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首页> 外文期刊>European journal of neurology: the official journal of the European Federation of Neurological Societies >Functional transcranial Doppler assessment of cerebral blood flow velocities changes during attention tasks.
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Functional transcranial Doppler assessment of cerebral blood flow velocities changes during attention tasks.

机译：功能性经颅多普勒评估注意任务期间脑血流速度的变化。

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BACKGROUND AND PURPOSE: Aim of our study was to evaluate cerebral hemodynamic changes during performance of attention tasks and to correlate them with reaction time (RT) and percentage of right answers. METHODS: Mean flow velocity (MFV) in middle cerebral arteries was monitored in 30 subjects by transcranial Doppler during tonic alertness, phasic alertness, focused and divided attention tasks. RESULTS: Mean flow velocity increase was significantly higher during divided attention with respect to other tasks (P < .001). MFV increase was higher in the right than in the left side (P < .001). Asymmetry during attention tasks resulted significantly higher than that observed in tonic alertness condition. RT was increased during focused attention tasks (P < .001 vs. both alert tasks), with further increase during divided attention tasks (P < .001 vs. focused attention task). RT was inversely related to MFV increase only during tonic alertness (P = 0.012 for left side; P = 0.008 for right side). During the divided attention tasks, an association was found between MFV increase and correct answers (r = 0.39, P = 0.033). CONCLUSIONS: These data show a relationship between RT, correct answers and changes in blood flow velocity and suggest that this method of cerebral blood flow investigation could be a useful approach during assessment of patients with attention deficit.
机译：背景与目的：我们的研究目的是评估注意任务执行过程中的脑血流动力学变化，并将其与反应时间（RT）和正确答案的百分比相关联。方法：通过颅多普勒监测30名受试者在大脑中动脉的平均流速（MFV），该过程在进补警觉，阶段性警觉，集中注意力和分散注意力任务中进行。结果：在其他任务分散注意力期间，平均流速增加明显更高（P <.001）。右侧的MFV增加高于左侧的（P <.001）。注意任务期间的不对称性明显高于在进补警觉状态下观察到的不对称性。在注意力集中任务期间，RT增加（P <.001 vs.两个警报任务），在分散注意力任务期间，RT进一步增加（P <.001 vs.集中注意力任务）。仅在进补警觉期间，RT与MFV的增加呈负相关（左侧P = 0.012;右侧P = 0.008）。在分散注意力的任务中，发现MFV增加与正确答案之间存在关联（r = 0.39，P = 0.033）。结论：这些数据显示了RT，正确答案和血流速度变化之间的关系，并表明这种脑血流调查方法可能是评估注意力缺陷患者的有用方法。

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