Measuring time to awareness

The timing of two simultaneous responses to one single visual event, namely the sudden subjective expansion of a real object occurring at the onset of a reaching movement, was measured in normal subjects. The motor response was represented by the earliest sign of correction in trajectory of the move...

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Bibliographic Details
Published inNeuroreport Vol. 2; no. 12; p. 797
Main Authors Castiello, U, Jeannerod, M
Format Journal Article
LanguageEnglish
Published England 01.12.1991
Subjects
Awareness - physiology
Humans
Movement
Psychomotor Performance - physiology
Reaction Time
Visual Perception
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Summary:The timing of two simultaneous responses to one single visual event, namely the sudden subjective expansion of a real object occurring at the onset of a reaching movement, was measured in normal subjects. The motor response was represented by the earliest sign of correction in trajectory of the movement. The subjective report was represented by a vocal utterance that the subjects were instructed to emit when they became aware of the change in appearance of the object. The subjective report lagged the motor response by 150 ms. Control experiments ruled out a possible interference between the two responses. It is concluded that this temporal dissociation reflects a duality of neural pathways involved in processing object-related information.
ISSN:0959-4965
DOI:10.1097/00001756-199112000-00017