The role of motion direction selective extrastriate regions in reading: a transcranial magnetic stimulation study

Why reading ability is correlated with motion processing ability is perplexing. Activity in motion direction processing regions (Area V5/MT+) was perturbed by means of repetitive transcranial magnetic stimulation (rTMS) to examine its effect on reading. A functional probe (significant shortening of...

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Bibliographic Details
Published in:Brain and language 2003-04, Vol.85 (1), p.140-155
Main Authors: Liederman, Jacqueline, McGraw Fisher, Janet, Schulz, Marcela, Maxwell, Carolyn, Théoret, Hugo, Pascual-Leone, Alvaro
Format: Article
Language:English
Subjects:
Adult
Anatomical correlates of behavior
Behavioral psychophysiology
Biological and medical sciences
Corpus Striatum - physiology
Dyslexia
Female
Fundamental and applied biological sciences. Psychology
Humans
Male
Motion Perception
Phonological processing
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Reading
TMS
Transcranial Magnetic Stimulation - instrumentation
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Summary:Why reading ability is correlated with motion processing ability is perplexing. Activity in motion direction processing regions (Area V5/MT+) was perturbed by means of repetitive transcranial magnetic stimulation (rTMS) to examine its effect on reading. A functional probe (significant shortening of the motion aftereffect) was used to identify Area V5/MT+. Right-handed participants (8 m, 8 f) received three 7.5 min blocks of rTMS, after which two phonological and one orthographic reading tasks were administered. Application of rTMS to Area V5/MT+ (as compared to a non-rTMS baseline) significantly decreased performance only during non-word naming. The pattern of naming errors and the absence of deficits on the second phonological task were not consistent with a role for Area V5/MT+ in phonological decoding. Instead, its role in reading may be limited to image stabilization and/or letter localization.
ISSN:0093-934X
1090-2155
DOI:10.1016/S0093-934X(02)00550-3