کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8146546 | 1524110 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Infrared thermography based studies on the effect of age on localized cold stress induced thermoregulation in human
ترجمه فارسی عنوان
مطالعات مبتنی بر ترموگرافی مادون قرمز در مورد اثر سن بر تنظیم حرارت در ناحیه سرماخوردگی موضعی در انسان است
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کلمات کلیدی
ترموگرافی مادون قرمز، تنظیم حرارتی، تحریک سرد، واکسن تنفسی پوستی، دمای پودر ورقه
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک اتمی و مولکولی و اپتیک
چکیده انگلیسی
Thermoregulatory control of blood flow plays an important role in maintaining the human body temperature and it provides physiological resistance against extreme environmental thermal stresses. To understand the role of age on thermal signals from veins and the thermoregulatory mechanism, the dynamic variation of the vein temperature on the hands of 17 human subjects, under a localized cold stress, was studied using infrared thermography. It was observed that the vein temperature of the stimulated hand initially decreased with time up to a time interval (called 'inversion time'), which was attributed to the localized cutaneous vasoconstriction. Beyond inversion time, a rise in the vein temperature of the stimulated hand was observed. A shift in the inversion time to higher values was observed for the older subjects, which was attributed to the reduced efficiency and responsiveness of the cutaneous vasoconstriction mechanism in these subjects. Our studies indicated that the inversion time increased linearly with subject age with strong positive Pearson's correlation coefficient of 0.94. It was also observed that the contralateral symmetry in vasoconstriction was much lower in older subjects than the younger subjects. The absolute difference between the left and right inversion time varied between 11-118Â s and 5-28Â s for the older and younger subjects, respectively. Our study clearly demonstrated that infrared thermography is one of the most effective experimental tool for studying dynamic variation in vein pixel temperature under localized thermal stresses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Infrared Physics & Technology - Volume 76, May 2016, Pages 592-602
Journal: Infrared Physics & Technology - Volume 76, May 2016, Pages 592-602
نویسندگان
B.B. Lahiri, S. Bagavathiappan, K. Nishanthi, K. Mohanalakshmi, L. Veni, Saumya Saumya, S.M. Yacin, John Philip,