Neural Mechanisms of Visual Attention: How Top-Down Feedback Highlights Relevant Locations

by: Yuri B Saalmann, Ivan N Pigarev, Trichur R Vidyasagar

Science, Vol. 316, No. 5831. (15 June 2007), pp. 1612-1615.

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Abstract

Attention helps us process potentially important objects by selectively increasing the activity of sensory neurons that represent the relevant locations and features of our environment. This selection process requires top-down feedback about what is important in our environment. We investigated how parietal cortical output influences neural activity in early sensory areas. Neural recordings were made simultaneously from the posterior parietal cortex and an earlier area in the visual pathway, the medial temporal area, of macaques performing a visual matching task. When the monkey selectively attended to a location, the timing of activities in the two regions became synchronized, with the parietal cortex leading the medial temporal area. Parietal neurons may thus selectively increase activity in earlier sensory areas to enable focused spatial attention. 10.1126/science.1139140

@article{citeulike:1391621, abstract = {Attention helps us process potentially important objects by selectively increasing the activity of sensory neurons that represent the relevant locations and features of our environment. This selection process requires top-down feedback about what is important in our environment. We investigated how parietal cortical output influences neural activity in early sensory areas. Neural recordings were made simultaneously from the posterior parietal cortex and an earlier area in the visual pathway, the medial temporal area, of macaques performing a visual matching task. When the monkey selectively attended to a location, the timing of activities in the two regions became synchronized, with the parietal cortex leading the medial temporal area. Parietal neurons may thus selectively increase activity in earlier sensory areas to enable focused spatial attention. 10.1126/science.1139140}, author = {Saalmann, Yuri B. and Pigarev, Ivan N. and Vidyasagar, Trichur R. }, citeulike-article-id = {1391621}, doi = {http://dx.doi.org/10.1126/science.1139140}, journal = {Science}, keywords = {attention, coherence, lfp, mt, parietal\_cortex, simultanous\_recording}, month = {June}, number = {5831}, pages = {1612--1615}, posted-at = {2007-06-27 21:14:36}, priority = {3}, title = {Neural Mechanisms of Visual Attention: How Top-Down Feedback Highlights Relevant Locations}, url = {http://dx.doi.org/10.1126/science.1139140}, volume = {316}, year = {2007} }

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TY - JOUR ID - citeulike:1391621 L3 - citeulike-article-id:1391621 TI - Neural Mechanisms of Visual Attention: How Top-Down Feedback Highlights Relevant Locations JF - Science VL - 316 IS - 5831 SP - 1612 EP - 1615 N2 - Attention helps us process potentially important objects by selectively increasing the activity of sensory neurons that represent the relevant locations and features of our environment. This selection process requires top-down feedback about what is important in our environment. We investigated how parietal cortical output influences neural activity in early sensory areas. Neural recordings were made simultaneously from the posterior parietal cortex and an earlier area in the visual pathway, the medial temporal area, of macaques performing a visual matching task. When the monkey selectively attended to a location, the timing of activities in the two regions became synchronized, with the parietal cortex leading the medial temporal area. Parietal neurons may thus selectively increase activity in earlier sensory areas to enable focused spatial attention. 10.1126/science.1139140 KW - attention KW - coherence KW - lfp KW - mt KW - parietal_cortex KW - simultanous_recording AU - Saalmann, Yuri AU - Pigarev, Ivan AU - Vidyasagar, Trichur PY - 2007/06/15/ UR - http://dx.doi.org/10.1126/science.1139140 ER -

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