Numerical exploration of the influence of neural noise on the psychometric function at low stimulation intensity levels.

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dc.contributor.authorGomez, C Men_US
dc.date.accessioned2008-12-31en_US
dc.date.accessioned2009-06-01T14:20:50Z
dc.date.available2008-12-31en_US
dc.date.available2009-06-01T14:20:50Z
dc.date.issued2008-12-31en_US
dc.description.abstractThe relationship between stimulus intensity and the probability of detecting the presence of the stimulus is described by the psychometrical function.The probabilistic nature of this relationship is based on the stochastic behaviour of sensory neural channels and sensory networks involved in perceptual processing (Kiang 1968). This study tries to establish a continuum of variability across different levels of integration in the central nervous system. Once the opening and closing times of ionic channels was simulated, a threshold to the collective behaviour of voltage-gated ionic channels was imposed in order to generate the spike train of a single neuron. Afterwards,the trains of spikes of different neurons were added up,simulating the activity of a sensory nerve. By adding the activity due to the stimulus to the spontaneous neural behaviour,the psychometric function was simulated using a thresholding approach.The results can replicate the stochastic resonance phenomenon, but also open up the possibility that attentional phenomena can be mediated not only by increasing neural activity (bursting or oscillatory),but also by increasing noise at the neural level.en_US
dc.description.affiliationDepartment of Experimental Psychology,University of Sevilla, Sevilla 41018, Spain. Cgomez@us.esen_US
dc.identifier.citationGomez CM. Numerical exploration of the influence of neural noise on the psychometric function at low stimulation intensity levels. Journal of Biosciences. 2008 Dec; 33(5): 743-753en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/110764
dc.language.isoengen_US
dc.source.urihttps://www.ias.ac.in/jbiosci/index.htmlen_US
dc.subject.meshComputer Simulationen_US
dc.subject.meshElectrophysiologyen_US
dc.subject.meshHumansen_US
dc.subject.meshIon Channel Gating --physiologyen_US
dc.subject.meshModels, Biologicalen_US
dc.subject.meshNerve Net --physiologyen_US
dc.subject.meshNeurons --physiologyen_US
dc.subject.meshPsychometricsen_US
dc.titleNumerical exploration of the influence of neural noise on the psychometric function at low stimulation intensity levels.en_US
dc.typeJournal Articleen_US
dc.typeResearch Support, Non-U.S. Gov'ten_US
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