012-9116-x

Abstract

Odorants exert their effects at many levels. Most often, these stimuli are well above detection threshold and allow the investigator to use self-report or behavioral techniques to evaluate odor effects. There are, however, considerable data demonstrating effects for odor stimuli that are below sensory thresholds or are undetected by subjects. In these cases, self-report is of little use, and brain imaging has been very effective in helping to explain these findings. This paper reviews the problem of low-intensity odors and the application of a wide variety of brain imaging techniques to research on this phenomenon. Finally, a model of undetected odor effects and brain imaging is presented to help simplify the variations in nomenclature that are used to describe this field.

Keywords

Brain imagingfMRIEEGERPSmellOlfactionOdorThresholdConsciousnessSubliminalAttention

Copyright information

© Springer Science + Business Media, LLC 2012