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  • Title: [The reflection of the operations of comparing afferent flow with internal pretuning in the neuronal impulse activity of the frontal cortex in the dog].
    Author: Pirogov AA, Erofeev AI, Kozlov AP.
    Journal: Zh Vyssh Nerv Deiat Im I P Pavlova; 1990; 40(2):331-9. PubMed ID: 2166395.
    Abstract:
    From 192 neurons, recorded in the frontal cortex of dogs trained for differential classical conditioning of salivary reflex, 24 cells were identified related to the detection of matching-mismatching conditioned and unconditioned stimuli (CS and US) to internal set. Impulse reactions of the 1-st group of neurones (11 cells) to US disappeared, when any deviation from standard pattern of CS-US pairing occurred or when US characteristics were suddenly changed. These reactions developed again at the 3-5th repeated presentation of the stimuli delivered in "new" regime. Neurones of the 2-nd group (13 cells) were activated in response to CS only when two sequential CSs had different meaning. The 1-st group of neurones is considered as detectors of matching, and the 2-nd group--as detectors of mismatching the stimulus to its neural model, formed by mechanism of reinforcement.
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