Neural correlates of priming on occluded figure interpretation in human fusiform cortex
- PMID: 16753265
- DOI: 10.1016/j.neuroscience.2006.04.062
Neural correlates of priming on occluded figure interpretation in human fusiform cortex
Abstract
The visual system rapidly completes a partially occluded figure. We probed the completion process by using priming in combination with neuroimaging techniques. Priming leads to more efficient visual processing and thus a reduction in neural activity in relevant brain areas. These areas were studied with high spatial resolution and temporal accuracy with focus on early perceptual processing. We recorded magnetoencephalographic responses from 10 human volunteers in a primed same-different task for test figures. The test figures were preceded by a sequence of two figures, a prime or control figure followed by an occluded figure. The prime figures were one of three possible interpretations of the occluded figures: global and local completions and mosaic interpretation. A significant priming effect was evident: in primed trials as compared with control trials, subjects responded faster and the latency was shorter in the magnetoencephalographic signal for the largest peak between 50 and 300 ms after the occluded figure onset. Tomographic and statistical parametric mapping analyses revealed stages of activation in occipitotemporal areas during occluded figure processing. Notably, we found significantly reduced activation in the right fusiform cortex between 120 and 200 ms after occluded figure onset for primed trials as compared with control trials. We also found significant spatiotemporal differences of local, global and mosaic interpretations for individual subjects but not across subjects. We conclude that modulation of activity in the right fusiform cortex may be a neural correlate of priming in the interpretation of an occluded figure, and that this area acts as a hub for different occluded figure interpretations in this early stage of perception.
Similar articles
-
The "mosaic stage" in amodal completion as characterized by magnetoencephalography responses.J Cogn Neurosci. 2006 Aug;18(8):1394-405. doi: 10.1162/jocn.2006.18.8.1394. J Cogn Neurosci. 2006. PMID: 16859423
-
Category-specific organization of prefrontal response-facilitation during priming.Neuropsychologia. 2006;44(10):1765-76. doi: 10.1016/j.neuropsychologia.2006.03.019. Epub 2006 May 15. Neuropsychologia. 2006. PMID: 16701731
-
Spatiotemporal dynamics and connectivity pattern differences between centrally and peripherally presented faces.Neuroimage. 2006 Jul 15;31(4):1726-40. doi: 10.1016/j.neuroimage.2006.02.009. Epub 2006 Mar 24. Neuroimage. 2006. PMID: 16564185 Clinical Trial.
-
The neural correlate of very-long-term picture priming.Eur J Neurosci. 2005 Feb;21(4):1101-6. doi: 10.1111/j.1460-9568.2005.03941.x. Eur J Neurosci. 2005. PMID: 15787715
-
Face inversion disrupts the perception of vertical relations between features in the right human occipito-temporal cortex.J Neuropsychol. 2009 Mar;3(Pt 1):45-67. doi: 10.1348/174866408X292670. J Neuropsychol. 2009. PMID: 19338716
Cited by
-
The neural correlates of visuospatial perceptual and oculomotor extrapolation.PLoS One. 2010 Mar 15;5(3):e9664. doi: 10.1371/journal.pone.0009664. PLoS One. 2010. PMID: 20300627 Free PMC article.
-
Functional specialization and dynamic resource allocation in visual cortex.Hum Brain Mapp. 2010 Jan;31(1):1-13. doi: 10.1002/hbm.20840. Hum Brain Mapp. 2010. PMID: 19621367 Free PMC article.
-
A century of Gestalt psychology in visual perception: II. Conceptual and theoretical foundations.Psychol Bull. 2012 Nov;138(6):1218-52. doi: 10.1037/a0029334. Epub 2012 Jul 30. Psychol Bull. 2012. PMID: 22845750 Free PMC article. Review.
-
Neuroanatomical and cognitive mediators of age-related differences in perceptual priming and learning.Neuropsychology. 2009 Jul;23(4):475-91. doi: 10.1037/a0015377. Neuropsychology. 2009. PMID: 19586211 Free PMC article.
-
Generalization of learning by synchronous waves: from perceptual organization to invariant organization.Cogn Neurodyn. 2011 Jun;5(2):113-32. doi: 10.1007/s11571-010-9142-9. Epub 2010 Dec 10. Cogn Neurodyn. 2011. PMID: 22654985 Free PMC article.
Publication types
MeSH terms
LinkOut - more resources
Full Text Sources
Other Literature Sources