Single-cell recordings have indicated that visual stimuli elicit rapid waves of neuronal activation that propagate so fast that they might be free of intracortical feedback. Here, the time course of feedforward activation was traced by measuring pointing responses to color targets preceded by color primes initiating either the same or opposite response. The early time course of priming effects was strictly time locked to prime onset and depended only on properties of the primes, but was independent of the onset times of the actual targets as well as the perceptual effects of targets on primes. Results indicated that nonoverlapping feedforward signals by primes and targets traverse the visuomotor system in a rapid chase, controlling associated motor responses in strict sequence.

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Participants with a potential somatoform disorder did not differ in their familiarity ratings from others. We conclude that these diagnostic terms are probably not commonly used by physicians in routine clinical communication with patients suffering from unexplained medical symptoms. Future empirical research should investigate whether the currently proposed diagnosis complex somatic symptom disorder can solve current problems of acceptability, communication, and adequate treatment.