IMR Press / JIN / Volume 18 / Issue 1 / DOI: 10.31083/j.jin.2019.01.103
Open Access Original Research
The effect of odor exposure time on olfactory cognitive processing: An ERP study
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1 School of Electromechanic Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China
2 Department of Radiation Medicine, Fourth Military Medical University, Xi’an 710032, China
3 Institute of Social Psychology, School of Humanities and Social Sciences, Xi’an Jiaotong University, Xi’an 710049, China
4 School of Psychology, Shaanxi Normal University, 199 South Chang’an Road, Xi’an 710062, China
5 College of Automotive Engineering, Chongqing University, Chongqing 400044, China
*Correspondence: (Junye Liu); (Haiyang Lang)
# These authors contributed equally.
J. Integr. Neurosci. 2019, 18(1), 87–93;
Submitted: 10 January 2018 | Accepted: 29 April 2018 | Published: 30 March 2019
Copyright: © 2019 Tang et al. Published by IMR press.
This is an open access article under the CC BY-NC 4.0 license (

The present study aimed to investigate the effects of stimulus time duration on central nervous odor processing. Twenty-one young healthy males participate in our study. There are three odor mixtures in this study and every odor mixture has two different duration time (300 ms; 500 ms). The odor was presented via a computer - controlled olfactometer and EEG was recorded from 64 scalp locations. At behavioral level, the longer the odor stimulus was presented, the greater the concentration was perceived by participants. Electrophysiological data showed that longer duration time lengthened the latency of Negative waves of about 200 ms appeared in stimulation (N2) and Positive waves of about 300 ms appeared in stimulation (P3) components, besides, have a larger N2 amplitude than the shorter duration time condition in the mid-frontal and left frontal-temporal areas. These results revealed that duration time of odor mixture do have an influence on the central nervous odor processing.

Odor mixture
oddball paradigm
odor processing
event-related potentials
Figure 1.
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