We evaluated cold sensation at rest and in response to exercise-induced changes in core and skin temperatures in cold-sensitive exercise trained females. Fifty-eight trained young females were screened by a questionnaire, selecting cold-sensitive (Cold-sensitive, n = 7) and non-cold-sensitive (Control, n = 7) individuals. Participants rested in a room at 29.5°C for ~100 min after which ambient ...

OBJECTIVE Fitzpatrick's Skin Type Classification Scale often is used to assess sun sensitivity and skin cancer risk. Because the scale was developed with Whites, its utility and validity with Blacks may be limited by its reliance on the European-cultural terms suntan and sunburn. We tested the hypothesis that most Blacks would be unable to classify their skin into the four Fitzpatrick skin type...

Touch perception begins with activation of low-threshold mechanoreceptors (LTMRs) in the periphery. LTMR terminals exhibit tremendous morphological heterogeneity that specifies their mechanical receptivity. In a survey of mammalian skin, we found a preponderance of neurofilament-heavy-chain(+) circumferential endings associated with hair follicles, prompting us to develop a genetic strategy to ...

Quantifying naturally occurring strains in soft materials, such as those of the human body, requires strain gauges with equal or greater mechanical compliance. This manuscript reports materials and mechanics approaches are reported for an all-elastomer strain measurement device with gauge factor as high as 29 and with Young’s modulus that approaches that of the human epidermis. These systems us...

We have shown that cutaneous cooling-sensitive receptors can work as thermostats of skin temperature against cooling. However, molecule of the thermostat is not known. Here, we studied whether cooling-sensitive TRPM8 channels act as thermostats. TRPM8 in HEK293 cells generated output (y) when temperature (T) was below threshold of 28.4°C. Output (y) is given by two equations: At T >28.4°C, y = ...

In order to realize a wide area of a soft sensor skin covering the entire body of robots, several ideas of wireless tactile elements have been presented[1][2]. But those papers described only the sensing chip designs, and no methods of their equipment on a real robot had been shown. In this paper we propose a 1-D film coil array to power wireless tactile sensor chips and obtain sensing signals ...