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Proceedings Paper

Bases of a pre-attentional mechanism by means of presynaptic inhibition in the lateral geniculate nucleus
Author(s): Roberto Moreno-Diaz; Alexis Quesada Arengbia; Miguel Aleman-Flores
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Paper Abstract

Presynaptic Inhibition (PI) basically consists of the strong suppression of a neuron's response before the stimulus reaches the synaptic terminals mediated by a second, inhibitory, neuron. It has a long lasting effect, greatly potentiated by the action of anesthetics, that has been observed in motorneurons and in several other places of nervous systems, mainly in sensory processing. In this paper we will focus on several different ways of modeling the effect of Presynaptic Inhibition (PI) in the visual pathway as well as the different artificial counterparts derived from such modelling, mainly in two directions: the possibility of computing invariant representations against general changes in illumination of the input image impinging the retina (which is equivalent to a low-level non linear information processing filter) and the role of PI as selector of sets of stimulae that have to be derived to higher brain areas, which, in turn, is equivalent to a 'higher-level filter' of information, in the sense of 'filtering' the possible semantic content of the information that is allowed to reach later stages of processing.

Paper Details

Date Published: 14 April 2000
PDF: 8 pages
Proc. SPIE 3981, Medical Imaging 2000: Image Perception and Performance, (14 April 2000); doi: 10.1117/12.383122
Show Author Affiliations
Roberto Moreno-Diaz, Univ. de Las Palmas de Gran Canaria (Spain)
Alexis Quesada Arengbia, Univ. de Las Palmas de Gran Canaria (Spain)
Miguel Aleman-Flores, Univ. de Las Palmas de Gran Canaria (Spain)

Published in SPIE Proceedings Vol. 3981:
Medical Imaging 2000: Image Perception and Performance
Elizabeth A. Krupinski, Editor(s)

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