Arthur Bertin Barraud

Arthur Bertin Barraud

Phd candidate in Neuroscience

CENTURI PhD Student (2026-10 / 2029-09): Neuromodulatory control of predictive processing in visual cortical circuits

Summary

The brain constantly generates internal models to predict sensory input, and perception arises from comparing these predictions with external reality—a process best understood as predictive processing. How this computation is implemented and regulated in cortical circuits remains unknown. This PhD project will explore how serotonin and norepinephrine—key modulators of mood, arousal, and attention—shape predictive processing in the mouse visual cortex.

The candidate will combine computational modelling (Perrinet lab, INT) and experimental neuroscience (Rancz lab, INMED) to link theory and physiology. Biologically realistic spiking and normative models will generate testable predictions, validated through in vivo electrophysiology, imaging, and optogenetic manipulation during sensory-motor mismatch tasks.

This iterative model–experiment approach will reveal how neuromodulators balance internal predictions with sensory evidence, providing insight into the healthy brain and a foundation for understanding its dysfunction in mental disorders.

Education

Master 2 Computational and Mathematical Biology (CMB), 2025-2026

  • Institution: Aix-Marseille Université, Faculté des Sciences de Luminy; the programme is the Computational and Mathematical Biology track of the Master in Integrative Biology and Physiology, run with the Turing Centre for Living Systems (CENTURI).
  • Result: ranked first of a cohort of 8 students, with an average of 16.415/20.
  • Head of the master: Florence Hubert.
  • Source: certificate issued on 2026-02-20 by the head of the master.
Education
  • Phd candidate in Neuroscience, 2026

    Aix-Marseille Université

  • M2 Computational and Mathematical Biology (CMB), Integrative Biology and Physiology (ranked 1st of 8, average 16.415/20), 2026

    Aix-Marseille Université