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O A Khachidze

Publications and source records attributed to O A Khachidze.

5 recordsLinked to original sources
PubMed1979

Intramodal and interaural interactions of the human slow auditory evoked potential.

It is proved that the human slow auditory evoked potential (SAEP) possess intramodal (frequency) and interaural specific properties. It is shown that tonotopic and bilateral organization of the SAEP generating system is better expressed at lower stimulus intensities. It is concluded that neuron populations of the SAEP generating system which perceive less different tone stimuli overlap each other greater than those which perceive more different stimuli. The data on intramodal and interaural specificity of SAEP are discussed from the point of view of its extralemniscal origin.

Acoustic Stimulation↗
PubMed1977

[Intramodal and interaural specificity of the human slow auditory evoked potential].

Parameters of slow auditory evoked potentials (SAEPs) evoked by monotonal monaural stimuli were compared with those evoked by a series of tone stimuli of different frequencies. In one version of polytonal stimulation the side of sound application was alternately varied. In the case of polytonal stimulation the amplitude of SAEPs was consistently greater than that in the case of monotonal stimulation. The maximal amplitudes were obtained during alternating polytonal stimulation. In the case of polytonal stimulation, together with the amplitude increase, a regular decrease in its variability was noticed. SAEPs recorded during polytonal stimulation were also characterized by greater peak-latency values. It is concluded that SAEPs possess intramodal and interaural specific properties. It is proved that the tonotopic and bilaterally symmetric organization of SAEP generating system is better manifested at lower sound intensities. The data demonstrate that neuron populations of the SAEP generating system which perceive slightly different sound stimuli overlap each other more than those which perceive more different sounds. The data on intramodal and interaural specificity of SAEP are discussed from the point of view of extralemniscal origin of this potential.

Adult↗
PubMedDate not supplied

[The relationship between the parameters of the early and late oscillations of human cortical evoked potentials and the rhythm of acoustic stimulation].

The amplitudes of all deflections of the slow auditory evoked potential (AEP) regularly decrease in alert subjects with the increase of stimulation rate. As compared with the late deflections (P2N2), the decrease of the amplitude of comparatively early deflections (N1P2) is more pronounced. It is a rather logarithmic, than a linear function of the interstimulus interval. The degree of amplitude diminution of slow AEPs due to a greater stimulation rate depends on the intensity of acoustic stimul: at greater sound intensities the decrease is more pronounced. The higher rates of stimulation produce, along with a decreased amplitude, a shorter peak latencies of all slow AEP deflections (except the peak of deflection P1). In narcotic (chloralhydrate) sleep higher rates of stimulation are not attended with any regular changes in the amplitude and peak latencies of the slow AEP.

Acoustic Stimulation↗