Neural correlates of perceptual consciousness from within: A narrative review of human intracranial research
Despite many years of research, the quest to identify neural correlates of perceptual consciousness (NCC) remains unresolved. One major obstacle lies in methodological limitations: most studies rely on non-invasive neural measures with limited spatial or temporal resolution, making it difficult to disentangle proper NCCs from concurrent cognitive processes. Additionally, the relatively low…
The search for neural correlates of perceptual consciousness (NCC) has faced challenges due to methodological limitations. Most studies utilize non-invasive neural measures with inadequate spatial or temporal resolution, which hinders the distinction between true NCCs and concurrent cognitive activities. Moreover, the limited sensitivity of non-invasive methods results in null findings when investigating proper NCCs.
This review delves into how human intracranial recordings can enhance the pursuit of NCCs by providing high spatiotemporal resolution, increased signal sensitivity, and extensive cortical and subcortical coverage. The examination focuses on studies that have investigated NCCs at the level of individual neurons and populations of neurons, and their implications on the ongoing debates between cognitive and sensory theories of consciousness.
However, current intracranial human recordings display certain limitations, warranting future directions based on emerging technologies and novel experimental paradigms.
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