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Science 19 June 1998:
Vol. 280. no. 5371, p. 1809
DOI: 10.1126/science.280.5371.1809n
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Sensory perception has been explained as the transition of stimuli from unconscious detection to above-threshold awareness and has been equated to an increasing proportion of active neurons in higher visual processing areas. Lumer et al. (p. 1930) use functional brain imaging to dissociate changes in perception from changes in stimuli. They find that activity in frontal and parietal brain areas co-vary with the perceptual changes while activity in the visual processing areas also vary with stimulus changes, suggesting that top-down influences mediate perception.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)