CALT Neurobiology of Reading and Dyslexia 2

Question 1

Neuroimaging research on dyslexia consistently identifies reduced activation in which brain region during reading?

Accepted Answer

The left posterior temporal-parietal region

Answer

fMRI studies consistently show underactivation in left posterior brain regions, particularly the temporoparietal and occipito-temporal areas, during reading in individuals with dyslexia.

Question 2

The phonological deficit hypothesis in dyslexia research refers to:

Accepted Answer

A core weakness in processing the sound structure of spoken language

Answer

The phonological deficit hypothesis proposes that the core neural deficit in dyslexia involves difficulty processing the sound structure of language.

Question 3

Research on brain plasticity and dyslexia intervention has demonstrated that:

Accepted Answer

Effective structured literacy intervention produces measurable neurological changes

Answer

Neuroimaging studies show that effective structured literacy intervention produces measurable increases in activation of the left hemisphere reading circuitry, demonstrating brain plasticity.

Question 4

Magnocellular deficit theory proposes that some individuals with dyslexia have difficulty with:

Accepted Answer

Processing rapid visual and auditory temporal information

Answer

Magnocellular deficit theory suggests that a subset of individuals with dyslexia have weaknesses in visual and auditory processing pathways that handle rapid temporal processing.

Question 5

The heritability of dyslexia suggests that:

Accepted Answer

Genetic factors significantly contribute to the risk of developing dyslexia

Answer

Twin and family studies indicate that dyslexia is highly heritable at approximately 50 to 70 percent, with multiple genetic loci contributing to the risk.

CALT - Certified Academic Language Therapist Practice Test

CALT - Certified Academic Language Therapist Practice Test

CALT Neurobiology of Reading and Dyslexia 2