Neural correlates of temporality: default mode variability and temporal awareness.
Consciousness and Cognition June 2012 DOI: 10.1016/j.concog.2011.02.016 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Secondary analysis of fMRI data Peer reviewed |
|---|---|
| Sample size | 25 |
| Population | Healthy subjects from the Grady et al. (2005) study across the adult lifespan |
| Key points | Support vector machine "brain reading" of default mode fMRI data detected information specifying elapsed time, and further analysis identified distributed networks encoding implicit time. These networks fluctuate rather than being continuously active, but the aggregate regions of greatest variability closely resemble the default mode network, which the author proposes acts as a state-dependent monitor of temporality. |
Abstract
The continual background awareness of duration is an essential structure of consciousness, conferring temporal extension to the many objects of awareness within the evanescent sensory present. Seeking the possible neural correlates of ubiquitous temporal awareness, this article reexamines fMRI data from off-task "default mode" (DM) periods in 25 healthy subjects studied by Grady et al. ("Age-related Changes in Brain Activity across the Adult Lifespan,"Journal of Cognitive Neuroscience 18(2), 2005). "Brain reading" using support vector machines detected information specifying elapsed time, and further analysis specified distributed networks encoding implicit time. These networks fluctuate; none are continuously active during DM. However, the aggregate regions of greatest variability closely resemble the default mode network. It appears that the default mode network has an important role as a state-dependent monitor of temporality.
Citations in the library
Cited by 14
- Moments in Time Frontiers in Integrative Neuroscience 2011
- Abnormal Time Experiences in Major Depression: An Empirical Qualitative Study Psychopathology December 15, 2016
- First few seconds for flow: A comprehensive proposal of the neurobiology and neurodynamics of state onset. Neuroscience & Biobehavioral Reviews December 1, 2022
- Duration Perception Versus Perception Duration: A Proposed Model for the Consciously Experienced Moment Timing & Time Perception August 30, 2018
- Systema Temporis: A time-based dimensional framework for consciousness and cognition. Consciousness and Cognition August 1, 2019
and 9 more in the library
Cites 4
- A default mode of brain function Proceedings of the National Academy of Sciences January 16, 2001
- Functional MRI and the study of human consciousness. Journal of Cognitive Neuroscience August 15, 2002
- Explanatory Correlates of Consciousness: Theoretical and Computational Challenges Cognitive Computation January 25, 2009
- Mathematizing phenomenology Phenomenology and the Cognitive Sciences July 1, 2007