Magnocellular and parvocellular pathway influences on location-based inhibition-of-return.
The roles of the parvocellular (P) and magnocellular (M) retino-geniculo-cortical pathways during shifts of visual attention were investigated by creating M/dorsal-biased (eg low spatial frequency target, no objects present) and P/ventral-biased (ie high spatial frequency target, the perception of 3-D objects) stimulus conditions and measuring location-based inhibition-of-return (IOR). P/ventral-biased conditions produced the greatest IOR. M/dorsal-biased conditions produced the least IOR, in one instance eliminating it altogether. The results indicate a close relationship between IOR magnitude and relative P/ventral and M/dorsal activity with location-based IOR related more to P/ventral than to M/dorsal activity.
Department of Psychology, University of Georgia, Athens, GA 30602-3013, USA. jmbrown@uga.edu
James M
JM
Brown
Benjamin A
BA
Guenther
D000704:Analysis of Variance; D001288:Attention / Q000502:physiology*; D003463:Cues; D005403:Fixation, Ocular / Q000502:physiology*; D006801:Humans; D007266:Inhibition, Psychological; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology; D013028:Space Perception / Q000502:physiology; D013334:Students / Q000523:psychology; D014795:Visual Pathways / Q000502:physiology*