A team of Japanese researchers led by Tamaki Matsumoto from the International Buddhist University in Osaka investigated whether the activity of the autonomic nervous system, which plays a vital role in equilibrium within the human body, changed during the menstrual cycle. The team measured heart rate variability and hormone levels and used questionnaires to evaluate physical, emotional and behavioural symptoms accompanying 62 women’s menstrual cycles.
For the parameters Matsumoto’s team was testing, the control group with little or no menstrual symptoms did not vary during the month. However women suffering from PMS saw results reflecting autonomic and parasympathetic nerve activity decrease significantly in the late luteal phase, which precedes menstruation. Those with the most marked symptoms (known as premenstrual dysphoric disorder) had lower rates of nerve activity than the other groups during the entire menstrual cycle.
“Our findings indicate that the occurrence of premenstrual symptomatology could be attributable to an altered functioning of the autonomic nervous system in the symptomatic late luteal phase,” says Matsumoto. For women with PMDD, findings indicate that sympathovagal activity was altered even in the follicular phase. Matsumoto asks: “Does this imply that women with lower autonomic function regardless of the menstrual cycle are vulnerable to more severe premenstrual disorders? At the moment, the underlying biomechanisms of PMS remain enigmatic.”
PMS comprises myriad non-specific physical, emotional, behavioural, and cognitive symptoms that occur in the days prior to menstruation and is nearly omnipresent in women of reproductive age from all cultures and socio-economic levels. The most prevalent symptoms include: irritability, mood lability, depression, anxiety, impulsivity, feelings of “loss of control,” fatigue, decreased concentration, abdominal bloating, fluid retention, breast swelling, and general aches.
Purdue cancer identity technology makes it easier to find a tumor's 'address'
16.11.2018 | Purdue University
Microgel powder fights infection and helps wounds heal
14.11.2018 | Michigan Technological University
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
19.11.2018 | Event News
09.11.2018 | Event News
06.11.2018 | Event News
19.11.2018 | Materials Sciences
19.11.2018 | Information Technology
19.11.2018 | Life Sciences