Functional Magnetic Resonance Imaging of Early Visual Pathways in Dyslexia
Demb J, Boynton G, Heeger D. Functional Magnetic Resonance Imaging of Early Visual Pathways in Dyslexia. Journal Of Neuroscience 1998, 18: 6939-6951. PMID: 9712663, PMCID: PMC6792964, DOI: 10.1523/jneurosci.18-17-06939.1998.Peer-Reviewed Original ResearchConceptsFunctional magnetic resonance imagingMagnetic resonance imagingBrain activityResonance imagingM pathwayReduced brain activityPrimary visual cortexMotion-sensitive areasSpeed discriminationPerceptual thresholdHigher V1Pathway abnormalitiesVisual motion perceptionEarly visual pathwayGroups of dyslexicsVisual cortexVisual pathwayLower perceptual thresholdsExtrastriate areasArea MTMagnocellular pathwayStimulus speedPathway inputEarly visual systemNormal readersPsychophysical evidence for a magnocellular pathway deficit in dyslexia
Demb J, Boynton G, Best M, Heeger D. Psychophysical evidence for a magnocellular pathway deficit in dyslexia. Vision Research 1998, 38: 1555-1559. PMID: 9747491, DOI: 10.1016/s0042-6989(98)00075-3.Peer-Reviewed Original ResearchConceptsSpeed discriminationPsychophysical performanceMagnocellular pathway deficitIndividual differencesPsychophysical evidenceMotion discriminationPsychophysical predictorsDyslexiaDetection taskMagnocellular pathwayPsychophysical thresholdsPathway deficitsContrast sensitivityDeficitsDiscriminationPathway integritySpeed thresholdTaskHypothesisPathway abnormalitiesPredictorsDetection thresholdPerformance