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Original Article

Oscillations in Motor Priming: Positive Rebound Follows the Inhibitory Phase in the Masked Prime Paradigm

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Pages 484-490 | Published online: 07 Aug 2010
 

Abstract

Masked stimuli can cause partial motor activation and prime responses to subsequent stimuli. Under certain conditions, a biphasic pattern appears, such that positive priming precedes a negative phase, which has been interpreted as evidence of an inhibitory mechanism that suppresses the motor activity caused by the prime. In this article, the authors report evidence for a further reversal in priming: In two experiments, the authors found that the negative compatibility effect was followed by a small but repeatable positive priming effect at an interval of approximately 500 ms between prime and target. Thus, masked primes appear to produce a triphasic pattern of priming, which is consistent with the notion that oscillation between facilitation and inhibition may be a fundamental property of the competitive interactions between response alternatives in the motor system.

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