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Proceedings Paper

Analysis of optical neural stimulation effects on neural networks affected by neurodegenerative diseases
Author(s): M. Zverev; F. Fanjul-Vélez; I. Salas-García; N. Ortega-Quijano; J. L. Arce-Diego
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Paper Abstract

The number of people in risk of developing a neurodegenerative disease increases as the life expectancy grows due to medical advances. Multiple techniques have been developed to improve patient’s condition, from pharmacological to invasive electrodes approaches, but no definite cure has yet been discovered. In this work Optical Neural Stimulation (ONS) has been studied. ONS stimulates noninvasively the outer regions of the brain, mainly the neocortex. The relationship between the stimulation parameters and the therapeutic response is not totally clear. In order to find optimal ONS parameters to treat a particular neurodegenerative disease, mathematical modeling is necessary. Neural networks models have been employed to study the neural spiking activity change induced by ONS. Healthy and pathological neocortical networks have been considered to study the required stimulation to restore the normal activity. The network consisted of a group of interconnected neurons, which were assigned 2D spatial coordinates. The optical stimulation spatial profile was assumed to be Gaussian. The stimulation effects were modeled as synaptic current increases in the affected neurons, proportional to the stimulation fluence. Pathological networks were defined as the healthy ones with some neurons being inactivated, which presented no synaptic conductance. Neurons’ electrical activity was also studied in the frequency domain, focusing specially on the changes of the spectral bands corresponding to brain waves. The complete model could be used to determine the optimal ONS parameters in order to achieve the specific neural spiking patterns or the required local neural activity increase to treat particular neurodegenerative pathologies.

Paper Details

Date Published: 9 March 2016
PDF: 5 pages
Proc. SPIE 9690, Clinical and Translational Neurophotonics; Neural Imaging and Sensing; and Optogenetics and Optical Manipulation, 96901Q (9 March 2016); doi: 10.1117/12.2208683
Show Author Affiliations
M. Zverev, Univ. de Cantabria (Spain)
F. Fanjul-Vélez, Univ. de Cantabria (Spain)
I. Salas-García, Univ. de Cantabria (Spain)
N. Ortega-Quijano, Univ. de Cantabria (Spain)
J. L. Arce-Diego, Univ. de Cantabria (Spain)

Published in SPIE Proceedings Vol. 9690:
Clinical and Translational Neurophotonics; Neural Imaging and Sensing; and Optogenetics and Optical Manipulation
Steen J. Madsen; E. Duco Jansen; Samarendra K. Mohanty; Nitish V. Thakor; Qingming Luo; Victor X. D. Yang, Editor(s)

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