Copyright
©The Author(s) 2015.
World J Psychiatr. Jun 22, 2015; 5(2): 210-221
Published online Jun 22, 2015. doi: 10.5498/wjp.v5.i2.210
Published online Jun 22, 2015. doi: 10.5498/wjp.v5.i2.210
Table 1 Description of the olfactory methods used to examine different olfactory domains
Olfactory domain | Methods by which this domain is assessed |
Passive smelling | Odorant is presented passively to the subject. Imaging done without response or overt cognitive appreciation |
Olfactory detection | Similar to passive smelling, however, the subject must press a button to signal the onset of the odorant perception |
Odour “sniffing” | Subjects are given instructions to inhale the odorant during presentation |
Olfactory intensity | Rating the odorant as to its perceived strength. Can be done by a button press (Is the odour “strong”?) |
Intensity may be assessed by ratings of odorants (e.g., VAS) outside of the scanner and presenting odours that have been rated on opposite ends of the continuum (very strong vs very weak) | |
Olfactory familiarity | Recollect prior exposure without the exact autobiographical context and also without naming. Button press if odour is “familiar” |
Olfactory hedonics (valence) | The determination of pleasantness of the odorant. |
Button press to rate whether an odorant is pleasant | |
Pleasant/Unpleasant odorant rated (e.g., VAS) outside of the scanner and presenting odours that have been rated on opposite ends of the continuum (very unpleasant to very pleasant) | |
Olfactory identification | Correct identification- those items that are correctly labeled vs those for which label is incorrect |
Olfactory identification test score used to capture most impaired, compared with normal sense of smell | |
Forced choice odour naming during scanning |
- Citation: Good KP, Sullivan RL. Olfactory function in psychotic disorders: Insights from neuroimaging studies. World J Psychiatr 2015; 5(2): 210-221
- URL: https://www.wjgnet.com/2220-3206/full/v5/i2/210.htm
- DOI: https://dx.doi.org/10.5498/wjp.v5.i2.210