Evidence map›Paper›PMID 28384472›Full record

ArticleNeuron2017

Theta Oscillations Rapidly Convey Odor-Specific Content in Human Piriform Cortex.

Heidi Jiang, Stephan Schuele, Joshua Rosenow, Christina Zelano, Josef Parvizi, James X Tao, Shasha Wu, Jay A Gottfried

Open access · bronzeAbstract read
In one paragraph

Article in Neuron, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed, 1 pooled it
3.7field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

47 citing papers in PubMed, 1 synthesis or guideline pooled it, 84 citations in OpenAlex.

  1. Olfactory Testing in Temporal Lobe Epilepsy: a Systematic Review.Current neurology and neuroscience reports · 2020
    Pooled it
  2. Article
  3. Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Review
  9. Behavioral Relevance of Early Neural Coding of Low-Level Odor Features in Humans.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  10. IMPAIRED OLFACTORY FUNCTION IN SUBSTANCE USE DISORDER.medRxiv : the preprint server for health sciences · 2025
    Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Measurement and Analyses of Olfactory Event-Related Potentials.Methods in molecular biology (Clifton, N.J.) · 2025
    Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 1 country.

Heidi JiangDepartment of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA. Electronic address: hhjiang@u.northwestern.edu.
Stephan SchueleDepartment of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
Joshua RosenowDepartment of Neurosurgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
Christina ZelanoDepartment of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
Josef ParviziDepartment of Neurology and Neurological Sciences, Stanford University, Stanford, CA 94305, USA.
James X TaoDepartment of Neurology, University of Chicago, Chicago, IL 60637, USA.
Shasha WuDepartment of Neurology, University of Chicago, Chicago, IL 60637, USA.
Jay A GottfriedDepartment of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Psychology, Weinberg College of Arts and Sciences, Northwestern University, Evanston, IL 60208, USA. Electronic address: j-gottfried@northwestern.edu.
Northwestern University · USUniversity of Chicago · USStanford University · US

Funding

Spatiotemporal Mechanisms of Olfactory Processing in the Human BrainR01DC013243 · NIDCD · UNIVERSITY OF PENNSYLVANIA · PI GOTTFRIED, JAY A · 2013 to 2017
$1.5M
Spatiotemporal Coding in the Human Olfactory SystemR21DC012014 · NIDCD · NORTHWESTERN UNIVERSITY AT CHICAGO · PI GOTTFRIED, JAY A · 2011 to 2012
$419k
NIDCD NIH HHS R01 DC013243NIDCD NIH HHS R21 DC012014
6 · The paper itself

Abstract

Olfactory oscillations are pervasive throughout vertebrate and invertebrate nervous systems. Such observations have long implied that rhythmic activity patterns play a fundamental role in odor coding. Using intracranial EEG recordings from rare patients with medically resistant epilepsy, we find that theta oscillations are a distinct electrophysiological signature of olfactory processing in the human brain. Across seven patients, odor stimulation enhanced theta power in human piriform cortex, with robust effects at the level of single trials. Importantly, classification analysis revealed that piriform oscillatory activity conveys olfactory-specific information that can be decoded within 110-518 ms of a sniff, and maximally within the theta frequency band. This temporal window was also associated with increased theta-specific phase coupling between piriform cortex and hippocampus. Together these findings suggest that human piriform cortex has access to olfactory content in the time-frequency domain and can utilize these signals to rapidly differentiate odor stimuli.

Indexed as

AdultAmygdalaElectrocorticographyElectroencephalography Phase SynchronizationFemaleGamma RhythmHippocampusHumansMaleMiddle AgedOdorantsPiriform CortexSmellTheta RhythmYoung AdultECoGepilepsyhippocampusintracranial EEGneural oscillationsodor perceptionolfactory systemphase lockingpiriform cortextheta

Identifiers

PMID28384472
PMCPMC5480455
OpenAlexW2604354579

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.