1999
Normal planum temporale asymmetry in dyslexics with a magnocellular pathway deficit
Best M, Demb J. Normal planum temporale asymmetry in dyslexics with a magnocellular pathway deficit. Neuroreport 1999, 10: 607-612. PMID: 10208598, DOI: 10.1097/00001756-199902250-00030.Peer-Reviewed Original ResearchConceptsPlanum temporalePT asymmetryPlanum temporale asymmetrySagittal magnetic resonance imagesMagnocellular visual pathwayMagnocellular deficitVisual pathwayAbnormal symmetryDifferent subtypesPathway deficitsMagnetic resonance imagesSubject groupsMagnocellular pathway deficitDyslexic subjectsResonance imagesDeficitsSubjectsHemispheric symmetryGroupAbnormalitiesSubtypes
1998
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
1997
Brain activity in visual cortex predicts individual differences in reading performance
Demb J, Boynton G, Heeger D. Brain activity in visual cortex predicts individual differences in reading performance. Proceedings Of The National Academy Of Sciences Of The United States Of America 1997, 94: 13363-13366. PMID: 9371851, PMCID: PMC24314, DOI: 10.1073/pnas.94.24.13363.Peer-Reviewed Original ResearchConceptsBrain activityIndividual differencesSpecific visual pathwaysM pathwayCortical visual areasPrimary visual cortexFunctional magnetic resonance imagingMagnetic resonance imagingPathway abnormalitiesVisual cortexVisual pathwayResonance imagingVisual areasMagnocellular pathwayReading abilityPathway inputSignificant correlationReduced activityDyslexicsDyslexiaPathwayStrong relationshipActivityAbnormalitiesCortex