Effect of premenstrual stress on autonomic function

Area of Science:

• Physiology
• Neuroendocrinology
• Women's Health

Background:

• Premenstrual syndrome (PMS) is recognized as a psychoneuroendocrine stress-related disorder.
• Understanding the physiological underpinnings of PMS is crucial for effective management.

Purpose of the Study:

• To investigate the impact of premenstrual stress on autonomic nervous system function.
• To compare autonomic responses during the premenstrual and postmenstrual phases in women with and without PMS.

Main Methods:

• Autonomic function was assessed in 80 eumenorrheic females (18-25 years).
• Measurements included basal heart rate, blood pressure, and systolic/diastolic responses to cold stimulus.
• Participants were categorized into a control group (n=40) and a premenstrual syndrome group (n=40).

Main Results:

• Significantly increased autonomic nervous activity was observed during the premenstrual phase in the PMS group.
• Elevated heart rate, blood pressure, and cold stimulus responses were noted in the premenstrual phase.
• The difference in autonomic function between premenstrual and postmenstrual phases was significantly greater in the PMS group compared to controls.

Conclusions:

• The altered physiological responses in PMS are attributed to heightened sympathetic activity.
• Hormonal fluctuations during the premenstrual phase likely modulate neurotransmitters, leading to increased sympathetic drive.
• These findings highlight the role of the autonomic nervous system in the pathophysiology of premenstrual syndrome.