[Duration of trace processes in the neocortex of rabbits].
Changes of pyramidal tract (PT) response after short tetanization, similar to natural stimulation conditions, were analysed in unanaesthetized and nonimmobilized rabbits. PT response recording revealed a long-term (1 h and more) potentiation of monosynaptic neocortical reactions. Predominant better expressed and more preserved increase of synaptic (N) component provides evidence to the conjecture that the basic mechanism of the long-term potentiation consists in the rise of efficiency of excitatory synaptic connections. Less protracted and differently directed changes of D-component permit to consider that excitability change of neurones may be only an additional mechanism of the long-term potentiation. Such features of neocortical long-term potentiation were revealed as its low-frequency depression (at test stimuli repetition) and its spontaneous restoration after depression.
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D000818:Animals; D002540:Cerebral Cortex / Q000502:physiology*; D004558:Electric Stimulation; D004567:Electrodes, Implanted; D005071:Evoked Potentials; D008564:Membrane Potentials; D009119:Muscle Contraction; D011712:Pyramidal Tracts / Q000502:physiology; D011817:Rabbits; D013569:Synapses / Q000502:physiology; D013997:Time Factors; D014851:Wakefulness / Q000502:physiology
K voprosu o dlitel'nosti sledovykh protsessov v novoĭ kore krolikov.