| Autor: |
Silakov, V. L., Khananashvili, M. M., Moroz, B. T., Pityk, N. I., Perkhurova, V. D. |
| Zdroj: |
Neuroscience and Behavioral Physiology; March 1980, Vol. 10 Issue: 2 p99-105, 7p |
| Abstrakt: |
Conclusions 1.Somatic and interoceptive afferent stimuli evoked complex reorganization of spontaneous and evoked activity of visual cortical neurons. The unit responses most frequently observed consist of long diffuse changes in firing rate. In 40–45% of cells phasic responses were observed, with relatively stable inhibitory pauses and periods of activation. The development of phasic responses could begin either with a period of activation or with initial inhibition of activity.2.Together with unconditioned-reflex processes, the dynamics of sensory integration in the visual cortex is determined by conditioned-reflex mechanisms of both intra- and intersensory character. The basis of function of a microsystem of learning cells in the visual cortex is formed by neurons capable of fixing conditioned changes in evoked activity, which constitute 18.6% of the total number of cells in the visual projection cortex that responded to direct cortical stimulation.3.Cholinergic and serotoninergic structures with complex organization, whose activity is differentiated in relation to the cortical cells participating in unconditioned- and conditioned-reflex interaction between excitation of different modalities, are to be found in the visual cortex. |
| Databáze: |
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