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National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
Representation of communication sounds in the inferior colliculus of the guinea pig
 Šuta, Daniel ; Kvašňák, Eugen ; Popelář, Jiří ; Syka, Josef
The spectrotemporal discharge patterns of the neuronal population were clearly related to the spectrotemporal acoustic patterns of vocalization sounds.This study provides evidence for encoding of the spoctrotemporal acoustic pattern of vocalization sounds in a spcific and distributed way by the firing patterns of a population of IC units.
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Functional characteristics of neurons in the auditory thalamus
 Kvašňák, Eugen ; Šuta, Daniel ; Popelář, Jiří ; Syka, Josef
The MGB, is similarly as the inferior colliculus (IC) is organized into three subdivisions, with the ventral MGB characterized by the quickest onset reaction with the lowest thresholds to auditory stimulation and with the same ratio of monotonic and non-monotonic RLFs.
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NADPH-d - positive neurons in the auditory cortex of young and very old rats
 Nwabueze-Ogbo, Fidel Chijoke ; Druga, R. ; Syka, Josef
In young and very old animals stained neurons were localized in layers II-VI and in the subcortical white matter. A significantly higher packing density of labeled supragranular layers. In very old animals the thickness of the auditory cortex and the neuronal density was reduced when compared to the young.
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Interaction between descending and ascending pathways in the auditory system
 Syka, Josef
Inactivation of the AC resulted in changes in the latency and amplitude of some parts of click-evoked IC responses and in either an increase or decrease in the firing rate of IC neurons in comparison with normal control conditions. The interaction of ascending and descending pathways in the auditory system may contribute to better frequency tuning, suppression of non-relevant acoustical signals and concentration of our attention on specific signals (for example the voice of the speaker.)
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