کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4346916 1296811 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of sensory modality on cerebral blood flow velocity during vigilance
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Effects of sensory modality on cerebral blood flow velocity during vigilance
چکیده انگلیسی
Transcranial Doppler sonography was used to measure cerebral blood flow velocity (hemovelocity, CBFV) from the left and right middle cerebral arteries during the performance of 40-min auditory and visual vigilance tasks. Reductions in stimulus duration were the critical signals for detection in both tasks, which were equated for stimulus salience and discrimination difficulty. Signal detection responses (correct detections and false alarms) and CBFV declined significantly over time in a linear manner for both modalities. In addition, the overall level of CBFV and the temporal decline in this measure were greater in the right than the left cerebral hemisphere. The results are consistent with the view that a right hemispheric system is involved in the functional control of vigilance and that this system operates in a similar manner in the auditory and visual channels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 461, Issue 3, 15 September 2009, Pages 207-211
نویسندگان
, , , , , , ,