Behavioural Brain Research
February 1, 2022
G. Northoff, Federico Zilio
138 citations
A review of the Temporo-spatial theory of consciousness (TTC) proposes that consciousness arises from the brain's spontaneous activity, not just from external stimuli. The TTC aims to bridge gaps between spontaneous and stimulus-related neural activity and between neuronal and phenomenal features. It introduces four mechanisms—expansion, globalization, alignment, and nestedness—linked to distinct dimensions of consciousness: phenomenal content, access, form/structure, and level/state. The authors conclude the TTC offers a unifying framework for different neuroscientific theories and generates empirically grounded hypotheses about the biological nature of consciousness and its relation to the brain.
Entropy
February 13, 2022
Georg Northoff, Federico Zilio
47 citations
Consciousness operates across multiple timescales, from brief moments to an ongoing 'stream of consciousness'. Integrated Information Theory (IIT) currently places experience at short timescales of 100–300 ms (theta and alpha frequencies), which explains how single inputs become unified phenomenal content. However, this does not address how specific contents relate to one another over time. By integrating IIT with the Temporo-spatial Theory of Consciousness (TTC), which assumes a multitude of timescales, the authors propose that pre-stimulus activity non-additively interacts with input, expanding its temporal features into longer timescales (delta and slower frequencies). This temporo-spatial expansion embeds short-term content within the ongoing stream of consciousness, suggesting that both short and long timescales are needed to account for conscious experience.
Physics of life reviews
March 1, 2025
Georg Northoff, Andrea Buccellato, Federico Zilio
31 citations
The connection between brain activity and mental experience remains poorly understood. The authors extend their earlier hypothesis that shared temporal and spatial dynamics provide a 'common currency' linking neural and mental features. They present additional evidence from thoughts, meditation, depression, and attention showing that temporal characteristics are shared by both brain and mind. New empirical examples demonstrate that spatial characteristics, such as topographic reorganization, are also shared in depression and meditation. The authors specify distinct forms of temporospatial correspondences along a continuum from simple to complex. They propose an integrated mind-brain theory called the Common currency theory (CCT) as a framework for understanding the neuro-mental relationship.
Physics of life reviews
July 1, 2025
Georg Northoff, Federico Zilio, Jianfeng Zhang
The contents of consciousness are shaped primarily through a non-additive pre-post-stimulus interaction that is temporal-dynamic and spatial-topographic in nature. This interaction accounts for the intrinsically subjective nature of conscious experience, which must be distinguished from the more objective modulation by cognitive, sensory, affective, and motor functions. The argument addresses neural features such as alpha power, phase dynamics, trial-to-trial variability, and fractal scale-free dynamics, and relates the approach to other theories like Dendritic Integration Theory, Global Neuronal Workspace Theory, and Integrated Information Theory.
Physics of life reviews
July 1, 2024
Georg Northoff, Federico Zilio, Jianfeng Zhang
Conscious perception depends not only on brain activity after a stimulus appears but also on the brain's ongoing, spontaneous activity before the stimulus. Reviewing recent findings, the authors show that pre-stimulus alpha power (a measure of brain oscillations) influences how vividly or confidently people experience a stimulus, while trial-to-trial variability in alpha activity before and after the stimulus shapes conscious content. The key proposal is that pre- and post-stimulus activity interact in a non-additive, not merely additive, way within the alpha frequency band, and this interaction operates across multiple levels from neurophysiology to phenomenology. This perspective aligns with the Temporo-spatial theory of consciousness, emphasizing that understanding consciousness requires examining brain activity across wider timescales.