Impaired Consciousness through a Focal Lesion under the left Posteromedial Cortex

Consciousness is made up of arousal (i.e. wakefulness) and awareness (i.e. awareness of the environment and self) (Laurey et al., 1999; Laurey et al., 2004). A series of imaging studies have potently suggested that awareness processing is associated with the posteromedial cortex (PMC, Laurey et al., 1999; Laurey et al., 2004; Cavanna et al., 2006), an area composed of multiple association cortices in the interhemispheric fissure, including the precuneus (BA 7), posterior cingulate area (BA 23), and retrosplenial area (BA 29 and 30) (Cavanna et al., 2006).

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