Biomedical subjects

Noriko Tomioka

Publications and source records attributed to Noriko Tomioka.

2 recordsLinked to original sources

PubMed2005

Effects of exercise intensity, posture, pressure on the back and ambient temperature on palmar sweating responses due to handgrip exercises in humans.

We have, by using newly developed ratemeters, attempted to examine the effects of exercise intensity, posture, pressure on the skin of the back, and ambient hyperthermic conditions (approximately 30 degrees C) on the 5-s handgrip exercise-mediated responses of active palmar sweating in humans. Thirty-five right-handed male (n=5) and female (n=30) volunteer students (20.2+/-1.3 years old) participated in the present study. Oral explanation of only the isometric handgrip exercise (IHG) caused a rapid and oscillatory response (pre-operational) of active palmar sweating in almost all subjects (10 of 14 subjects). Performing the IHG for 5-s caused a significant increase in active sweating rate (operation-mediated response) in both ipsi- and contra-lateral palmar surfaces of the thumbs of all subjects. The operation-mediated responses of active palmar sweating to the IHG were reproducible, resulting in no habituation. The increase of operation-mediated responses to the IHG was dependent upon exercise intensity (100-25% maximal voluntary contractions). The IHG-mediated ipsi- and contra-lateral responses of active palmar sweating were significantly decreased by changing the body posture from a seated to a supine position or by pressing the skin of the back. Ambient hyperthermic conditions (approximately 30 degrees C) for 60 min also resulted in a significant decrease in the back-pressure-dependent reduction of the operation-mediated responses of active palmar sweating to the IHG. In conclusion, in order to optimize the precision and reproducibility of clinical tests involving palmar sweating responses, it is important that subjects maintain a constant handgrip force and posture and that ambient temperature be kept under normothermic conditions.

Adult↗

PubMed2003

Arithmetic calculation, deep inspiration or handgrip exercise-mediated pre-operational active palmar sweating responses in humans.

We examined the effects of repetitive mental stimulation such as arithmetic calculations with sequential subtraction or physical tasks such as handgrip exercise and deep breathing on active palmar sweating responses in humans. Thirty-three healthy, male and female volunteer students (20.4+/-2.1 years) participated in the present study. The responses of active palmar sweating were evaluated by using the newly developed ratemeter. The galvanic skin response (GSR) was also recorded in 10 out of 33 subjects. The oral explanation of the stimulation or tasks caused a rapid and wavy active palmar sweating response. The pre-operational responses of active palmar sweating to the stimulation or tasks were also observed by the GSR recording. The mental stimulation- and physical tasks-mediated pre-operational responses were significantly reduced by the trials. The mental stimulation or physical tasks also caused a rapid and oscillatory response of active palmar sweating during operation of the stimulation or tasks. The operation-mediated responses to physical tasks were observed ipsilaterally and contralaterally. The physical task-mediated responses were also reproducible, resulting in no habituation. In contrast, the operation-mediated responses to mental stimulation were reduced significantly by the trials, resulting in a marked habituation. The findings suggest that the mental stimulation- and physical tasks-mediated pre-operational responses of active palmar sweating obtained by using the newly developed ratemeter will make useful tests for evaluating neuronal activity of limbic system including amygdala, sympathetic sudomotor activity in the palmar skin and functional properties of the palmar sweat glands.

Adult↗