| Autor: |
Simeonova, B. A., Barmintsev, V. A., Luk'yanov, A. S., Gusel'nikov, V. I. |
| Zdroj: |
Neurophysiology; March 1980, Vol. 12 Issue: 2 p134-142, 9p |
| Abstrakt: |
Evoked potentials to electrical stimulation of the spinal cord, its dorsal roots and the superficial orbital branch of the facial nerve were recorded in the tectum opticum of the Black Sea piked dogfishSqualus acanthias L. The distribution of evoked potentials over the surface and in the depth of the tectal lamina and also dependence of the parameters of the responses on the strength and frequency of the stimuli and intervals between them in the case of paired stimulation were studied. Evoked potentials were shown to be tectal in origin, to be recorded mainly contralaterally, and to exhibit specific dynamics of changes in response components under the influence of the various procedures and specific dependence of the responses on the location of the recording point. Significant differences were found between the characteristics of evoked potentials generated in superficial and deep layers of the tectum opticum. The nature and physiological role of nonvisual projections to this structure and also its role in the integrative function of the ichthyopsid brain are discussed. |
| Databáze: |
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