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Modelling the eye movements of dyslexic children during reading as a continuous time random walk.
Chaos
August 2023
Instituto de Física del Sur, Departamento de Física, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca 8000, Argentina.
The study of eye movements during reading is considered a valuable tool for understanding the underlying cognitive processes and for its ability to detect alterations that could be associated with neurocognitive deficiencies or visual conditions. During reading, the gaze moves from one position to the next on the text performing a saccade-fixation sequence. This dynamics resembles processes usually described as continuous time random walk, where the jumps are the saccadic movements and waiting times are the duration of fixations.
View Article and Find Full Text PDFDifferential diagnosis of vergence and saccade disorders in dyslexia.
Sci Rep
December 2020
IRIS Lab, Neurophysiology of Binocular Motor Control and Vision, CNRS FRE2022 Neurosciences, UFR Biomedical, University of Paris, 45 rue des Saints Pères, 75006, Paris, France.
Previous studies suggest vergence and saccade abnormalities in dyslexic adolescents. However, these studies are mainly clinically based and do not provide objective measurements of eye movements, but rather subjectively evaluate vergence using haplosopic conditions in which the two eyes are dissociated (via polarizers, prisms, or intermittent spectacles). Other studies have identified deficits with binocular coordination during reading in dyslexics.
View Article and Find Full Text PDFA 9-year neuropsychological report of a patient with LGI1-associated limbic encephalitis.
J Clin Exp Neuropsychol
September 2019
d Neurology Unit, Department of Neuro-Motor Diseases , Azienda Unità Sanitaria Locale - IRCCS Reggio Emilia , Reggio Emilia , Italy.
: Anti-leucine-rich glioma-inactivated 1 limbic encephalitis (LGI1-LE) is an autoimmune disorder associated with antibodies to voltage-gated potassium channels (VGKC). It is a non-paraneoplastic and partially reversible encephalitis that can be diagnosed via serological testing. Untreated LGI1-LE can be associated with neurocognitive as well as neuropsychiatric sequelae.
View Article and Find Full Text PDFSpontaneous Resolution of Cerebral Pial Arteriovenous Fistula After Angiography: Report of Two Cases.
World Neurosurg
July 2017
Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Background: Cerebral pial arteriovenous fistula (AVF) is a rare disorder, and its natural course is uncertain. The present article reports 2 rare cases of pial AVF that underwent spontaneous cure after diagnostic cerebral angiogram.
Case Descriptions: A 73-year-old man presented with generalized seizure and reported severe but intermittent headache in the right temporo-occipital area.
Linguistic and perceptual-motor contributions to the kinematic properties of the braille reading finger.
Hum Mov Sci
August 2011
Department of Psychology, Research Centre for Cognitive Neuroscience, University of Auckland, Private Bag 92019, Auckland, New Zealand.
Recordings of the dominant finger during the reading of braille sentences by experienced readers reveal that the velocity of the finger changes frequently during the traverse of a line of text. These changes, not previously reported, involve a multitude of accelerations and decelerations, as well as reversals of direction. We investigated the origin of these velocity intermittencies (as well as movement reversals) by asking readers to twice read out-loud or silently sentences comprising high- or low-frequency words which combined to make grammatical sentences that were either meaningful or nonmeaningful.
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