Central Processing of Odor Concentration is a Temporal Phenomenon as Revealed by Chemosensory Event-Related Potentials (CSERP)
| Autor: | Roman Ferstl, Bernfried Sojka, Bettina M. Pause |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Adult
Male Olfactory system Olfactory Nerve Physiology Central nervous system Olfaction Stimulus (physiology) Receptors Odorant Behavioral Neuroscience Event-related potential Physiology (medical) medicine Humans Attention Trigeminal Nerve Evoked Potentials Sense Organs Sensory Systems Olfactory stimulus Smell Electrophysiology medicine.anatomical_structure Odor Odorants Female Factor Analysis Statistical Psychology Neuroscience psychological phenomena and processes |
| Zdroj: | Chemical Senses. 22:9-26 |
| ISSN: | 1464-3553 0379-864X |
| DOI: | 10.1093/chemse/22.1.9 |
| Popis: | Chemosensory event-related potentials (CSERP) can be used to examine central nervous odor processing. An important question for understanding odor perception is how different concentrations are processed. In the present study two odors were chosen which activate either the olfactory (linalool) or the trigeminal (menthol) system. Both odors were presented to 11 subjects in four different concentrations. Four subjects had to attend actively to the odors while the others perceived the odors under passive attention. The results showed that increased concentrations of the olfactory stimulus resulted in shorter latencies of the N1 component but did not affect the amplitudes of the CSERP. However, the amplitudes of the stimulus dependent, exogenous components (N1, P2) increased with higher concentrations of the trigeminal stimulus. The amplitude of the late positive complex, which reflects endogenous processes, was usually larger when the odorous stimuli had to be attended to actively. It is concluded that olfactory intensity coding results in a qualitatively different but not in a stronger neuronal response of the human brain. |
| Databáze: | OpenAIRE |
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