Cerebral Cortex Advance Access originally published online on January 25, 2006
Cerebral Cortex 2007 17(1):63-70; doi:10.1093/cercor/bhj124
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Rapid Face-Selective Adaptation of an Early Extrastriate Component in MEG
Harvard University, Cambridge, MA, USA
Address correspondence to Dr Alison Harris, Vision Sciences Laboratory, Department of Psychology, Harvard University, Cambridge, MA 02138, USA. Email: aharris{at}alum.mit.edu.
Adaptation paradigms are becoming increasingly popular for characterizing visual areas in neuroimaging, but the relation of these results to perception is unclear. Neurophysiological studies have generally reported effects of stimulus repetition starting at 250–300 ms after stimulus onset, well beyond the latencies of components associated with perception (100–200 ms). Here we demonstrate adaptation for earlier evoked components when 2 stimuli (S1 and S2) are presented in close succession. Using magnetoencephalography, we examined the M170, a "face-selective" response at 170 ms after stimulus onset that shows a larger response to faces than to other stimuli. Adaptation of the M170 occurred only when stimuli were presented with relatively short stimulus onset asynchronies (<800 ms) and was larger for faces preceded by faces than by houses. This face-selective adaptation is not merely low-level habituation to physical stimulus attributes, as photographic, line-drawing, and 2-tone face images produced similar levels of adaptation. Nor does it depend on the amplitude of the S1 response: adaptation remained greater for faces than houses even when the amplitude of the S1 face response was reduced by visual noise. These results indicate that rapid adaptation of early, short-latency responses not only exists but also can be category selective.
Key Words: face perception • magnetoencephalography • M170 • object recognition • repetition effects
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  W. Sato, T. Kochiyama, S. Uono, and S. Yoshikawa Time course of superior temporal sulcus activity in response to eye gaze: a combined fMRI and MEG study Soc Cogn Affect Neurosci, September 1, 2008; 3(3): 224 - 232. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 E. Lemche, A. Anilkumar, V. P. Giampietro, M. J. Brammer, S. A. Surguladze, N. S. Lawrence, D. Gasston, X. Chitnis, S. C. R. Williams, M. Sierra, et al. Cerebral and autonomic responses to emotional facial expressions in depersonalisation disorder The British Journal of Psychiatry, September 1, 2008; 193(3): 222 - 228. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. Harris and K. Nakayama Rapid Adaptation of the M170 Response: Importance of Face Parts Cereb Cortex, February 1, 2008; 18(2): 467 - 476. [Abstract] [Full Text] [PDF]
|
|