Abstract
Livingstone et al. presented evidence for a defect of the magnocellular visual processing stream in developmental dyslexia. They reported diminished visual evoked potentials (VEP) to low-contrast, rapid checkerboard reversal patterns in the dyslexics. We attempted to replicate this effect using transient and steady-state VEPs to checkerboard reversal stimuli in a group of adult developmental dyslexics. Several different reversal rates and contrast levels were utilized. No differences were found between the dyslexic and control groups for the low-contrast, rapidly reversing patterns, nor for any combination of stimulus rate or contrast that was tested. Thus, these findings do not support a magnocellular processing deficit in developmental dyslexia.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1123-1127 |
| Number of pages | 5 |
| Journal | Neuropsychologia |
| Volume | 34 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 1996 |
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Keywords
- Developmental dyslexia
- Human
- Magnocellular pathway
- Visual evoked potentials (VEP)
ASJC Scopus subject areas
- Behavioral Neuroscience
- Neuropsychology and Physiological Psychology
Cite this
Developmental dyslexia : Passive visual stimulation provides no evidence for a magnocellular processing defect. / Johannes, Sönke; Kussmaul, Clifton L.; Münte, Thomas F.; Mangun, George R.
In: Neuropsychologia, Vol. 34, No. 11, 11.1996, p. 1123-1127.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Developmental dyslexia
T2 - Passive visual stimulation provides no evidence for a magnocellular processing defect
AU - Johannes, Sönke
AU - Kussmaul, Clifton L.
AU - Münte, Thomas F.
AU - Mangun, George R
PY - 1996/11
Y1 - 1996/11
N2 - Livingstone et al. presented evidence for a defect of the magnocellular visual processing stream in developmental dyslexia. They reported diminished visual evoked potentials (VEP) to low-contrast, rapid checkerboard reversal patterns in the dyslexics. We attempted to replicate this effect using transient and steady-state VEPs to checkerboard reversal stimuli in a group of adult developmental dyslexics. Several different reversal rates and contrast levels were utilized. No differences were found between the dyslexic and control groups for the low-contrast, rapidly reversing patterns, nor for any combination of stimulus rate or contrast that was tested. Thus, these findings do not support a magnocellular processing deficit in developmental dyslexia.
AB - Livingstone et al. presented evidence for a defect of the magnocellular visual processing stream in developmental dyslexia. They reported diminished visual evoked potentials (VEP) to low-contrast, rapid checkerboard reversal patterns in the dyslexics. We attempted to replicate this effect using transient and steady-state VEPs to checkerboard reversal stimuli in a group of adult developmental dyslexics. Several different reversal rates and contrast levels were utilized. No differences were found between the dyslexic and control groups for the low-contrast, rapidly reversing patterns, nor for any combination of stimulus rate or contrast that was tested. Thus, these findings do not support a magnocellular processing deficit in developmental dyslexia.
KW - Developmental dyslexia
KW - Human
KW - Magnocellular pathway
KW - Visual evoked potentials (VEP)
UR - http://www.scopus.com/inward/record.url?scp=0030298548&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030298548&partnerID=8YFLogxK
U2 - 10.1016/0028-3932(96)00026-7
DO - 10.1016/0028-3932(96)00026-7
M3 - Article
C2 - 8904750
AN - SCOPUS:0030298548
VL - 34
SP - 1123
EP - 1127
JO - Neuropsychologia
JF - Neuropsychologia
SN - 0028-3932
IS - 11
ER -