concept

precuneus

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Self-awareness, self-regulation, and self-transcendence (S-ART) frontiersin.org Frontiers in Human Neuroscience 9 facts

claimManna et al. (2010) found meditation-specific increases in the precuneus, bilateral inferior frontal gyrus (IFG), and right parahippocampal gyrus during open monitoring (OM) meditation compared to a rest condition.

claimImagined self-action relative to imagined experimenter action strongly activates the inferior parietal lobule (IPL), including the temporoparietal junction (TPJ), the somatosensory cortex, and the precuneus.

claimBrain areas involved in mentalizing include the temporoparietal junction (TPJ), temporal pole (TP), anterior insular cortex (AIC), precuneus, and dorsomedial prefrontal cortex (DMPFC).

claimAnterior insular cortex (AIC) activation is inversely correlated with posteromedial cortex (PMC) activation, including the precuneus, posterior cingulate cortex (PCC), and retrosplenial cortex (RSP), during tasks related to awareness and attention.

claimThe precuneus is characterized by transient decreases in tonic activity during engagement in non-self (NS) processing or during default mode forms of rest, as reported by Cavanna and Trimble (2006).

referenceCavanna and Trimble (2006) reviewed the functional anatomy and behavioral correlates of the precuneus.

claimThe precuneus is involved in contexts involving a first-person perspective (FPP), visuo-spatial imagery, execution and preparation of motor behavior, episodic memory retrieval, and agency, as noted by Cavanna and Trimble (2006).

measurementThe precuneus and surrounding posterior medial cortex (PMC) display the highest resting metabolic rates in the brain, consuming 35% more glucose than any other brain area, which suggests they play a tonic role in self-processing.

claimThe precuneus is activated during Focused Attention (FA) meditation compared to rest, and during Open Monitoring (OM) meditation compared to rest, suggesting it plays a key role in self-induced transitions between meditative and discursive rest states, according to Manna et al. (2010).

The Mechanisms of Psychedelic Visionary Experiences - Frontiers frontiersin.org Frontiers Sep 27, 2017 5 facts

referenceThe Default Mode Network is functionally and anatomically connected with the thalamus and precuneus, a connectivity that is crucial to consciousness, according to Cunningham et al. (2017).

measurementCarhart-Harris et al. (2012) reported that psilocybin causes a decrease in posterior cingulate cortex (PCC) activity and reduced connectivity in the default mode network (DMN) and precuneus.

claimEpileptic seizures, including complex partial, generalized tonic-clonic, and absence seizures, impair primary nodes of the Default Mode Network (DMN), specifically the precuneus/PCC, medial frontal cortex, lateral parietal cortex, and the anterior cingulate cortex (ACC), resulting in long-lasting decreases in DMN activity.

referenceThe major subdivisions of the Default Mode Network include the ventral medial and dorsal medial regions of the prefrontal cortex, the posterior cingulate cortex (PCC) with the precuneus, and the lateral parietal cortex.

referencePalhano-Fontes et al. (2015) found that ayahuasca consumption causes a significant decrease in activity throughout most parts of the Default Mode Network, particularly in the posterior cingulate cortex, precuneus, and medial prefrontal cortex, while also reducing functional connectivity within the posterior cingulate cortex/precuneus.

A Synergistic Workspace for Human Consciousness Revealed by ... elifesciences.org eLife 3 facts

claimRegions showing consistent decreases in ΦR during loss of consciousness were primarily members of the global synergistic workspace, specifically the default mode network (bilateral precuneus and medial prefrontal cortex) and bilateral inferior parietal cortex, with involvement of left temporal cortices.

claimReductions of ΦR in the medial prefrontal cortex and posterior cingulate/precuneus are reliably observed across different analytic approaches, confirming the robustness of these specific findings.

claimThe default mode network (DMN) comprises the posterior cingulate, precuneus, medial prefrontal cortex, and inferior parietal cortices.

Global workspace theory - Wikipedia en.wikipedia.org Wikipedia 1 fact

claimBrain regions including the prefrontal cortex, anterior temporal lobe, inferior parietal lobe, and the precuneus integrate information over space and time by sending and receiving projections to and from a broad variety of distant brain regions.

Ancient Roots of Today's Emerging Renaissance in ... link.springer.com Springer 1 fact

claimClassic psychedelics initiate a cascade of altered neural connectivity and blood-flow across brain regions including the default-mode network (medial prefrontal cortex, posterior cingulate cortex, inferior parietal lobule, lateral temporal cortex, hippocampus, and precuneus), the amygdala, the thalamus, and the claustrum.

GWT: A Leading Consciousness Theory Depends on Information ... mindmatters.ai Mind Matters Oct 15, 2021 1 fact

referenceMorten L. Kringelbach and Gustavo Deco identify the global workspace as a core subset of brain regions including the precuneus, the posterior and isthmus cingulate, nucleus accumbens, putamen, hippocampus, and amygdala.