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What is the cerebellar theory?
The cerebellar theory of dyslexia asserts that the cause of dyslexia is an abnormality in the cerebellum (a region in the back of the brain), which in turn cause disruption in normal development, which causes issues with motor control, balance, working memory, attention, automatization, and ultimately, reading.
What are the main theories of dyslexia?
Four major theories of developmental dyslexia are discussed: the phonological deficit theory, the double-deficit theory, the magnocellular theory, and the cerebellar theory.
Who developed the theory of dyslexia?
Rudolf Berlin: Originator of the term dyslexia. Annals of Dyslexia, 23(1), 57–63.
What is magnocellular theory of dyslexia?
The magnocellular system responds to rapid changes in visual stimulation such as those caused by moving stimuli. The magnocellular deficit theory of dyslexia postulates that dyslexia is the result of reduced sensitivity in the magnocellular system.
What are the current theories about the causes of dyslexia?
The major theories of developmental dyslexia
- The phonological theory.
- The rapid auditory processing theory.
- The visual theory.
- The cerebellar theory.
- The magnocellular theory.
- Screening for other disorders.
- Automatic picture naming.
- Automatic digit naming.
What is the origin of dyslexia?
Rudolf Berlin used the term dyslexia to describe partial reading loss in an adult patient. The word is drawn from the Greek prefix δυσ- (dus-), “hard, bad, difficult” + λέξις (lexis), “speech, word”.
What is magnocellular visual system?
the part of the visual system that projects to or originates from large neurons in the two most ventral layers (the magnocellular layers) of the lateral geniculate nucleus. It allows the rapid perception of movement, form, and changes in brightness but is relatively insensitive to stimulus location and color.
What is the magnocellular pathway?
The magnocellular pathway is one of the three primary subcortical pathways (magnocellular, parvocellular, and koniocellular pathways) leading from the retina to visual cortex via the lateral geniculate nucleus (LGN).