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Time Course of Odor Categorization Processing

Time Course of Odor Categorization Processing
Bae, JisubKim, KwangsuMoon, Sun AeChoe, Han KyoungJin, YoungsunKang, Won-SeokMoon, Cheil
Issued Date
Cerebral Cortex Communications, v.2, no.4
Author Keywords
EEGgammaodor categorizingodor qualityolfactory processingolfactory systemthetatime course
The brain’s mechanisms for categorizing different odors have long been a research focus. Previous studies suggest that odor categorization may involve multiple neurological processes within the brain with temporal and spatial neuronal activation. However, there is limited evidence regarding temporally mediated mechanisms in humans, especially millisecond odor processing. Such mechanisms may be important because different brain areas may play different roles at a particular activation time during sensory processing. Here, we focused on how the brain categorizes odors at specific time intervals. Using multivariate electroencephalography (EEG) analysis, we found that similarly perceived odors induced similar EEG signals during 50–100 ms, 150–200 ms, and 350–400 ms at the theta frequency. We also found significant activation at 100–150 ms and 350–400 ms at the gamma frequency. At these two frequencies, significant activation was observed in some olfactory-associated areas, including the orbitofrontal cortex. Our findings provide essential evidence that specific periods may be related to odor quality processing during central olfactory processing.
Oxford University Press
Related Researcher
  • 최한경 Choe, Han Kyoung 뇌과학과
  • Research Interests Modulation of neural circuit; Circadian regulation of behavior and perception; Neurotechnology
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Appears in Collections:
Division of Intelligent Robotics 1. Journal Articles
Department of Brain Sciences Laboratory of Animal Behavior and Circadian rhythm 1. Journal Articles
Department of Brain Sciences Laboratory of Chemical Senses 1. Journal Articles


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