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Temporal Encoding During Unimodal and Bimodal Odor Processing in the Human Brain
Chemosensory Perception Pub Date : 2018-09-20 , DOI: 10.1007/s12078-018-9251-0 Anna Oleszkiewicz , Robert Pellegrino , Cagdas Guducu , Linda Farschi , Jonathan Warr , Thomas Hummel
中文翻译:
人脑中单峰和双峰气味处理过程中的时间编码。
更新日期:2018-09-20
Chemosensory Perception Pub Date : 2018-09-20 , DOI: 10.1007/s12078-018-9251-0 Anna Oleszkiewicz , Robert Pellegrino , Cagdas Guducu , Linda Farschi , Jonathan Warr , Thomas Hummel
Introduction
In daily life, people encounter a wide range of odors, most of which contain multiple chemical substances. So-called bimodal odors stimulate both the olfactory and trigeminal nerve, and the interaction between these two systems shapes the perception of the odor. However, temporal encoding of these sensory systems during bimodal odor processing has received limited scientific attention.Methods
To investigate this, we recorded the electrophysiological response in 17 participants to relatively unimodal olfactory (strawberry), trigeminal (l-isopulegol) and strongly bimodal (strawberry and l-isopulegol) stimuli.Results
ERP amplitudes and intensity ratings were significantly bigger for bimodal stimulation, as compared to unimodal stimulations. No significant difference was observed between N1 and P2 response latencies to olfactory and bimodal stimuli while responses to both stimuli showed longer latencies compared to the response of the trigeminal stimulus.Conclusions
Results provide further evidence of interaction between olfactory and trigeminal systems; additional activation of the olfactory system results in more vigorous electrophysiological responses and the experience of higher intensity. In addition, results indicate that the trigeminal system is faster to react to stimulation.Implications
The current study offers a view on the temporal processing of bimodal odorants that are most likely to be encountered in the environment. We link the more vigorous electrophysiological response to a more complex odorant with activation of different neural structures.中文翻译:
人脑中单峰和双峰气味处理过程中的时间编码。