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Related Experiment Video

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Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation

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Ice-water hand immersion causes a reflex decrease in skin temperature in the contralateral hand.

Youzou Isii¹, Kanji Matsukawa, Hirotsugu Tsuchimochi

¹Department of Physiology, Graduate School of Health Sciences, Hiroshima University, Hiroshima, 734-8551 Japan.

The Journal of Physiological Sciences : JPS

|September 15, 2007

Summary

Ice-water immersion of one hand triggers a sympathetic response in the other, reducing blood flow and skin temperature. This study found no significant gender difference in this contralateral vasoconstrictor response.

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Area of Science:

Physiology
Thermoregulation
Autonomic Nervous System

Background:

Cutaneous cold stimuli activate sympathetic nerve activity, causing vasoconstriction in the non-exposed contralateral limb.
Previous research suggests potential gender-based differences in physiological responses to cold exposure.

Purpose of the Study:

To investigate whether gender influences the contralateral vasoconstrictor response to unilateral hand immersion in ice-water.
To analyze the spatiotemporal pattern of palm skin temperature changes during cold exposure.

Main Methods:

Eight males and eight females underwent unilateral hand immersion in ice-water for 10 minutes.
Thermography was used to measure the spatiotemporal pattern of palm skin surface temperature in the non-immersed hand.
Cardiovascular parameters (mean arterial blood pressure, heart rate) and cold sensation were monitored.

Main Results:

Ice-water immersion rapidly decreased palm skin temperature in the contralateral hand in all subjects.
The reduction in skin temperature was not significantly different between males and females in terms of duration or magnitude.
Males exhibited significant increases in mean arterial blood pressure and decreases in heart rate, unlike females.

Conclusions:

Cutaneous cold stimuli induce contralateral vasoconstriction, mediated by increased sympathetic nerve activity.
The study found no significant gender difference in the contralateral vasoconstrictor response to unilateral hand cold immersion.
Observed cardiovascular changes suggest potential gender-specific autonomic responses to cold stress.