Anticipation-induced delta phase reset improves human olfactory perception

Ghazaleh Arabkheradmand, Guangyu Zhou*, Torben Noto, Qiaohan Yang, Stephan U. Schuele, Josef Parvizi, Jay A. Gottfried, Shasha Wu, Joshua M. Rosenow, Mohamad Z. Koubeissi, Gregory Lane, Christina Zelano

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Anticipating an odor improves detection and perception, yet the underlying neural mechanisms of olfactory anticipation are not well understood. In this study, we used human intracranial electroencephalography (iEEG) to show that anticipation resets the phase of delta oscillations in piriform cortex prior to odor arrival. Anticipatory phase reset correlates with ensuing odor-evoked theta power and improvements in perceptual accuracy. These effects were consistently present in each individual subject and were not driven by potential confounds of pre-inhale motor preparation or power changes. Together, these findings suggest that states of anticipation enhance olfactory perception through phase resetting of delta oscillations in piriform cortex.

Original languageEnglish (US)
Article numbere3000724
JournalPLoS biology
Issue number5
StatePublished - May 2020

ASJC Scopus subject areas

  • Neuroscience(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)
  • Agricultural and Biological Sciences(all)


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