HapticV1, Main, Exploration, bibRecordById, pubmed:16623847

Tight covariation of BOLD signal changes and slow ERPs in the parietal cortex in a parametric spatial imagery task with haptic acquisition

Identifieur interne : 005D27 ( Main/Exploration ); précédent : 005D26; suivant : 005D28

Tight covariation of BOLD signal changes and slow ERPs in the parietal cortex in a parametric spatial imagery task with haptic acquisition

Auteurs : Tobias Schicke [Allemagne] ; Lars Muckli [Allemagne] ; Anton L. Beer [États-Unis] ; Michael Wibral [Allemagne] ; Wolf Singer [Allemagne] ; Rainer Goebel [Pays-Bas] ; Frank Rösler [Allemagne] ; Brigitte Röder [Allemagne]

Source :

European Journal of Neuroscience [ 0953-816X ] ; 2006-04.

RBID : ISTEX:5E9705143B48FA9F1219953A0483F5EC062D9714

English descriptors

KwdEn :
- Acoustic Stimulation, Brain Mapping, Evoked Potentials, Female, Humans, Imagination, Magnetic Resonance Imaging, Male, Oxygen (blood), Parietal Lobe (blood supply), Parietal Lobe (physiology), Psychomotor Performance, Reaction Time, cortex, event‐related potentials, fMRI, human, mental imagery, source modelling.
MESH :
- chemical , blood : Oxygen.
- blood supply : Parietal Lobe.
- physiology : Parietal Lobe.
- Acoustic Stimulation, Brain Mapping, Evoked Potentials, Female, Humans, Imagination, Magnetic Resonance Imaging, Male, Psychomotor Performance, Reaction Time.

Abstract

The present study investigated the relation of brain activity patterns measured with functional magnetic resonance imaging (fMRI) and slow event‐related potentials (ERPs) associated with a complex cognitive task. A second goal was to examine the neural correlates of spatial imagery of haptically – instead of visually – acquired representations. Using a mental image scanning task, spatial imagery requirements were systematically manipulated by parametrically varying the distance between haptically acquired landmarks. Results showed a close relation between slow ERPs and the blood oxygenation level dependent (BOLD) signal in human parietal lobe. Reaction times of mental scanning correlated with the distances between landmarks on the learned display. In parallel, duration and amplitude of slow ERPs and duration of the haemodynamic response systematically varied as a function of mental scanning distance. Source analysis confirmed that the ERP imagery effect likely originated from the same cortical substrate as the corresponding BOLD effect. This covariation of the BOLD signal with slow ERPs is in line with recent findings in animals demonstrating a tight link between local field potentials and the BOLD signal. The parietal location of the imagery effect is consistent with the idea that externally triggered (perceptual) and mentally driven (imagery) spatial processes are both mediated by the same supramodal brain areas.

Url:

https://api.istex.fr/document/5E9705143B48FA9F1219953A0483F5EC062D9714/fulltext/pdf

DOI: 10.1111/j.1460-9568.2006.04720.x

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">The present study investigated the relation of brain activity patterns measured with functional magnetic resonance imaging (fMRI) and slow event‐related potentials (ERPs) associated with a complex cognitive task. A second goal was to examine the neural correlates of spatial imagery of haptically – instead of visually – acquired representations. Using a mental image scanning task, spatial imagery requirements were systematically manipulated by parametrically varying the distance between haptically acquired landmarks. Results showed a close relation between slow ERPs and the blood oxygenation level dependent (BOLD) signal in human parietal lobe. Reaction times of mental scanning correlated with the distances between landmarks on the learned display. In parallel, duration and amplitude of slow ERPs and duration of the haemodynamic response systematically varied as a function of mental scanning distance. Source analysis confirmed that the ERP imagery effect likely originated from the same cortical substrate as the corresponding BOLD effect. This covariation of the BOLD signal with slow ERPs is in line with recent findings in animals demonstrating a tight link between local field potentials and the BOLD signal. The parietal location of the imagery effect is consistent with the idea that externally triggered (perceptual) and mentally driven (imagery) spatial processes are both mediated by the same supramodal brain areas.</div>
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Tight covariation of BOLD signal changes and slow ERPs in the parietal cortex in a parametric spatial imagery task with haptic acquisition

Tight covariation of BOLD signal changes and slow ERPs in the parietal cortex in a parametric spatial imagery task with haptic acquisition

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Abstract

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