کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2696333 1565023 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interactions of visual and cognitive stress
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی پزشکی و دندانپزشکی (عمومی)
پیش نمایش صفحه اول مقاله
Interactions of visual and cognitive stress
چکیده انگلیسی

BackgroundThe objective of this research is to assess the ocular and muscular response to long-duration reading under different visual and cognitive difficulty levels.MethodsThirty-five subjects, with 20/20 vision and without history of ocular pathology or cognitive deficits, participated in the study. Subjects read under different visual and cognitive difficulty levels for 6 (30-minute) conditions. Upper and lower orbicularis oculi, frontalis, and trapezius muscle activities were recorded using surface electromyography (EMG). Aperture size, pupil diameter, and pulse rate of the subjects were recorded with a video camera, pulse meter, and ISCAN eye tracker (ISCAN Inc.), respectively.ResultsThe results show that the texts read with a refractive error caused increased orbicularis oculi EMG power and reduced aperture size (P < 0.001). There was no statistically significant difference between the conditions for pulse rate, pupil diameter, or EMG activity of the frontalis and trapezius muscles with either visual or cognitive stress presented in this experiment.ConclusionVisual stress experienced due to reading under an induced refractive error is potentially mediated by a local mechanism, different from the mechanism underlying reading under low contrast or high cognitive demand.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optometry - Journal of the American Optometric Association - Volume 82, Issue 11, November 2011, Pages 689–696
نویسندگان
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