The thalamus interrupts top-down attentional control for permitting exploratory shiftings to sensory signals
| Autor: | Muriel Boucart, Jean-Fran ois Degreef, Olivier Godefroy, George A. Michael |
|---|---|
| Přispěvatelé: | Laboratoire de Neurosciences Fonctionnelles et Pathologies (LNFP), Université de Lille, Droit et Santé-Centre National de la Recherche Scientifique (CNRS), Wartel, Anny |
| Jazyk: | angličtina |
| Rok vydání: | 2001 |
| Předmět: |
Eye Movements
genetic structures Neuropsychological Tests Pulvinar Functional Laterality Thalamic Diseases Orienting response Thalamus MESH: Eye Movements Attention media_common MESH: Thalamus MESH: Middle Aged General Neuroscience MESH: Pulvinar MESH: Neuropsychological Tests Middle Aged Meridian (perimetry visual field) MESH: Photic Stimulation MESH: Thalamic Diseases Visual Perception [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC] MESH: Exploratory Behavior Psychology Vigilance (psychology) Adult Brain Infarction media_common.quotation_subject MESH: Orientation Sensory system MESH: Psychomotor Performance Perceptual Disorders MESH: Brain Infarction Salience (neuroscience) Orientation Reaction Time Humans [SDV.NEU] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC] MESH: Functional Laterality MESH: Perceptual Disorders MESH: Attention MESH: Humans MESH: Visual Perception Attentional control Motor control MESH: Adult MESH: Reaction Time Exploratory Behavior Neuroscience Photic Stimulation Psychomotor Performance |
| Zdroj: | NeuroReport NeuroReport, Lippincott, Williams & Wilkins, 2001, 12 (9), pp.2041-8 |
| ISSN: | 0959-4965 |
| Popis: | International audience; When attention is involuntarily drawn in a direction different to that of the target, slower motor response times are observed (i.e. the meridian effect). Previous data suggested that the thalamus might participate in the generation of visual salience. What may be the role of the thalamus in the capture by luminance transients when attentional control is in action? A single experiment was administrated in a group of ten healthy volunteers as well as in a group of three patients with unilateral thalamic infarcts. Subjects participated in a task where attentional control was interrupted by a distractor. The meridian effect was present only in the performance of the healthy volunteers and when distractors occurred in the ipsilesional (intact) hemifield of the thalamic patients. These results suggest that when an important signal appears during attentional focalization, the thalamus interrupts current focalization and permits the compilation of an attentional program in the midbrain aiming at generating an orienting response towards the source of this signal. |
| Databáze: | OpenAIRE |
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