HapticV1, Main, Exploration, bibRecord, 002A91

Modality-independent coding of spatial layout in the human brain

Identifieur interne : 002A91 ( Main/Exploration ); précédent : 002A90; suivant : 002A92

Modality-independent coding of spatial layout in the human brain

Auteurs : Thomas Wolbers [Royaume-Uni] ; Roberta L. Klatzky [États-Unis] ; Jack M. Loomis [États-Unis] ; Magdalena G. Wutte [Allemagne] ; Nicholas A. Giudice [États-Unis]

Source :

Current biology : CB [ 0960-9822 ] ; 2011.

RBID : PMC:3119034

English descriptors

KwdEn :
- Adult, Aged, Blindness (physiopathology), Brain Mapping, Cerebral Cortex (physiology), Cues, Feedback, Sensory, Female, Form Perception (physiology), Humans, Magnetic Resonance Imaging, Male, Middle Aged, Photic Stimulation, Space Perception (physiology), Visual Perception (physiology), Visually Impaired Persons (psychology).
MESH :
- physiology : Cerebral Cortex, Form Perception, Space Perception, Visual Perception.
- physiopathology : Blindness.
- psychology : Visually Impaired Persons.
- Adult, Aged, Brain Mapping, Cues, Feedback, Sensory, Female, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Photic Stimulation.

Abstract

Summary

In many non-human species, neural computations of navigational information such as position and orientation are not tied to a specific sensory modality [1, 2]. Rather, spatial signals are integrated from multiple input sources, likely leading to abstract representations of space. In contrast, the potential for abstract spatial representations in humans is not known, as most neuroscientific experiments on human navigation have focused exclusively on visual cues. Here, we tested the modality independence hypothesis with two fMRI experiments that characterized computations in regions implicated in processing spatial layout [3]. According to the hypothesis, such regions should be recruited for spatial computation of 3-D geometric configuration, independent of a specific sensory modality. In support of this view, sighted participants showed strong activation of the parahippocampal place area (PPA) and the retrosplenial cortex (RSC) for visual and haptic exploration of information-matched scenes but not objects. Functional connectivity analyses suggested that these effects were not related to visual recoding, which was further supported by a similar preference for haptic scenes found with blind participants. Taken together, these findings establish the PPA/RSC network as critical in modality-independent spatial computations and provide important evidence for a theory of high-level abstract spatial information processing in the human brain.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3119034

DOI: 10.1016/j.cub.2011.04.038
PubMed: 21620708
PubMed Central: 3119034

Affiliations:

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<front><div type="abstract" xml:lang="en"><title>Summary</title>
<p id="P3">In many non-human species, neural computations of navigational information such as position and orientation are not tied to a specific sensory modality [<xref ref-type="bibr" rid="R1">1</xref>
, <xref ref-type="bibr" rid="R2">2</xref>
]. Rather, spatial signals are integrated from multiple input sources, likely leading to abstract representations of space. In contrast, the potential for abstract spatial representations in humans is not known, as most neuroscientific experiments on human navigation have focused exclusively on visual cues. Here, we tested the modality independence hypothesis with two fMRI experiments that characterized computations in regions implicated in processing spatial layout [<xref ref-type="bibr" rid="R3">3</xref>
]. According to the hypothesis, such regions should be recruited for spatial computation of 3-D geometric configuration, independent of a specific sensory modality. In support of this view, sighted participants showed strong activation of the parahippocampal place area (PPA) and the retrosplenial cortex (RSC) for visual and haptic exploration of information-matched scenes but not objects. Functional connectivity analyses suggested that these effects were not related to visual recoding, which was further supported by a similar preference for haptic scenes found with blind participants. Taken together, these findings establish the PPA/RSC network as critical in modality-independent spatial computations and provide important evidence for a theory of high-level abstract spatial information processing in the human brain.</p>
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Serveur d'exploration sur les dispositifs haptiques

Modality-independent coding of spatial layout in the human brain

Modality-independent coding of spatial layout in the human brain

Source :

English descriptors

Abstract

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