Frontoparietal Network Connectivity During an N-Back Task in Adults With Autism Spectrum Disorder
Autor: | Veronica Yuk, Charline Urbain, Evdokia Anagnostou, Margot J. Taylor |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
medicine.medical_specialty
alpha lcsh:RC435-571 Precuneus Alpha (ethology) autism Audiology behavioral disciplines and activities working memory maintenance 03 medical and health sciences 0302 clinical medicine lcsh:Psychiatry medicine Set (psychology) Original Research n-back Psychiatry MEG Working memory Inferior parietal lobule medicine.disease 030227 psychiatry Psychiatry and Mental health medicine.anatomical_structure Autism spectrum disorder theta connectivity Autism recognition Psychology 030217 neurology & neurosurgery Psychiatrie |
Zdroj: | Frontiers in Psychiatry, Vol 11 (2020) Frontiers in psychiatry, 11 Frontiers in Psychiatry |
ISSN: | 1664-0640 |
Popis: | Background: Short-term and working memory (STM and WM) deficits have been demonstrated in individuals with autism spectrum disorder (ASD) and may emerge through atypical functional activity and connectivity of the frontoparietal network, which exerts top-down control necessary for successful STM and WM processes. Little is known regarding the spectral properties of the frontoparietal network during STM or WM processes in ASD, although certain neural frequencies have been linked to specific neural mechanisms. Methods: We analysed magnetoencephalographic data from 39 control adults (26 males; 27.15 ± 5.91 years old) and 40 adults with ASD (26 males; 27.17 ± 6.27 years old) during a 1-back condition (STM) of an n-back task, and from a subset of this sample during a 2-back condition (WM). We performed seed-based connectivity analyses using regions of the frontoparietal network. Interregional synchrony in theta, alpha, and beta bands was assessed with the phase difference derivative and compared between groups during periods of maintenance and recognition. Results: During maintenance of newly presented vs. repeated stimuli, the two groups did not differ significantly in theta, alpha, or beta phase synchrony for either condition. Adults with ASD showed alpha-band synchrony in a network containing the right dorsolateral prefrontal cortex, bilateral inferior parietal lobules (IPL), and precuneus in both 1- and 2-back tasks, whereas controls demonstrated alpha-band synchrony in a sparser set of regions, including the left insula and IPL, in only the 1-back task. During recognition of repeated vs. newly presented stimuli, adults with ASD exhibited decreased theta-band connectivity compared to controls in a network with hubs in the right inferior frontal gyrus and left IPL in the 1-back condition. Whilst there were no group differences in connectivity in the 2-back condition, adults with ASD showed no frontoparietal network recruitment during recognition, whilst controls activated networks in the theta and beta bands. Conclusions: Our findings suggest that since adults with ASD performed well on the n-back task, their appropriate, but effortful recruitment of alpha-band mechanisms in the frontoparietal network to maintain items in STM and WM may compensate for atypical modulation of this network in the theta band to recognise previously presented items in STM. SCOPUS: ar.j info:eu-repo/semantics/published |
Databáze: | OpenAIRE |
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