7 Matching Annotations
  1. Oct 2023
    1. .

      Some experiments which involve conscious perception of external stimuli with reports/tasks have shown activation of prefrontal areas, but this activation may have been related to the reports/tasks rather than the conscious experiences (not indicative of content-specific NCC). Other experiments which involve conscious perception of external stimuli without reports/tasks showed more posterior activation than anterior activation (indicative of content-specific NCC).

    2. .

      Within-state paradigms comparing conscious individuals to unconscious or minimally conscious individuals have revealed posterior area activity to show the most difference between consciousness and unconsciousness or minimal consciousness (there is a "posterior hot zone" which may be indicative of the NCC).

    3. However, neuroimaging experiments can sample brain activ-ity systematically and noninvasively in healthy volunteers (Pol-drack and Farah, 2015) and, with appropriate methodologies,they can also provide valuable information about the functionalspecificity of brain regions (Moran and Zaki, 2013; Poldrack andFarah, 2015).
    4. .

      Compared with case studies (lesions) and electrical stimulation studies, neuroimaging studies are less accurate in determining the exact brain regions that contribute to consciousness. Neuroimaging often covers multiple brain areas, some of which may not be directly involved in modulating content-specific NCC.

  2. Aug 2022
  3. Jun 2021
  4. Mar 2017