Prism adaptation in the healthy brain: The shift in line bisection judgments is long lasting and fluctuates
| Autor: | Karen T. Reilly, Laure Pisella, Selene Schintu, Romeo Salemme, Stéphane Jacobs, Alessandro Farnè |
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| Přispěvatelé: | Centre de recherche en neurosciences de Lyon (CRNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Espace et Action, Université de Lyon-Université de Lyon-IFR19-Institut National de la Santé et de la Recherche Médicale (INSERM), Université de Lyon |
| Rok vydání: | 2014 |
| Předmět: |
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medicine.medical_specialty Time Factors genetic structures Cognitive Neuroscience media_common.quotation_subject Experimental and Cognitive Psychology Adaptation (eye) Audiology Functional Laterality Developmental psychology Neglect Judgment Young Adult Behavioral Neuroscience Perception Adaptation Psychological Psychophysics medicine Humans Contrast (vision) ComputingMilieux_MISCELLANEOUS media_common [SCCO.NEUR]Cognitive science/Neuroscience Cognition Spatial cognition Adaptation Physiological Duration (music) Space Perception Visual Perception Female Psychology Prism adaptation Photic Stimulation |
| Zdroj: | Neuropsychologia Neuropsychologia, Elsevier, 2014, 53, pp.165-170. ⟨10.1016/j.neuropsychologia.2013.11.013⟩ |
| ISSN: | 0028-3932 1873-3514 |
| Popis: | Rightward prism adaptation has been shown to ameliorate visuospatial biases in right brain-damaged patients with neglect, and a single session of prism adaptation can lead to improvements that last up to several hours. Leftward prism adaptation in neurologically healthy individuals induces neglect-like biases in visuospatial tasks. The duration of these effects in healthy individuals, typically assumed to be ephemeral, has never been investigated. Here we assessed the time-course of the adaptation-induced modifications in a classical perceptual line bisection task that was repeatedly administered for approximately 40 min after a single session of adaptation to either a leftward or rightward prismatic deviation. Consistent with previous reports, only adaptation to leftward-deviating prisms induced a visuospatial shift on perceptual line bisection judgments. The typical pattern of pseudoneglect was counteracted by a rightward shift in midline judgments, which became significant between 5 and 10 min after adaptation, fluctuated between being significant or not several times in the 40 min following adaptation, and was present as late as 35 min. In contrast, the sensorimotor aftereffect was present immediately after adaptation to both rightward and leftward deviating prisms, decayed initially then remained stable until 40 min. These results demonstrate that both the sensorimotor and visuospatial effects last for at least 35 min, but that the visuospatial shift needs time to fully develop and fluctuates. By showing that the effects of prism adaptation in the undamaged brain are not ephemeral, these findings reveal the presence of another, so-far neglected dimension in the domain of the cognitive effects induced by prism adaptation, namely time. The prolonged duration of the induced visuospatial shift, previously considered to be a feature of prism adaptation unique to brain-damaged subjects, also applies to the normal brain. |
| Databáze: | OpenAIRE |
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