Intersensorial summation as a nonlinear contribution to cerebral excitation

Authors:
Isabel Gonzalo;Miguel A. Porras
Affiliations:
Departamento de Optica, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Madrid, Spain;Departamento de Física Aplicada, ETSIM, Universidad Politécnica de Madrid, Madrid, Spain
Venue:
IWANN'03 Proceedings of the Artificial and natural neural networks 7th international conference on Computational methods in neural modeling - Volume 1
Year:
2003

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Abstract

Visual deficits have been discovered in sufferers of Parkinson's disease [1] and the cause of this is not clearly understood. This paper reports on a digital neuromodel that investigates a hypothesis that the deficit may be due to a projection from the Basal Ganglia to the Superior Colliculus where a shortage of Dopamine introduces noise in the oculo-motor loop. New experiments were done with Parkinson's patients to track the deficit and the neuromodel predicts performance against oculo-motor noise. It is seen that a group Parkinson's sufferers in whom the deficit is pronounced follow the predicted law, while controls with poor performance do not follow the law. This helps to uphold the noise hypothesis.