P3b, consciousness, and complex unconscious processing
How can perceptual consciousness be indexed in humans? Recent work with ERPs suggests that P3b, a relatively late component, may be a neural correlate of consciousness (NCC). This proposal dovetails with currently prevailing cognitive theory regarding the nature of conscious versus unconscious proce...
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| Veröffentlicht in: | Cortex 2015-12, Vol.73, p.216-227 |
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| container_title | Cortex |
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| creator | Silverstein, Brian H. Snodgrass, Michael Shevrin, Howard Kushwaha, Ramesh |
| description | How can perceptual consciousness be indexed in humans? Recent work with ERPs suggests that P3b, a relatively late component, may be a neural correlate of consciousness (NCC). This proposal dovetails with currently prevailing cognitive theory regarding the nature of conscious versus unconscious processes, which holds that the latter are simple and very brief, whereas consciousness is ostensibly required for more durable, complex cognitive processing. Using a P3b oddball paradigm, we instead show that P3b and even later, related slow wave activity occur under rigorously subliminal conditions. Additional principal component analysis (PCA) further differentiated the presence of both P3a and P3b components, demonstrating that the latter indeed occurred subliminally. Collectively, our results suggest that complex, sustained cognitive processing can occur unconsciously and that P3b is not an NCC after all. |
| doi_str_mv | 10.1016/j.cortex.2015.09.004 |
| format | Article |
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| ispartof | Cortex, 2015-12, Vol.73, p.216-227 |
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| language | eng |
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| source | MEDLINE; Elsevier ScienceDirect Journals |
| subjects | Adolescent Adult Brain - physiology Brain - physiopathology Consciousness Consciousness - physiology Event-Related Potentials, P300 - physiology Evoked Potentials - physiology Female Humans Male Mental Processes - physiology Middle Aged Oddball P3b Subliminal Unconsciousness - diagnosis Unconsciousness - physiopathology Young Adult |
| title | P3b, consciousness, and complex unconscious processing |
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