scholarly journals Influence of infrared camera model and evaluator reproducibility in the assessment of skin temperature responses to physical exercise

2021 ◽  
Vol 98 ◽  
pp. 102913
Author(s):  
Álvaro S. Machado ◽  
Jose Ignacio Priego-Quesada ◽  
Irene Jimenez-Perez ◽  
Marina Gil-Calvo ◽  
Felipe Pivetta Carpes ◽  
...  
Keyword(s):  
Physical Exercise ◽  
Skin Temperature ◽  
Infrared Camera ◽  
Camera Model ◽  
Temperature Responses

scholarly journals The Effect of Moxibustion Stimulation on Local and Distal Skin Temperature in Healthy Subjects

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Ying Li ◽  
Chao Sun ◽  
Jiujie Kuang ◽  
Changchun Ji ◽  
Jiangtao Wu
Keyword(s):  
Skin Temperature ◽  
Sympathetic Nerve ◽  
Infrared Camera ◽  
Reflex Response ◽  
Temperature Changes ◽  
Group Iii ◽  
Cooling Period ◽  
Group I ◽  
Temperature Responses ◽  
Skin Temperatures

The aim of this study is to investigate the response of local and distal skin temperature to moxibustion stimulation (MS) and explore the effects of MS on sympathetic nerve activity. The distal skin temperatures of fingertips, as an indicator for sympathetic reflex response, were recorded using infrared camera during resting period (10 min), MS period (10 min), and natural cooling period (15 min), respectively. The MS without ash cleaning (AC) was applied to acupoints Quze (PC3) (Group I) and Lao Gong (PC8) (Group II), respectively. In Group III, the MS with the operation of AC was performed on PC8. The temperature responses of the local stimulation points and corresponding control points were also investigated. At the beginning of MS period, a significant increase of temperature on the stimulation point accompanied by a simultaneous reduction of temperature on fingertips was observed. A marked negative correlation was also obtained between temperature changes in the stimulation point and in the fingertips. At the end of natural cooling period (t = 34 min), the temperature of stimulation point was obviously higher than baseline values. In contrast, the temperatures of fingertips increased and then returned to the baseline levels during the second minute of MS period. In Group III, the temperature of stimulation point increased every time with the operation of AC, accompanied by the temperature decrease of middle fingertip. The findings suggest that moxibustion may trigger the sympathetic nervous system and induce the reduction of microcirculation, accompanied by a reduction of fingertip temperature. In addition, the operation of AC caused repeated cycles of thermal stimulation on the stimulation point, which may repetitively activate cutaneous sympathetic nerve fibres and evoke the temperature reduction of fingertips.

Effect of continuous cold exposure on nocturnal body temperatures of man

1959 ◽  
Vol 14 (1) ◽  
pp. 43-45 ◽  
Author(s):  
M. B. Kreider ◽  
P. F. Iampietro ◽  
E. R. Buskirk ◽  
David E. Bass
Keyword(s):  
Body Temperature ◽  
Cold Stress ◽  
Skin Temperature ◽  
Rectal Temperature ◽  
Cold Exposure ◽  
Control Period ◽  
Cold Period ◽  
Body Temperatures ◽  
Temperature Responses

Effects of continuous cold stress on 24-hour patterns of body temperature were studied in five men. Cold stress consisted in living at 15.6℃ (60℉) for 14 days wearing only shorts. The cold period was preceded and followed by 2 weeks at 26.7℃ (80℉). Activity (minimal) and diet were the same for all periods. One blanket was used at night. Rectal temperature (Tr) and skin temperature (Ts) were measured. Tr during sleep fell more rapidly and to lower values during cold exposure (35.6℃) than during the control period (36.1℃). Ts during sleep was slightly lower in the cold than in the control period; also, Ts did not exhibit the gradual drop characteristic of sleep in the control period. Comparison of Tr and Ts between early and later cold days revealed the following differences: a) nocturnal Tr fell to lower levels on the later cold days; b) nocturnal toe temperatures were 15℃ (27℉) higher on the later cold days. The arch temperatures followed the same pattern as the toes. No significant differences were found in daytime temperatures between early and later cold days. The data suggest that evidence for acclimatization to cold in terms of altered body temperature responses may be fruitfully sought in responses during rewarming and/or sleep. Submitted on September 19, 1958

