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Updated: Aug 31, 2025

Using Neuron Spiking Activity to Trigger Closed-Loop Stimuli in Neurophysiological Experiments
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The Portiloop: A deep learning-based open science tool for closed-loop brain stimulation.

Nicolas Valenchon1, Yann Bouteiller1, Hugo R Jourde2

  • 1MISTLab-Polytechnique, University of Montreal, Montreal, Quebec, Canada.

Plos One
|August 22, 2022
PubMed
Summary
This summary is machine-generated.

We developed Portiloop, a low-cost, portable system for closed-loop brain stimulation using deep learning. This system precisely targets brain oscillations and achieves performance comparable to expert analysis for sleep spindle detection.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Artificial Intelligence

Background:

  • Closed-loop brain stimulation offers precise interaction with neural processes for neuroscience research and potential clinical applications.
  • Existing systems are often expensive, cumbersome, and lack experimental flexibility, hindering widespread adoption.

Purpose of the Study:

  • To introduce Portiloop, a novel deep learning-based, portable, and low-cost closed-loop brain stimulation system.
  • To enable precise targeting of specific brain oscillations.
  • To provide an open-science platform for advancing closed-loop neuroscience.

Main Methods:

  • Development of open-hardware implementations using commercially available components.
  • Creation of a fast, lightweight neural network model for real-time analysis.
  • Implementation of an exploration algorithm for automatic hyperparameter optimization.
  • Validation using real-time sleep spindle detection.

Main Results:

  • Successful real-time detection of sleep spindles with performance comparable to off-line expert analysis.
  • Demonstration of a portable and low-cost system for closed-loop brain stimulation.
  • Open-source availability of software and hardware plans to foster community development.

Conclusions:

  • Portiloop offers a flexible, accessible, and effective platform for closed-loop brain stimulation research.
  • The system demonstrates the potential for deep learning in advancing real-time neural interfacing.
  • Open science initiatives like Portiloop are crucial for accelerating progress in neuroscience.