Body-Brain Waves - 27th September '24 - Talk by Martin Schaefer

Body-Brain Waves - 27th September '24 - Talk by Martin Schaefer

by Martin Schaefer

Life & Natural Systems Neuroscience PSANNeurosciencesPSAN5Cognitive and behavioural neuroscience
🎙 Martin Schaefer 👥 23 📅 November 7, 2024 ⏱ 17 min 👁 28 📄 original study 🧭 2026-08-18
Available in: English (current) Français

Keywords

pupil sizerespirationlocus coeruleusolfactory bulbreplication

Summary

Martin Schaefer presents his research on the pupillary-respiratory phase effect, showing that pupil size systematically varies with the breathing cycle. He begins with a systematic review revealing inconclusive evidence, then conducts experiments with 50 participants at rest, finding smaller pupils during inhalation and larger during exhalation. He replicates this with another 50 participants using pre-registered methods. Further experiments with 112 participants during a visual task show the effect becomes clearer with longer recordings. He also explores passive vs. active breathing, finding similar patterns, and tests individuals with congenital anosmia (lacking olfactory bulbs), showing the effect persists, indicating the olfactory bulb is not necessary. The effect size is around 0.2 mm (4-5% of pupil size). Limitations include variability across cycles and participants, and open questions about the underlying mechanism and behavioral impact.

131 words

Critical Evaluation

Value of the Information & Strength of the Argument

The talk provides valuable insights into a relatively understudied phenomenon, systematically addressing gaps in the literature. The argumentation is solid, building from a systematic review to multiple experiments with replication and extension. The speaker clearly explains methods and results, and acknowledges limitations. The use of pre-registration and multiple conditions strengthens the findings.

Scientific Rigor, Source Quality, Title Accuracy

The research appears rigorous, with a systematic review and pre-registered replication. However, no specific sources are cited in the talk, and the description only links to the conference website. The title accurately reflects the content, focusing on body-brain interactions. The talk is part of a scientific series, suggesting a peer-reviewed context, but the lack of explicit citations limits verifiability.

126 words

Title / Content Match

The title accurately reflects the content: a talk on body-brain interactions, specifically the pupillary-respiratory phase effect.

Quality & Reliability

8/10

The talk presents original research with a systematic review, pre-registered replication, and multiple experiments. Methods are described, but peer-reviewed publication is not mentioned.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

  • waves-conference.com — Conference series website mentioned in description

Concurring Sources

  • waves-conference.com — Conference series website mentioned in description

Contribution & Novelties

This talk contributes original findings on the pupillary-respiratory phase effect, systematically characterizing the relationship between breathing and pupil size across multiple conditions. It challenges previous assumptions by showing the effect is robust and not dependent on the olfactory bulb. The research is novel in its comprehensive approach and replication.

Pour aller plus loin :

87 words

Radar Profile

The radar profile shows high scores across all dimensions, indicating a well-rounded presentation with strong information content, quality, technical depth, and reliability. The talk is particularly strong in information quantity and reliability, reflecting the systematic approach and replication.

Reliability 8/10

💬 No comments were provided for analysis.