Visual evoked potentials during stimulus selection in eyelid conditioning in the rabbit (Oryctolagus cunigulus)

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The eyeblinks of 24 New Zealand white rabbits were conditioned in Exp I to either the visual or the nonvisual element of a compound conditioned stimulus. Evoked potentials (EPs) were simultaneously recorded from the visual cortex. Changes in the late negative component of the EP were related to nonspecific arousal effects. The initial surface positive component, however, was significantly enhanced during visual stimulus control. This enhancement was observed whether the visual stimulus was presented alone or in compound and with either photic or optic chiasma stimulation as the visual stimulus. The effect could not be attributed to arousal, sensitization, or to peripheral mechanisms. Some implications of the data were assessed through a subsequent investigation in Exp II of geniculostriate recovery cycles under the same conditions. (28 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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