Reproducibility of task activation using the Addenbrooke's cognitive examination in healthy controls: A functional Transcranial Doppler ultrasonography study.

Autor: Beishon L; University of Leicester, Department of Cardiovascular Sciences, Leicester, UK. Electronic address: Lb330@le.ac.uk., Williams CAL; University of Leicester, Department of Cardiovascular Sciences, Leicester, UK., Panerai RB; University of Leicester, Department of Cardiovascular Sciences, Leicester, UK; NIHR Leicester Biomedical Research Centre, University of Leicester, Leicester, UK., Robinson TG; University of Leicester, Department of Cardiovascular Sciences, Leicester, UK; NIHR Leicester Biomedical Research Centre, University of Leicester, Leicester, UK., Haunton VJ; University of Leicester, Department of Cardiovascular Sciences, Leicester, UK; NIHR Leicester Biomedical Research Centre, University of Leicester, Leicester, UK.
Jazyk: angličtina
Zdroj: Journal of neuroscience methods [J Neurosci Methods] 2017 Nov 01; Vol. 291, pp. 131-140. Date of Electronic Publication: 2017 Aug 19.
DOI: 10.1016/j.jneumeth.2017.08.019
Abstrakt: Introduction: Cerebral blood flow velocity (CBFv) changes occurring with cognitive stimulation can be measured by Transcranial Doppler ultrasonography (TCD). The aim of this study was to assess the reproducibility of CBFv changes to the Addenbrooke's cognitive examination (ACE-III).
New Method: 13 volunteers underwent bilateral TCD (middle cerebral artery), continuous heart rate (HR, 3-lead ECG, Finometer), beat-to-beat mean arterial pressure (MAP, Finometer), and end-tidal CO 2 (ETCO 2 , capnography). After 5min baseline, all ACE-III tasks were performed in 3 domains (A/B/C). Data presented are population CBFv peak normalised changes and area under the curve (AUC). Statistical analysis was by 2-way repeated measures (ANOVA), intra-class correlation coefficient (ICC), standard error of measurement (SEM) and coefficient of variation (CV).
Results: 12 bilateral data sets were obtained (10 right hand dominant, 6 female). Baseline parameters (MAP, HR, ETCO 2 ) did not differ between visits. All tasks increased CBFv. Only domain A on AUC analysis differed significantly on ANOVA, and one task on post hoc testing (p <0.05). ICC values were poor (<0.4) for most tasks, but 3 tasks produced more consistent results on AUC and peak CBFv analysis (range ICC: 0.15-0.73, peak CV: 16.2-56.1(%), AUC CV: 23.2-60.2(%), peak SEM: 2.5-6.0 (%), AUC SEM: 21.8-135.8 (%*s).
Comparison With Existing Methods: This is the first study to examine reproducibility of CBFv changes to a complete cognitive assessment tool.
Conclusions: Reproducibility of CBFv measurements to the ACE-III was variable. AUC may provide more reliable estimates than peak CBFv responses. These data need validating in patient populations.
(Copyright © 2017 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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