Title: Influence of Unspecific Impulses on the Responses of Sensory Cortex
Abstract: Many studies have been undertaken to investigate the role of nonspecific impulses in the elaboration of cortical-evoked reactions. Experiments were performed on cats, with two kinds of preparations according to two experimental procedures. When the influence of thalamic nonspecific nuclei was studied, the experiments were performed on cats under light nembutal or chloralose anesthesia. When the influence of reticular formation was investigated, curarized and encéphale isolé preparations were used. In these experiments, responses of the visual system were used as a test reaction. The reticular formation was activated either by direct electrical stimulation, using bipolar electrodes inserted stereotaxically at collicular level, or by the stimulation of the skin of a forelimb. During nonspecific thalamic stimulation at frequencies of 8–12/s, a marked facilitation of primary responses was observed in favorable cases and when the preparation was in good functional state. The cortical responses evoked by different stimulation intensities applied to the thalamic relay nucleus are also elaborated in the chapter.
Publication Year: 1963
Publication Date: 1963-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 14
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