Title:
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Spectral characteristics of phase sensitivity and discharge rate of neurons in the ascending tectofugal visual system
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Author:
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Wypych, Marek; Nagy, Attila; Mochol, Gabriela; Foik, Andrzej; Benedek, György; Waleszczyk, Wioletta J.
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Abstract:
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Drifting gratings can modulate the activity of visual neurons at the temporal frequency of the stimulus. In order to
characterize the temporal frequency modulation in the cat’s ascending tectofugal visual system, we recorded the activity of
single neurons in the superior colliculus, the suprageniculate nucleus, and the anterior ectosylvian cortex during visual
stimulation with drifting sine-wave gratings. In response to such stimuli, neurons in each structure showed an increase in
firing rate and/or oscillatory modulated firing at the temporal frequency of the stimulus (phase sensitivity). To obtain a more
complete characterization of the neural responses in spatiotemporal frequency domain, we analyzed the mean firing rate
and the strength of the oscillatory modulations measured by the standardized Fourier component of the response at the
temporal frequency of the stimulus. We show that the spatiotemporal stimulus parameters that elicit maximal oscillations
often differ from those that elicit a maximal discharge rate. Furthermore, the temporal modulation and discharge-rate
spectral receptive fields often do not overlap, suggesting that the detection range for visual stimuli provided jointly by
modulated and unmodulated response components is larger than the range provided by a one response component. |
Abstract:
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This work was supported by Hungarian Brain Research Program KTIA 13 NAP-A-I/15 grant, OTKA Hungary Grant K83810, Polish National Science Centre
Grant N N303 820640, Polish-Hungarian bilateral academic grants for years (2011-2016) and EU FP7 Project, GA No 264173 (Bio-Imagine). The funders had no role
in study design, data collection and analysis, decision to publish, or preparation of the manuscript. |
Subject(s):
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-Animals -Cats -Female -Male -Neurons -Photic stimulation -Visual Cortex -Visual pathways |
Rights:
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© 2014 Wypych et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
https://creativecommons.org/licenses/by/4.0/
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Document type:
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Article Article - Published version |
Published by:
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Public Library of Science (PLoS)
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