Thermography as a Means of Blood Perfusion Measurement

1979 ◽  
Vol 101 (4) ◽  
pp. 246-249 ◽  
Author(s):  
J. E. Francis ◽  
R. Roggli ◽  
T. J. Love ◽  
C. P. Robinson
Keyword(s):  
Blood Flow ◽  
Skin Temperature ◽  
Strain Gage ◽  
Infrared Camera ◽  
Blood Perfusion ◽  
The Body ◽  
Perfusion Rate ◽  
Perfusion Measurement ◽  
Blood Perfusion Rate ◽  
Human Forearm

The scanning infrared camera has been used to verify an analytical model relating blood perfusion rate to skin temperature. The blood perfusion rates were measured with both the mercury strain gage and the volume plethysmograph on the human forearm. Thermograms were taken of the forearm and temperature measured using an optical densitometer. Comparison of the volume plethysmograph with the strain gage, and the thermograms with the strain gage indicate thermography to be a useful means of measuring blood flow. Thermography has the advantages of being noninvasive and can be used to measure blood perfusion in parts of the body not easily monitored with occlusive techniques.

Peripheral skin temperature responses to hot and cold suggestions

1973 ◽  
Vol 21 (3) ◽  
pp. 205-212 ◽  
Author(s):  
Joseph E. Peters ◽  
Richard M. Lundy ◽  
Robert M. Stern
Keyword(s):  
Skin Temperature ◽  
Temperature Responses

scholarly journals Infrared assessment of human facial temperature in the presence and absence of common cosmetics

2020 ◽  
Author(s):  
Kaikai Zheng ◽  
Ruoyu Dong ◽  
Huan Wang ◽  
Steve Granick
Keyword(s):  
Skin Temperature ◽  
Human Subjects ◽  
Infrared Camera ◽  
Temperature Sensing ◽  
Laboratory Setting ◽  
Cosmetic Products ◽  
Research Grade ◽  
Presence And Absence ◽  
Volatile Liquids

ABSTRACTUsing a sensitive research-grade infrared camera, we find that common facial cosmetics and lotions mask skin temperature in assays of the human forehead. We test a family of 10 commonly-used cosmetic products and find that volatile liquids and creams lower thermal skin temperature by at least 2 C for up to 5-10 min and at least 1 C for up to 20 min, respectively. Powder and cream that contains brightening agent lower indefinitely the skin temperature sensed by infrared camera. With the qualification that these experiments were performed in a controlled laboratory setting rather than the mass crowd screening environment where infrared temperature sensing of humans sees widespread use, our tests suggest that for human subjects whose face was treated with certain cosmetics and lotions, infrared-based screening for elevated facial temperature (fever) can be unreliable.

Temperature and creatine kinase changes during a 10-day taper period in sprinters

2021 ◽  
Author(s):  
Paweł Korman ◽  
Krzysztof Kusy ◽  
Adam Kantanista ◽  
Anna Straburzynska-Lupa ◽  
Jacek Zielinski
Keyword(s):  
Creatine Kinase ◽  
Circadian Rhythm ◽  
Skin Temperature ◽  
Infrared Camera ◽  
The Body ◽  
Base Temperature ◽  
Power Training ◽  
Progressive Reduction ◽  
Training Camp ◽  
Temperature Levels

Abstract Objective.The aim of this prospective cohort study, performed during a 10-day training camp, was to analyze the effect of a series of successive speed-power training sessions on the concurrent circadian changes in resting leg skin temperature and blood creatine kinase (CK) levels and to determine the correlation between them. Approach. Seventeen elite sprinters, aged 22‒31 years, were examined. Every morning and evening, capillary blood samples were drawn to assay CK levels. Lower limb skin temperature was measured simultaneously, and thermal images were taken using an infrared camera. Main results. From the first day of the training camp, the base temperature levels began to drop to obtain a significant reduction from the 6th day (male) and from the 8th day (female) to the end of the camp . Simultaneously, CK levels increased in the male group from 8th to the end of the camp, but it did not change significantly in females. Regarding the circadian rhythm, the CK levels always rose during the day and declined during the night. The temperature decreased during the day and increased during the night until the 6th day. After that, the temperature changed oppositely till the end of camp, i.e. it increased during the day and decreased during the night. This could suggest that the training microcycle should last about a week because after this time there may be a disturbance in the temperature circadian rhythm and a significant CK accumulation Significance. Multi-day speed-power training induced a progressive reduction in resting skin temperature and an elevation in CK levels. It also altered the circadian rhythm of the body skin temperature, which may indicate that after about 6 days of regular exercise, physiological deregulation may occur.

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