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Journal Article
Research Support, Non-U.S. Gov't
Abnormal spontaneous brain activity is associated with impaired emotion and cognition in hyperthyroidism: A rs-fMRI study.
Behavioural Brain Research 2018 October 2
Hyperthyroid patients undergo emotional and cognitive dysfunction. However, the neurological basis for it remains ambiguous. Amplitude of low frequency fluctuation (ALFF) and regional homogeneity (ReHo) were used to investigate abnormal spontaneous activity in hyperthyroidism for the first time. 29 hyperthyroid patients and 29 healthy controls (HC) received 3.0T magnetic resonance imaging (MRI) scans and neuropsychological assessments. Compared with HC, hyperthyroid patients showed decreased ALFF in left medial frontal gyrus (MeFG) and left posterior cingulate cortex (PCC). Hyperthyroidism group exhibited decreased ReHo in left MeFG. Within hyperthyroidism group, ALFF values in left MeFG were positively correlated with Hamilton Anxiety Rating Scale (HARS) Z-scores, but negatively correlated with processing speed Z-scores. Besides, ALFF values in left precuneus had a positive correlation with HARS Z-scores. As a result, abnormal brain spontaneous activity mainly in default mode network (DMN) implicated the neuro-pathological substrate of relevant emotional and cognitive dysfunction in hyperthyroid patients.
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