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  • Title: [Dendritic action potentials of pyramidal neurons of the sensomotor cortex of the cerebral cortex of the cat].
    Author: Labakhua TSh, Kokaia MG, Okudzhava VM.
    Journal: Neirofiziologiia; 1986; 18(4):435-43. PubMed ID: 3020451.
    Abstract:
    The intracellular activity of pyramidal tract neurons during electrical stimulation of ventro-lateral and ventro-postero-lateral nuclei of thalamus was studied in acute experiments on cats immobilized by myorelaxants. Both somatic and presumably dendritic spikes (d-spikes) were observed. The latter were characterized by relatively low and variable (5-60 mV) amplitude; d-spikes occurred both spontaneously and in response to single shock and tetanic (8-14/s) stimulation of the thalamus. They were also induced by intracellular depolarizing current pulses and thalamic stimulation following iontophoretic application of strychnine. Simultaneously generated somatic and d-spikes revealed no collision between each other. Intracellular hyperpolarizing current pulses abolished only somatic spikes, while d-spikes were not affected. Dendritic origin with multiple generation zones of these variable spikes is suggested. Possible functional role of d-spike is discussed.
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