Olfactory and chemosomatosensory function in pregnant women assessed with event-related potentials

Olofsson, Jonas; Broman, Daniel A.; Wulff, Marianne; Martinkauppi, Mikael; Nordin, Steven

doi:10.1016/j.physbeh.2005.07.022

Cited by 24 publications

(23 citation statements)

References 24 publications

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“…Second, studies using ERPs or reflex responses to intranasal trigeminal stimuli (Hummel et al, 1996a;Kendall-Reed et al, 1998) confirmed the psychophysical results presented above, i.e. a loss of olfactory sensitivity resulted in a decrease of the response to trigeminal stimuli, possible sex differences (Lundstro¨m et al, 2005;Lundstro¨m and Hummel, 2006), and variability in relation to the hormonal state (Olofsson et al, 2005).…”

Section: Electrophysiological Investigationssupporting

confidence: 73%

Olfactory/trigeminal interactions in nasal chemoreception

Brand¹

2006

Neuroscience & Biobehavioral Reviews

173

124

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Section: Electrophysiological Investigationssupporting

confidence: 73%

Olfactory/trigeminal interactions in nasal chemoreception

Brand¹

2006

Neuroscience & Biobehavioral Reviews

173

124

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“…Evidence for a high-level mechanism comes from event-related potential (ERP) data. Olofsson et al (2005) measured chemosensory ERPs in 15 pregnant and 15 non-pregnant women and found no significant differences between groups in amplitude nor latency of N1 and P1 components (which reflect sensory processing), but rather a tendency for shorter latency and higher amplitude of the more perceptual/cognitive P3 component in the pregnant group. This suggests that changes may be observed for more central levels of olfactory processing.…”

Section: Mechanisms Underlying Changes In Olfaction During Pregnancymentioning

confidence: 95%

“…It is worthy of note that pyridine, which has a trigeminal component, was used as the stimulus in Olofsson et al’s (2005) study [and in the previously mentioned Broman et al’s (2003) study that showed significantly reduced thresholds in pregnancy] and it has been suggested that perceived hyperosmia may be related to trigeminal function (Nordin et al, 2005). In addition, pyridine is an unpleasant odor, which may also have been a factor in the outcome of these studies.…”

Section: Mechanisms Underlying Changes In Olfaction During Pregnancymentioning

confidence: 99%

Pregnancy and olfaction: a review

Cameron

2014

Front. Psychol.

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Many women report a heightened sense of smell during pregnancy. Accounts of these anecdotes have existed for over 100 years, but scientific evidence has been sparse and inconclusive. In this review, I examine the literature on olfactory perception during pregnancy including measures of self-report, olfactory thresholds, odor identification, intensity and hedonic ratings, and disgust. Support for a general decrease in olfactory thresholds (increase in sensitivity) is generally lacking. There is limited evidence that some suprathreshold measures of olfactory perception, such as hedonic ratings of odors, are affected by pregnancy, but these effects are idiosyncratic. In this review, I explore the hypotheses that have been put forth to explain changes in olfactory perception during pregnancy and provide suggestions for further research.

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“…So far, there has been little theoretical integration of results from olfactory ERPs and results from RTs. Perhaps this is partly due to the fact that effects of stimulus intensity and individual differences on ERPs are profound and may overshadow more subtle cognitive processing signatures (e.g., Hummel et al, 1998; Olofsson and Nordin, 2004; Nordin et al, 2005; Olofsson et al, 2005). From the perspective of the olfactory cascade model, semantic priming paradigms may be particularly suitable to investigate ERP responses in olfactory decision-making.…”

Section: Future Directionsmentioning

confidence: 99%

Time to smell: a cascade model of human olfactory perception based on response-time (RT) measurement

Olofsson

2014

Front. Psychol.

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The timing of olfactory behavioral decisions may provide an important source of information about how the human olfactory-perceptual system is organized. This review integrates results from olfactory response-time (RT) measurements from a perspective of mental chronometry. Based on these findings, a new cascade model of human olfaction is presented. Results show that main perceptual decisions are executed with high accuracy within about 1~s of sniff onset. The cascade model proposes the existence of distinct processing stages within this brief time-window. According to the cascade model, different perceptual features become accessible to the perceiver at different time-points, and the output of earlier processing stages provides the input for later processing stages. The olfactory cascade starts with detecting the odor, which is followed by establishing an odor object. The odor object, in turn, triggers systems for determining odor valence and edibility. Evidence for the cascade model comes from studies showing that RTs for odor valence and edibility assessment are predicted by the shorter RTs needed to establish the odor object. Challenges for future research include innovative task designs for olfactory RT experiments and the integration of the behavioral processing sequence into the underlying cortical processes using complementary RT measures and neuroimaging methods.

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Olfactory and chemosomatosensory function in pregnant women assessed with event-related potentials

Cited by 24 publications

References 24 publications

Olfactory/trigeminal interactions in nasal chemoreception

Olfactory/trigeminal interactions in nasal chemoreception

Pregnancy and olfaction: a review

Time to smell: a cascade model of human olfactory perception based on response-time (RT) measurement

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