Neural correlates of perceptual priming of visual motion.

Full Abstract

In two experiments, the temporal dynamics of neural activity underlying perceptual priming of visual motion was examined using event-related potentials (ERPs) during directional judgments of the apparent motion of two-dimensional sine-wave gratings. Compared to perceptually ambiguous motion, unambiguous left- or rightward motion was associated with enhanced ERP activity about 300 ms after the onset of apparent motion. In the second experiment, ERPs were recorded to two successive motion jumps in which an unambiguous motion jump served as a prime for a subsequent target motion that was ambiguous. The prime-target time interval was varied between 200, 400, and 1000 ms. In a control (motion reversal) condition, the two motion jumps were both unambiguous but in opposite directions. Compared to the motion reversal condition, motion priming was associated with an enhancement of ERP amplitudes at 100 ms and 350 ms following target stimulus onset. ERP enhancement was greatest at a short prime-target interval of 200 ms, which was also associated behaviorally with the strongest priming. The ERP enhancement and behavioral priming were both eliminated at the long 1000 ms prime-target interval. Functional magnetic resonance imaging (fMRI) data from a subset of subjects supported the view that motion priming involves modulation of neural responses both in early visual cortex and in later stages of visual processing.

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Author information

Author/s: Jiang, Yang (Y); Luo, Yue J (YJ); Parasuraman, Raja (R);

Affiliation: Cognitive Science Laboratory, The Catholic University of America, Washington DC, USA. yjiang(-atsign-)codon.nih.gov

Grants: AG 00986 (Agency:NIA NIH HHS) ; AG 07569 (Agency:NIA NIH HHS) ; R01 AG007569-12 (Agency:NIA NIH HHS)

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.

Journal: Brain research bulletin (Brain Res Bull), published in United States. (Language: eng)

Reference: 2002-Jan; vol 57 (issue 2) : pp 211-9

Dates: Created 2002/02/18; Completed 2002/04/11; Revised 2008/11/20;

PMID: 11849828, status: MEDLINE (last retrieval date: 12/26/2008)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult
Brain Mapping
Electroencephalography
Evoked Potentials, Visual - physiology
Humans
Learning - physiology
Magnetic Resonance Imaging
Memory - physiology

Memory - physiology
Motion Perception - physiology
Parietal Lobe - physiology
Recognition (Psychology) - physiology
Temporal Lobe - physiology
Time Factors
Visual Cortex - physiology
Visual Pathways - physiology

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