Department of Psychology, Reed College, Portland, OR, USA.
Allen Institute for Brain Science, Seattle, WA, USA.
Trends Cogn Sci. 2021 Aug;25(8):660-670. doi: 10.1016/j.tics.2021.05.009. Epub 2021 Jun 23.
Much research on the neural correlates of consciousness (NCC) has focused on two evoked potentials, the P3b and the visual or auditory awareness negativity (VAN, AAN). Surveying a broad range of recent experimental evidence, we find that repeated failures to observe the P3b during conscious perception eliminate it as a putative NCC. Neither the VAN nor the AAN have been dissociated from consciousness; furthermore, a similar neural signal correlates with tactile consciousness. These awareness negativities can be maximal contralateral to the evoking stimulus, are likely generated in underlying sensory cortices, and point to the existence of a generalized perceptual awareness negativity (PAN) reflecting the onset of sensory consciousness.
大量关于意识的神经相关物（NCC）的研究集中在两种诱发电位上，即 P3b 和视觉或听觉意识负波（VAN、AAN）。通过对广泛的最新实验证据进行调查，我们发现，在有意识知觉过程中反复未能观察到 P3b，这使其无法成为潜在的 NCC。VAN 和 AAN 都没有与意识分离；此外，类似的神经信号与触觉意识相关。这些意识负波在刺激的对侧可能达到最大，很可能在潜在的感觉皮层中产生，并指出存在一种普遍的感知意识负波（PAN），反映了感觉意识的开始。
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