Circadian rhythm and desensitization in chemosensory event-related potentials in response to odorous and painful stimuli
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Olfactory (H2S) and trigeminal (CO2) event-related potentials (ERPs) were studied with respect to circadian rhythm and desensitization. ERPs, perceived odor and pain intensity, oral temperature, blood pressure, heart rate, nasal volume, and sleepiness were assessed four times at 04:00, 08:00, 12:00, 16:00, 20:00, and 24:00 hr in five young men. For each of these 24 sessions per participant, H2S and CO2 were each presented in 15 series of five stimuli with a 5-s ISI within and 30-s; ISI between series. ERP amplitudes, but not latencies, followed a circadian rhythm (largest at 16:00 and smallest at 04:00) similar to oral temperature and opposite to sleepiness. Amplitudes decreased (most pronounced at 16:00 and 20:00) and latencies increased with repeated stimulation, suggesting desensitization, in accordance with odor and pain intensity. These findings imply that circadian rhythm and desensitization should be considered in chemosensory ERP studies.
Details
Original language | English |
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Pages (from-to) | 612-619 |
Number of pages | 8 |
Journal | Psychophysiology |
Volume | 40 |
Issue number | 4 |
Publication status | Published - Jul 2003 |
Peer-reviewed | Yes |
External IDs
PubMed | 14570168 |
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Scopus | 0038495569 |
ORCID | /0000-0001-9713-0183/work/146645635 |
Keywords
Keywords
- Csserp, Oerp, Adaptation, Circadian rhythm, Event-related potentials, Habituation