Atypical speech lateralization in adults with developmental coordination disorder demonstrated using functional transcranial Doppler ultrasound

Autor: Jessica C. Hodgson, John M. Hudson
Rok vydání: 2016
Předmět:
Adult
Male
cerebral lateralisation
Speech production
Adolescent
Ultrasonography
Doppler
Transcranial
speech production
Cognitive Neuroscience
developmental coordination disorder
Neuropsychological Tests
Cognitive neuroscience
Specific language impairment
Functional Laterality
050105 experimental psychology
Lateralization of brain function
Young Adult
03 medical and health sciences
Behavioral Neuroscience
0302 clinical medicine
Phonetics
motor control
medicine
Humans
0501 psychology and cognitive sciences
Motor skill
Language
Language Tests
05 social sciences
Dyslexia
Motor control
Cognition
Original Articles
Middle Aged
medicine.disease
Motor Skills Disorders
Neuropsychology and Physiological Psychology
Motor Skills
Cerebrovascular Circulation
functional transcranial Doppler ultrasound
Female
Original Article
Psychology
030217 neurology & neurosurgery
Cognitive psychology
Zdroj: Journal of Neuropsychology
ISSN: 1748-6645
Popis: Research using clinical populations to explore the relationship between hemispheric speech lateralization and handedness has focused on individuals with speech and language disorders, such as dyslexia or specific language impairment (SLI). Such work reveals atypical patterns of cerebral lateralization and handedness in these groups compared to controls. There are few studies that examine this relationship in people with motor coordination impairments but without speech or reading deficits, which is a surprising omission given the prevalence of theories suggesting a common neural network underlying both functions. We use an emerging imaging technique in cognitive neuroscience; functional transcranial Doppler (fTCD) ultrasound, to assess whether individuals with developmental coordination disorder (DCD) display reduced left‐hemisphere lateralization for speech production compared to control participants. Twelve adult control participants and 12 adults with DCD, but no other developmental/cognitive impairments, performed a word‐generation task whilst undergoing fTCD imaging to establish a hemispheric lateralization index for speech production. All participants also completed an electronic peg‐moving task to determine hand skill. As predicted, the DCD group showed a significantly reduced left lateralization pattern for the speech production task compared to controls. Performance on the motor skill task showed a clear preference for the dominant hand across both groups; however, the DCD group mean movement times were significantly higher for the non‐dominant hand. This is the first study of its kind to assess hand skill and speech lateralization in DCD. The results reveal a reduced leftwards asymmetry for speech and a slower motor performance. This fits alongside previous work showing atypical cerebral lateralization in DCD for other cognitive processes (e.g., executive function and short‐term memory) and thus speaks to debates on theories of the links between motor control and language production.
Databáze: OpenAIRE
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