A Diversity of Intrinsic Timescales Underlie Neural Computations

Neural processing occurs across a range of temporal scales. To facilitate this, the brain uses fast-changing representations reflecting momentary sensory input alongside more temporally extended representations, which integrate across both short and long temporal windows. The temporal flexibility of...

Celý popis

Uloženo v:

Podrobná bibliografie
Vydáno v:	Frontiers in neural circuits Ročník 14; s. 615626
Hlavní autoři:	Cavanagh, Sean E., Hunt, Laurence T., Kennerley, Steven W.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Switzerland Frontiers Research Foundation 21.12.2020 Frontiers Media S.A
Témata:	Animals autocorrelation Brain - physiology Brain research Cerebral Cortex - physiology Cognitive ability Computational neuroscience Decision making Electrophysiology Humans Information processing Listening Medical imaging Memory, Short-Term - physiology Nerve Net - physiology Neural networks Neural Pathways - physiology Neuroimaging neuronal timescale Neurons Neurons - physiology Neuroscience Short term memory time constant working memory time constant decision-making working memory neuronal timescale autocorrelation
ISSN:	1662-5110, 1662-5110
On-line přístup:	Získat plný text
Tagy:	Přidat tag Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!

Popis
Shrnutí:	Neural processing occurs across a range of temporal scales. To facilitate this, the brain uses fast-changing representations reflecting momentary sensory input alongside more temporally extended representations, which integrate across both short and long temporal windows. The temporal flexibility of these representations allows animals to behave adaptively. Short temporal windows facilitate adaptive responding in dynamic environments, while longer temporal windows promote the gradual integration of information across time. In the cognitive and motor domains, the brain sets overarching goals to be achieved within a long temporal window, which must be broken down into sequences of actions and precise movement control processed across much shorter temporal windows. Previous human neuroimaging studies and large-scale artificial network models have ascribed different processing timescales to different cortical regions, linking this to each region’s position in an anatomical hierarchy determined by patterns of inter-regional connectivity. However, even within cortical regions, there is variability in responses when studied with single-neuron electrophysiology. Here, we review a series of recent electrophysiology experiments that demonstrate the heterogeneity of temporal receptive fields at the level of single neurons within a cortical region. This heterogeneity appears functionally relevant for the computations that neurons perform during decision-making and working memory. We consider anatomical and biophysical mechanisms that may give rise to a heterogeneity of timescales, including recurrent connectivity, cortical layer distribution, and neurotransmitter receptor expression. Finally, we reflect on the computational relevance of each brain region possessing a heterogeneity of neuronal timescales. We argue that this architecture is of particular importance for sensory, motor, and cognitive computations.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 ObjectType-Review-3 content type line 23 These authors have contributed equally to this work Reviewed by: Ken-ichi Amemori, Kyoto University, Japan; Timothy D. Hanks, University of California, Davis, United States Edited by: Emmanuel Procyk, Institut National de la Santé et de la Recherche Médicale (INSERM), France
ISSN:	1662-5110 1662-5110
DOI:	10.3389/fncir.2020.615626