Nikolay G. Bibikov

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We recorded extracellular activity from 402 single units located in the inferior colliculus (IC) of barbiturate-anesthetized albino mice. The stimuli were pure tones at characteristic frequency (CF) with durations of 10, 40 and 100 ms and intensities ranged from 5 to 25 dB above unit's minimum threshold (MT). The tones were presented with different(More)
We tested two hypotheses to determine whether dorsal cochlear nucleus (DCN) neurons are specialized to derive directionality from spectral notches: DCN neurons exhibit greater spectral-dependent directionality than ventral cochlear nucleus (VCN) neurons, and spectral-dependent directionality depends on response minima (nulls) produced by coincidence of best(More)
The ability of 109 single units in the midbrain acoustic centre of frogs (Rana ridibunda, Rana temporaria) to reproduce 10%, 20 Hz sinusoidal amplitude modulation of a long-duration characteristic frequency tone was studied. The sinusoidal modulation was presented either in isolation or summed with a low-frequency (0-50 Hz) noise. Recordings were obtained(More)
  • N G Bibikov
  • 1977
Some neurones in the torus semicircularis of paralyzed lake frogs (Rana ridibunda) exhibited strong response habituation to tonal bursts following with interstimuli intervals of 1 to 5 sec. The habituation became less evident with a devrease of the repetition rate or increase of the stimulus intensity. These units revealed the phenomenon of "postzero"(More)
Using rapid Coldgi technique, studies have been made on the structure of the nervous cells in torus semicircularis of the frog Rana ridibunda. 277 cells observed in frontal and sagittal sections were classified into 3 groups. 198 cells with an oval body had their basal dendrite spreading caudoventrally. The dendritic tree of these cells does not leave torus(More)
A model for firing of the auditory nerve fibres was carried out on a general purpose digital computer. In the model a noise with small correlation time and with assigned standard deviation (when modeling a spontaneous discharge) or a sum of a noise and a determinated signal (when modeling an elicited discharge) is compared with incremental threshold. When(More)
Single neuron responses to sinusoidal 20 Hz amplitude modulated tone bursts (612.5 ms stimulus-on time at the rate of once per 2.2 s) were studied in the auditory midbrain (torus semicircularis) of the immobilized grass frog (Rana temporaria temporaria). The characteristic frequency stimuli at 30 dB above the minimum threshold included 12 full modulation(More)
The goal of these experiments was to evaluate the effect of stimulus evoked input and post spike refractoriness on the shapes of post stimulus time histograms (PSTHs). The time courses of spontaneous and/or evoked activity were studied in 153 neurons located predominantly in the dorsal cochlear nucleus in cats anesthetized with Nembutal. Tone bursts were(More)
The temporal dynamic of firing of single neurons, located in different nuclei of the auditory pathway in the course of sound signals presentation is analyzed. The main features of short-term (<1 s) and long-term (>5 s) adaptation of firing activity in ascending way of an auditory analyzer are compared. In many units during peristimulus adaptation a(More)
Studies have been made of the spontaneous activity and ipsilaterally evoked impulsation in single cells of the medullary auditory region of the frog Rana ridibunda. Approximately 70% of the neurones in the dorsal nucleus exhibited spontaneous firing with an average frequency from 1 to 40 imp/s. Distribution of intervals between impulses (excluding the(More)