Reduced posterior parietal cortex activation after training on a visual search task
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Otros documentos de la autoría: Bueichekú, Elisenda; Miró-Padilla, Anna; Palomar-García, María-Ángeles; Ventura Campos, Mercedes; Parcet, Maria Antonia; Barrós-Loscertales, Alfonso; Avila, Cesar
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http://dx.doi.org/10.1016/j.neuroimage.2016.04.059 |
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Título
Reduced posterior parietal cortex activation after training on a visual search taskAutoría
Fecha de publicación
2016-07Editor
ElsevierCita bibliográfica
BUEICHEKÚ, Elisenda, et al. Reduced posterior parietal cortex activation after training on a visual search task. NeuroImage, 2016, vol. 135, p. 204-213.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.sciencedirect.com/science/article/pii/S1053811916300994Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Gaining experience on a cognitive task improves behavioral performance and is thought to enhance brain efficiency. Despite the body of literature already published on the effects of training on brain activation, less ... [+]
Gaining experience on a cognitive task improves behavioral performance and is thought to enhance brain efficiency. Despite the body of literature already published on the effects of training on brain activation, less research has been carried out on visual search attention processes under well controlled conditions. Thirty-six healthy adults divided into trained and control groups completed a pre-post letter-based visual search task fMRI study in one day. Twelve letters were used as targets and ten as distractors. The trained group completed a training session (840 trials) with half the targets between scans. The effects of training were studied at the behavioral and brain levels by controlling for repetition effects using both between-subjects (trained vs. control groups) and within-subject (trained vs. untrained targets) controls. The trained participants reduced their response speed by 31% as a result of training, maintaining their accuracy scores, whereas the control group hardly changed. Neural results revealed that brain changes associated with visual search training were circumscribed to reduced activation in the posterior parietal cortex (PPC) when controlling for group, and they included inferior occipital areas when controlling for targets. The observed behavioral and brain changes are discussed in relation to automatic behavior development. The observed training-related decreases could be associated with increased neural efficiency in specific key regions for task performance. [-]
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NeuroImage Volume 135, 15 July 2016Derechos de acceso
© 2016 Elsevier Inc. All rights reserved.
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