کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4347902 1615176 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Boosting up gamma-band oscillations leaves target-stimulus in masking out of awareness: Explaining an apparent paradox
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Boosting up gamma-band oscillations leaves target-stimulus in masking out of awareness: Explaining an apparent paradox
چکیده انگلیسی

Boost up gamma-band neuronal oscillations have been interpreted as a correlate of pertinent stimulus awareness. The validity of this observation-based conclusion can be rigorously tested if the basic methodological rule of investigating neural correlates of consciousness (NCC) is followed: the varying contents of consciousness should be contrasted with invariant stimulation. We asked whether reliable gamma-band oscillations recorded from primary visual cortex appear as signatures of target awareness in metacontrast masking with invariant stimulation parameters. Surprisingly, clear target-stimuli awareness was associated with less expressed gamma power. However, because when target awareness was effectively masked more gamma power of the EEG response was found, and because this gamma-boost emerged at the post-target time when mask information was presented, we were able to explain our results as target substitution in consciousness by mask representation due to enhanced mask processing.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 450, Issue 3, 6 February 2009, Pages 351–355
نویسندگان
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