From sensory processes to conscious perception

Feinstein, Justin S.; Stein, Murray B.; Castillo, Gabriel; Paulus, Martin P.

doi:10.1016/j.concog.2003.10.004

Cited by 50 publications

(55 citation statements)

References 47 publications

(85 reference statements)

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“…Unlike other midline regions, the cACC seems to be crucially involved in linking self and consciousness in DOC. This is in accordance with the double role of the ACC in both self and consciousness, as observed in healthy and lesion subjects [Devinsky et al, 1995;Feinstein et al, 2004;Luo et al, 2009;Paus, 2001]. Our findings complement these observations by showing that the altered neural activity in the cACC during self-relatedness may be crucial in determining the degree of consciousness in vegetative patients.…”

Section: Discussionsupporting

confidence: 91%

Anterior cingulate activity and the self in disorders of consciousness

Qin¹,

Di²,

Liu³

et al. 2010

Human Brain Mapping

112

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Section: Discussionsupporting

confidence: 91%

Anterior cingulate activity and the self in disorders of consciousness

Qin¹,

Di²,

Liu³

et al. 2010

Human Brain Mapping

112

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show abstract

“…In the same vein, the present results extend those of several field studies. First, fMRI has shown that a stimulus interference paradigm induced the failure of primary visual consciousness together with a depression of the activation in anterior cingulate, medial prefrontal and frontopolar regions [Feinstein et al, 2004], while a visual-somatosensory perceptual illusion was strictly related to the activation of premotor cortex [Ehrsson et al, 2004[Ehrsson et al, , 2005. Second, EEG studies have reported that frontal-parietal P300 was higher in amplitude after subliminal rare than frequent stimuli of oddball paradigms; it was also higher after seen (conscious perception) than not seen (subliminal perception) rare stimuli [Brazdil et al, 1998[Brazdil et al, , 2001Shevrin, 2001].…”

Section: Primary Consciousness During Visual Executive Processesmentioning

confidence: 99%

Cortical sources of visual evoked potentials during consciousness of executive processes

Babiloni

Vecchio

Iacoboni

et al. 2008

Human Brain Mapping

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What is the timing of cortical activation related to consciousness of visuo-spatial executive functions? Electroencephalographic data (128 channels) were recorded in 13 adults. Cue stimulus briefly appeared on right or left (equal probability) monitor side for a period, inducing about 50% of recognitions. It was then masked and followed (2 s) by a central visual go stimulus. Left (right) mouse button had to be clicked after right (left) cue stimulus. This "inverted" response indexed executive processes. Afterward, subjects said "seen" if they had detected the cue stimulus or "not seen" when it was missed. Sources of event-related potentials (ERPs) were estimated by LORETA software. The inverted responses were about 95% in seen trials and about 60% in not seen trials. Cue stimulus evoked frontal-parietooccipital potentials, having the same peak latencies in the seen and not seen data. Maximal difference in amplitude of the seen and not seen ERPs was detected at about +300-ms post-stimulus (P3). P3 sources were higher in amplitude in the seen than not seen trials in dorsolateral prefrontal, premotor and parietooccipital areas. This was true in dorsolateral prefrontal and premotor cortex even when percentage of the inverted responses and reaction time were paired in the seen and not seen trials. These results suggest that, in normal subjects, the primary consciousness enhances the efficacy of visuo-spatial executive processes and is sub-served by a late (100- to 400-ms post-stimulus) enhancement of the neural synchronization in frontal areas.

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“…A study using fMRI found that activity in the anterior cingulate, medial prefrontal cortex and frontopolar cortex was linked to the conscious perception of targets during the attentional blink [23]. del Cul et al [17] reported activations in frontal, parietal and temporal cortex as a neural correlate of consciousness, with the prefrontal cortex being a necessary component [19], while participants performed the number categorization task.…”

Section: (C) Dichotomous or All-or-none Awarenessmentioning

confidence: 99%

The graded and dichotomous nature of visual awareness

Windey

Vermeiren

Atas

et al. 2014

Phil. Trans. R. Soc. B

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Is our visual experience of the world graded or dichotomous? Opposite pre-theoretical intuitions apply in different cases. For instance, when looking at a scene, one has a distinct sense that our experience has a graded character: one cannot say that there is no experience of contents that fall outside the focus of attention, but one cannot say that there is full awareness of such contents either. By contrast, when performing a visual detection task, our sense of having perceived the stimulus or not exhibits a more dichotomous character. Such issues have recently been the object of intense debate because different theoretical frameworks make different predictions about the graded versus dichotomous character of consciousness. Here, we review both relevant empirical findings as well as the associated theories (i.e. local recurrent processing versus global neural workspace theory). Next, we attempt to reconcile such contradictory theories by suggesting that level of processing is an often-ignored but highly relevant dimension through which we can cast a novel look at existing empirical findings. Thus, using a range of different stimuli, tasks and subjective scales, we show that processing low-level, non-semantic content results in graded visual experience, whereas processing high-level semantic content is experienced in a more dichotomous manner. We close by comparing our perspective with existing proposals, focusing in particular on the partial awareness hypothesis.

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From sensory processes to conscious perception

Cited by 50 publications

References 47 publications

Anterior cingulate activity and the self in disorders of consciousness

Anterior cingulate activity and the self in disorders of consciousness

Cortical sources of visual evoked potentials during consciousness of executive processes

The graded and dichotomous nature of visual awareness

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