Un abstract que nos pasan por PsyArt:
Preserved Self-Awareness following
Extensive Bilateral Brain Damage to the Insula, Anterior Cingulate, and
Medial Prefrontal Cortices.
Philippi CL, Feinstein JS, Khalsa SS, Damasio A, Tranel D, Landini G, Williford K, Rudrauf D.
Division of Behavioral Neurology
and Cognitive Neuroscience, Department of Neurology, University of
Iowa, Iowa City, Iowa, United States of America.
Source: PLoS One. 2012;7(8):e38413. Epub 2012 Aug 22.
It has been proposed that
self-awareness (SA), a multifaceted phenomenon central to human
consciousness, depends critically on specific brain regions, namely the
insular cortex, the anterior cingulate cortex (ACC), and the medial
prefrontal cortex (mPFC). Such a proposal predicts that damage to these
regions should disrupt or even abolish SA. We tested this prediction in
a rare neurological patient with extensive bilateral brain damage
encompassing the insula, ACC, mPFC, and the medial temporal lobes. In
spite of severe amnesia, which partially affected his "autobiographical
self", the patient's SA remained fundamentally intact. His Core SA,
including basic self-recognition and sense of self-agency, was
preserved. His Extended SA and Introspective SA were also largely
intact, as he has a stable self-concept and intact higher-order
metacognitive abilities. The results suggest that the insular cortex,
ACC and mPFC are not required for most aspects of SA. Our findings are
compatible with the hypothesis that SA is likely to emerge from more
distributed interactions among brain networks including those in the
brainstem, thalamus, and posteromedial cortices.