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Very early olfactory event related potential can represent odor habituation

Very early olfactory event related potential can represent odor habituation
Kim, KwangsuBae, JisubMoon, Cheil
DGIST Authors
Moon, Cheil
Issue Date
The 10th IBRO World Congress of Neuroscience
Odor habituation is a process showing a decrease in response to an odor after being repeatedly exposed to it. To study the odor habituation in human, measurement of event-related potentials (ERP) has been widely used in the olfactory system as well as other sensory systems because of the high temporal resolution. According to previous odor habituation studies, ERP near 200-800ms was mostly studied. However, several studies showed that the odor signal in the central nervous system (CNS) processed earlier than 200ms. For these reasons, we studied whether olfactory ERP within 200ms may be changed in the odor habituation. To examine the change of ERP in the odor habituation, we performed the odor habituation behavior test and EEG experiments. Two odorants were used in this experiment: Heptanol and 2-acetyl pyrazine. An experimental procedure was consisted of three steps. In first step, odorants or distill water offered continuously during 30 seconds. Next, one of two odorants was offered during 2 seconds for measuring. Last step was 30 seconds of rest period. There were three different conditions: None (Distil water offered in first step), Different (two different odorants offered in first and second step) and Same (a same odorant offered in first and second step). The perceived intensity was significantly decreased under the habituation condition in the behavior test. In accordance with behavior results, we found that negative potential and positive potential within 200ms was significantly changed across the conditions and significantly correlated with the behavior test. ERP amplitude within 200ms was changed as previous studies although we observed ERP latency was also changed depending on conditions. Our studies suggest that ERP in the brain within 200ms may represent the odor habituation.
Related Researcher
  • Author Moon, Cheil Laboratory of Chemical Senses
  • Research Interests Brain convergent science based on chemical senses; olfaction; 감각신경계 기반 뇌융합과학; 후각 신경계
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Department of Brain SciencesLaboratory of Chemical Senses2. Conference Papers

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