Alpha band amplification during illusory jitter perception

Amano, Kaoru, Arnold, Derek H., Takeda, Tsunehiro and Johnston, Alan (2008) Alpha band amplification during illusory jitter perception. Journal of Vision, 8 10: 1-8. doi:10.1167/8.10.3

Author Amano, Kaoru
Arnold, Derek H.
Takeda, Tsunehiro
Johnston, Alan
Title Alpha band amplification during illusory jitter perception
Journal name Journal of Vision   Check publisher's open access policy
ISSN 1534-7362
Publication date 2008-08-01
Year available 2008
Sub-type Article (original research)
DOI 10.1167/8.10.3
Open Access Status DOI
Volume 8
Issue 10
Start page 1
End page 8
Total pages 8
Editor Watson, Dr Andrew B
Place of publication United States
Publisher Association for Research in Vision and Ophthalmology (ARVO)
Language eng
Subject C1
170112 Sensory Processes, Perception and Performance
970117 Expanding Knowledge in Psychology and Cognitive Sciences
Abstract Synchronization is thought to have a role in linking disparate components into neural assemblies. However, the particular frequency of the synchronization is generally considered to be incidental to its functional role. Here we report a link between enhanced alpha activations and an illusory jitter of the same frequency. We measured perceived jitter rates and the magnetoencephalography during presentations of a stimulus wherein red squares and superimposed vertical green bars moved together across a black background. The green bars were either darker, equiluminant with, or brighter than the red squares. We established that the illusory jitter rate, robustly seen only in the equiluminant condition, was ∼10 Hz. Crucially, neural oscillations around 10 Hz were enhanced in this condition. Surprisingly, ∼10 Hz oscillations were also enhanced during illusory jitter perception relative to a moving stimulus that contained physical 10 Hz jitter. This suggests that the enhanced synchronization is associated with illusory jitter generation rather than with jitter perception. Since the stimulus eliciting illusory jitter moves smoothly and rigidly, both the percept and enhanced neural synchrony must be generated within the visual system. Our data therefore indicate a match between the dynamics of synchronous neural activity and the dynamics of a sensory experience offering the intriguing possibility of a common cause.
Keyword MEG
Neural oscillation
Alpha band
Q-Index Code C1
Q-Index Status Confirmed Code
Additional Notes Article # 3

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Created: Fri, 20 Mar 2009, 02:58:39 EST by Lucy O'Brien on behalf of Faculty of Social & Behavioural Sciences