Skin conductance and heart rate in women with premenstrual syndrome.

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Abstract
This study investigated the effects of the menstrual cycle phase on certain components of automomic arousal and task performance. Premenstrual syndrome (PMS) women and matched controls (non-PMS) were tested both premenstrually and postmenstrually. The conditions selected were a) the presentation of 10 tones, b) a proofreading performance task, and c) a word-association learning task. Skin conductance and heart rate were continuously monitored. No significant effects were found on baseline physiological measures, or on proofreading or word-association performance. A significant points in cycle effect for skin conductance and HR orienting response to the tones was fund showing smaller HR and skin conductance responses postmenstrually. Severally significant PMS classifications by point in menstrual cycle interactions were found. These indicated that, paradoxically, the non-PMS subjects showed higher spontaneous skin conductance responding during the word association task and higher skin conductance responses to tones prior to menses. While in contrast, PMS subjects yielded higher responding on the same measures postmenstrually. On stress ratings, PMS subjects reported experiencing more stress postmenstrually. Results are discussed in terms of the possible role of expectancy factors and inaccurate self-monitoring.

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