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Dynamic premotor-to-parietal interactions during spatial imagery.

The neurobiological processes underlying mental imagery are a matter of debate and controversy among neuroscientists, cognitive psychologists, philosophers, and biologists. Recent neuroimaging studies demonstrated that the execution of mental imagery activates large frontoparietal and occipitotempor... Full description

Journal Title: The Journal of neuroscience : the official journal of the Society for Neuroscience August 20, 2008, Vol.28(34), pp.8417-8429
Main Author: Sack, Alexander T
Other Authors: Jacobs, Christianne , De Martino, Federico , Staeren, Noel , Goebel, Rainer , Formisano, Elia
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1529-2401 ; DOI: 10.1523/JNEUROSCI.2656-08.2008
Link: http://search.proquest.com/docview/69450689/?pq-origsite=primo
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title: Dynamic premotor-to-parietal interactions during spatial imagery.
format: Article
creator:
  • Sack, Alexander T
  • Jacobs, Christianne
  • De Martino, Federico
  • Staeren, Noel
  • Goebel, Rainer
  • Formisano, Elia
subjects:
  • Adult–Physiology
  • Cognition–Physiology
  • Female–Physiology
  • Humans–Physiology
  • Imagination–Physiology
  • Magnetic Resonance Imaging–Physiology
  • Male–Physiology
  • Mental Processes–Physiology
  • Motor Cortex–Physiology
  • Nerve Net–Physiology
  • Parietal Lobe–Physiology
  • Reaction Time–Physiology
  • Synaptic Transmission–Physiology
ispartof: The Journal of neuroscience : the official journal of the Society for Neuroscience, August 20, 2008, Vol.28(34), pp.8417-8429
description: The neurobiological processes underlying mental imagery are a matter of debate and controversy among neuroscientists, cognitive psychologists, philosophers, and biologists. Recent neuroimaging studies demonstrated that the execution of mental imagery activates large frontoparietal and occipitotemporal networks in the human brain. These previous imaging studies, however, neglected the crucial interplay within and across the widely distributed cortical networks of activated brain regions. Here, we combined time-resolved event-related functional magnetic resonance imaging with analyses of interactions between brain regions (functional and effective brain connectivity) to unravel the premotor-parietal dynamics underlying spatial imagery. Participants had to sequentially construct and spatially transform a mental visual object based on either verbal or visual instructions. By concurrently accounting for the full spatiotemporal pattern of brain activity and network connectivity, we functionally segregated an early from a late premotor-parietal imagery network. Moreover, we revealed that the modality-specific information upcoming from sensory brain regions is first sent to the premotor cortex and then to the medial-dorsal parietal cortex, i.e., top-down from the motor to the perceptual pole during spatial imagery. Importantly, we demonstrate that the premotor cortex serves as the central relay station, projecting to parietal cortex at two functionally distinct stages during spatial imagery. Our approach enabled us to disentangle the multicomponential cognitive construct of mental imagery into its different cognitive subelements. We discuss and explicitly assign these mental subprocesses to each of the revealed effective brain connectivity networks and present an integrative neurobiological model of spatial imagery.
language: eng
source:
identifier: E-ISSN: 1529-2401 ; DOI: 10.1523/JNEUROSCI.2656-08.2008
fulltext: fulltext
issn:
  • 15292401
  • 1529-2401
url: Link


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subjectAdult–Physiology ; Cognition–Physiology ; Female–Physiology ; Humans–Physiology ; Imagination–Physiology ; Magnetic Resonance Imaging–Physiology ; Male–Physiology ; Mental Processes–Physiology ; Motor Cortex–Physiology ; Nerve Net–Physiology ; Parietal Lobe–Physiology ; Reaction Time–Physiology ; Synaptic Transmission–Physiology
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descriptionThe neurobiological processes underlying mental imagery are a matter of debate and controversy among neuroscientists, cognitive psychologists, philosophers, and biologists. Recent neuroimaging studies demonstrated that the execution of mental imagery activates large frontoparietal and occipitotemporal networks in the human brain. These previous imaging studies, however, neglected the crucial interplay within and across the widely distributed cortical networks of activated brain regions. Here, we combined time-resolved event-related functional magnetic resonance imaging with analyses of interactions between brain regions (functional and effective brain connectivity) to unravel the premotor-parietal dynamics underlying spatial imagery. Participants had to sequentially construct and spatially transform a mental visual object based on either verbal or visual instructions. By concurrently accounting for the full spatiotemporal pattern of brain activity and network connectivity, we functionally segregated an early from a late premotor-parietal imagery network. Moreover, we revealed that the modality-specific information upcoming from sensory brain regions is first sent to the premotor cortex and then to the medial-dorsal parietal cortex, i.e., top-down from the motor to the perceptual pole during spatial imagery. Importantly, we demonstrate that the premotor cortex serves as the central relay station, projecting to parietal cortex at two functionally distinct stages during spatial imagery. Our approach enabled us to disentangle the multicomponential cognitive construct of mental imagery into its different cognitive subelements. We discuss and explicitly assign these mental subprocesses to each of the revealed effective brain connectivity networks and present an integrative neurobiological model of spatial imagery.
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