Time scales and temporal hierarchies in human brain function
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1
Aalto University School of Science and Technology, Brain Research Unit, Low Temperature Laboratory, Finland
I will discuss the curious issue of multiple time scales in human brain function. Our percepts, cognitive processes, motor activity, and social interaction rely on accurate neuronal timing ranging from sub-milliseconds to seconds. Auditory, visual, and tactile inputs reach the primary projection cortex within tens of milliseconds whereas multisensory integration and many other perceptual effects have a wide tolerance or integration window of up to 100-250 ms. Both theoretical considerations and brain imaging data suggest a hierarchically ordered representation of the brain's time scales: the scales are the longer the longer is the distance from the primary sensory area. Importantly, many percepts operate on a mix of both highly precise and quite liberal time scales. Some temporal windows are prolonged in dyslexia. Examples will be given about magnetoencephalographic tracking of cortical activation sequences.
Acknowledgment: Funded by the Academy of Finland.
References
1. Hari R, Parkkonen L and Nangini C: The brain in time: Insights from neuromagnetic recordings. The Year in Cognitive Neuroscience 2010, Annals of the New York Academy of Sciences, in press.
Conference:
NeuroMath COST Action BM0601: Neurodynamic Insight into Functional Connectivity, Cognition, and Consciousness, Dubrovnik, Croatia, 27 Mar - 28 Mar, 2010.
Presentation Type:
Oral Presentation
Topic:
Talks
Citation:
Hari
R
(2010). Time scales and temporal hierarchies in human brain function.
Front. Neurosci.
Conference Abstract:
NeuroMath COST Action BM0601: Neurodynamic Insight into Functional Connectivity, Cognition, and Consciousness.
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Received:
24 Jul 2010;
Published Online:
24 Jul 2010.
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Correspondence:
Riitta Hari, Aalto University School of Science and Technology, Brain Research Unit, Low Temperature Laboratory, Espoo, Finland, hari@neuro.hut.fi