Knowledge Tree
posterior cortex
Also known as: posterior cerebral cortex
Facts (20)
Sources
Adversarial testing of global neuronal workspace and ... - Nature nature.com Apr 30, 2025 19 facts
claimIntegrated Information Theory (IIT) posits that the network specifying the content of consciousness in the posterior cortex is actively maintained over the duration of the conscious experience.
referenceIntegrated Information Theory (IIT) makes a non-core prediction regarding the posterior cortex that is shared by other theories, such as recurrent processing theory.
claimNo statistically significant orientation information was observed for any category in the posterior cortex.
claimThe experimental results for Integrated Information Theory (IIT) showed a mix of a passed prediction regarding a content-specific complex of neural units in the posterior cortex that persists throughout the percept independent of the task, and a failure regarding the prediction of maximum integrated information.
claimThe lack of sustained synchronization within the posterior cortex challenges Integrated Information Theory (IIT), as it contradicts the theory's claim that the state of the neural network, including its activity and connectivity, specifies the degree and content of consciousness.
claimIn posterior cortex regions of interest, 25 electrodes tracked sustained activity consistent with the predictions of Integrated Information Theory (IIT).
claimOrientation decoding results were consistent across stimulus categories and data modalities in the posterior cortex, but were mostly absent in the prefrontal cortex (PFC).
claimRegarding interareal connectivity during conscious perception, Integrated Information Theory (IIT) predicts sustained short-range connectivity within the posterior cortex, linking low-level sensory areas like V1/V2 with high-level category-selective areas, whereas Global Neuronal Workspace Theory (GNWT) predicts long-range connectivity between high-level category-selective areas and the prefrontal cortex (PFC).
claimIntegrated Information Theory (IIT) posits that the prefrontal cortex (PFC) is not necessary for consciousness, and therefore, decoding conscious content should be most effective from the posterior cortex, with PFC activity providing no improvement in decoding accuracy.
claimIn task-irrelevant conditions, the separability between letters and false fonts in the posterior cortex is significant only for a brief period at the beginning of the stimulus presentation.
claimIntegrated Information Theory (IIT) suggests that a complex of maximum phi resides primarily in the posterior cerebral cortex, specifically in a temporo–parietal–occipital ‘hot zone’.
claimIdentity information is statistically significant for letters and false fonts but not for faces in the posterior cortex.
procedureThe study focused on testing the competing biological implementations of Integrated Information Theory (IIT) and Global Neuronal Workspace Theory (GNWT) by targeting brain regions where their predictions diverge most notably: the posterior cortex for IIT and the prefrontal cortex (PFC) for GNWT.
claimIn posterior cortex regions of interest, cross-temporal representational similarity analysis (RSA) revealed sustained face–object categorical representation, which matched the Integrated Information Theory (IIT) model better than the Global Neuronal Workspace Theory (GNWT) model.
measurementOf the 25 electrodes in posterior cortex regions of interest that tracked stimulus duration, 12 electrodes tracked duration independent of stimulus category primarily in early visual areas, while 13 electrodes showed category-specific duration tracking in the ventral temporal cortex.
claimIn the posterior cortex, Principal Component Analysis (PCA) shows clear separability between letters and false fonts at 0.3 seconds, regardless of whether the task is relevant or irrelevant.
referenceIntegrated Information Theory (IIT) predicts sustained gamma-band connectivity within the posterior cortex, specifically between high-level and low-level sensory areas (V1/V2), throughout any conscious visual experience.
claimAccording to Integrated Information Theory (IIT), the theory would be challenged if sustained content-specific information and activation tracking stimulus duration were absent in the posterior cortex.
claimThe separability between letters and false fonts in the posterior cortex is largely sustained in task-relevant conditions but diminishes between approximately 0.95 and 1.4 seconds.
An adversarial collaboration to critically evaluate theories of ... biorxiv.org Jun 26, 2023 1 fact
claimIntegrated Information Theory (IIT) is challenged by the Cogitate Consortium's finding of a lack of sustained synchronization within the posterior cortex, which contradicts the theory's claim that network connectivity specifies consciousness.