Early dissociation of face and object processing: A magnetoencephalographic study

The early dissociation in cortical responses to faces and objects was explored with magnetoencephalographic (MEG) recordings and source localization. To control for differences in the low‐level stimulus features, which are known to modulate early brain responses, we created a novel set of stimuli so...

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Bibliographic Details
Published in:Human brain mapping 2009-03, Vol.30 (3), p.917-927
Main Authors: Susac, Ana, Ilmoniemi, Risto J., Pihko, Elina, Nurminen, Jussi, Supek, Selma
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Brain - physiology
Brain Mapping
face processing
Female
Fundamental and applied biological sciences. Psychology
Human
Humans
Investigative techniques, diagnostic techniques (general aspects)
Learning. Memory
M100
Magnetoencephalography
magnetoencephalography (MEG)
Male
Medical sciences
Memory
Nervous system
nonlinearity
object recognition
occipital cortex
Pattern Recognition, Visual - physiology
Photic Stimulation
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Radiodiagnosis. Nmr imagery. Nmr spectrometry
Statistics as Topic
visual
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Summary:The early dissociation in cortical responses to faces and objects was explored with magnetoencephalographic (MEG) recordings and source localization. To control for differences in the low‐level stimulus features, which are known to modulate early brain responses, we created a novel set of stimuli so that their combinations did not have any differences in the visual‐field location, spatial frequency, or luminance contrast. Differing responses to face and object (flower) stimuli were found at about 100 ms after stimulus onset in the occipital cortex. Our data also confirm that the brain response to a complex visual stimulus is not merely a sum of the responses to its constituent parts; the nonlinearity in the response was largest for meaningful stimuli. Hum Brain Mapp, 2009. © 2008 Wiley‐Liss, Inc.
ISSN:1065-9471
1097-0193
DOI:10.1002/hbm.20557