| Autor: |
Lovallo, William, Zeiner, Arthur R. |
| Předmět: |
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| Zdroj: |
Psychophysiology; Jul1974, Vol. 11 Issue 4, p458-471, 14p |
| Abstrakt: |
Two experiments are reported which tested the effect of cold pressor (CP) stimulation on cutaneous vasomotor activity. Both experiments confirm earlier findings that some Ss show decreased digital blood volume to CP (constrictors) while others show an increase (dilators). In Experiment I, it is demonstrated that the constrictor-dilator responses cannot be attributed to differential response to instruction. A superimposed reaction time task is shown not to change ongoing response to CP. Experiment II investigates the effects of levels of tonic activity upon response to CP stimulation in males and females by two methods: experimental manipulation of tonic level by shock and independent measurement of tonic sympathetic activity by other physiological measures (pulse amplitude and skin conductance). Resting levels of pulse wave amplitude are significantly correlated with response to CP, the higher the amplitude, the greater the time to blood volume rebound. The results tentatively support the hypothesis that constrictors and dilators differ in sympathetic vasomotor tonus prior to cold pressor. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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