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• W2951909497 abstract "The present pilot study was aimed at conducting a comparative analysis of the level of activation in the prefrontal cortex among a normal elderly group and amnestic and nonamnestic mild cognitive impairment (MCI) groups and investigating the presence of neural compensatory mechanisms according to types of MCI and different cognitive tasks. We performed functional near-infrared spectroscopy (fNIRS) along with cognitive tasks, including two-back test, Korean color word Stroop test, and semantic verbal fluency task (SVFT), to investigate hemodynamic response and the presence of neural compensation and neuroplasticity in the prefrontal cortex of patients with amnestic and nonamnestic MCI compared with a healthy elderly group. During the two-back test, there was no significant difference in the bilateral region-of-interest (ROI) analysis in the three groups. During the Stroop test, right-sided hyperactivation compared to the left side during the task was shown in the nonamnestic MCI and normal groups with statistical significance. Mean <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mtext>acc</mml:mtext><mml:mi>∆</mml:mi><mml:msub><mml:mrow><mml:mtext>HbO</mml:mtext></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:mtext> </mml:mtext></mml:math> on the right side was highest in the nonamnestic MCI group (0.30 μM) followed by the normal group (0.07 μM ) and the amnestic MCI group (-0.10 μM ). Otherwise, intergroup ROI analysis of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mtext>acc</mml:mtext><mml:mi>∆</mml:mi><mml:msub><mml:mrow><mml:mtext>HbO</mml:mtext></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> in these activated right sides showed no significant difference. During the VFT test, there was no significant difference in the bilateral region-of-interest analysis in the three groups. The highest mean <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:mtext>acc</mml:mtext><mml:mi>∆</mml:mi><mml:msub><mml:mrow><mml:mtext>HbO</mml:mtext></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> was shown in the normal group (0.79 μM ) followed by the nonamnestic MCI group (0.52 μM ) and the amnestic MCI group (0.21 μM) . Otherwise, there was no significant difference between groups. The hemodynamic response during fNIRS showed different findings according to MCI types and cognitive tasks. Among the three tasks, the Stroop test showed results that were suggestive of neural compensatory mechanisms in the prefrontal cortex in nonamnestic MCI." @default.
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• W2951909497 date "2019-06-19" @default.
• W2951909497 modified "2023-10-15" @default.
• W2951909497 title "Neural Compensatory Response During Complex Cognitive Function Tasks in Mild Cognitive Impairment: A Near-Infrared Spectroscopy Study" @default.
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• W2951909497 doi "https://doi.org/10.1155/2019/7845104" @default.
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