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Photobiomodulation effects on active brain networks during a spatial memory task.

Alba Gutiérrez-Menéndez¹, Sandra Cid-Duarte², María Banqueri³

¹Laboratory of Neuroscience, Department of Psychology, University of Oviedo, Plaza Feijóo, s/n, E-33003, Oviedo, Spain; Instituto de Neurociencias del Principado de Asturias (INEUROPA), Oviedo, Spain.

Physiology & Behavior

|December 18, 2020

Summary

Photobiomodulation (PBM) non-invasively stimulates the brain using light. This study found PBM alters brain metabolism during memory tasks, suggesting its potential for modulating neural network activity.

Keywords:

Brain networks Cytochrome c oxidase Near-infrared light Photobiomodulation Spatial memory

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Area of Science:

Neuroscience
Biomedical Engineering

Background:

Photobiomodulation (PBM) utilizes red to near-infrared light for non-invasive neurostimulation.
PBM shows promise for various pathologies and in healthy individuals.

Purpose of the Study:

To evaluate PBM's effects on rat brain networks in basal and active states.
To compare PBM's impact during a reversal learning task.

Main Methods:

Twenty-eight rats were divided into control and PBM groups, with and without behavioral tasks.
Reversal memory was assessed using the Morris water maze.
Cytochrome c oxidase (CCO) levels measured brain metabolic activity.

Main Results:

Control PBM group showed reduced CCO in multiple brain regions.
Behavioral PBM group exhibited CCO reduction in task-relevant areas (septum, entorhinal, hippocampus, amygdala).
Behavioral PBM group showed increased CCO in the accumbens.

Conclusions:

PBM influences brain metabolic activity in both resting and active states.
Results suggest PBM can modulate active neural networks involved in memory.
Further research is needed to explore PBM's effects on diverse memory tasks and brain networks.