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How the brain controls sex and attraction
Researchers discover how the brain triggers our attraction to the opposite sex and sexual behavior.
Scientists made a significant advancement in figuring out how the brain is controlling sex.
By studying female mice, the researchers discovered that a brain hormone called kisspeptin (not surprisingly also known as the “kiss hormone”) is the driving force in our attraction to the opposite sex as well as sexual behavior. The scientists found that a male mouse secretes pheromones to activate the kisspeptin neurons which send this signal along to other neurons. These, in turn, release the gonadotropin hormones that control attraction to the opposite sex. The kisspeptins also transmit signals to cells that make the neurotransmitter nitric oxide, responsible for triggering our sexual behavior.
The research was led by Professor Julie Bakker, who heads the Laboratory of Neuroendocrinology at Liège University in Belgium, and Professor Ulrich Boehm, who teaches in the department of Experimental and Clinical Pharmacology and Toxicology of Saarland University in Germany.
"This work has provided new insight into how the brain decodes signals from the outside world and then translates these environmental cues into behavior, “ explained Boehm. “In many animals, sexual behavior is timed to occur with ovulation to ensure the highest possible chance of fertilization and therefore, continuation of the species. Until now, little was known about how the brain ties together ovulation, attraction and sex. Now we know that a single molecule - kisspeptin - controls all of these aspects through different brain circuits running in parallel with one another.”
The study suggests kisspeptin is the one molecule that rules them all, controlling puberty, fertility, attraction and sex. Professor Julie Bakker thinks one application of their discovery is creating therapies for women with low sexual desire, a condition estimated to affect up to 40% of women at some time in their lives.
"There are currently no good treatments available for women suffering from low sexual desire, “ said Bakker. “The discovery that kisspeptin controls both attraction and sexual desire opens up exciting new possibilities for the development of treatments for low sexual desire.”
You can read the study here, in Nature Communications.
What is human dignity? Here's a primer, told through 200 years of great essays, lectures, and novels.
- Human dignity means that each of our lives have an unimpeachable value simply because we are human, and therefore we are deserving of a baseline level of respect.
- That baseline requires more than the absence of violence, discrimination, and authoritarianism. It means giving individuals the freedom to pursue their own happiness and purpose.
- We look at incredible writings from the last 200 years that illustrate the push for human dignity in regards to slavery, equality, communism, free speech and education.
The inherent worth of all human beings<p>Human dignity is the inherent worth of each individual human being. Recognizing human dignity means respecting human beings' special value—value that sets us apart from other animals; value that is intrinsic and cannot be lost.</p> <p>Liberalism—the broad political philosophy that organizes society around liberty, justice, and equality—is rooted in the idea of human dignity. Liberalism assumes each of our lives, plans, and preferences have some unimpeachable value, not because of any objective evaluation or contribution to a greater good, but simply because they belong to a human being. We are human, and therefore deserving of a baseline level of respect. </p> <p>Because so many of us take human dignity for granted—just a fact of our humanness—it's usually only when someone's dignity is ignored or violated that we feel compelled to talk about it. </p> <p>But human dignity means more than the absence of violence, discrimination, and authoritarianism. It means giving individuals the freedom to pursue their own happiness and purpose—a freedom that can be hampered by restrictive social institutions or the tyranny of the majority. The liberal ideal of the good society is not just peaceful but also pluralistic: It is a society in which we respect others' right to think and live differently than we do.</p>
From the 19th century to today<p>With <a href="https://books.google.com/ngrams/graph?year_start=1800&year_end=2019&content=human+dignity&corpus=26&smoothing=3&direct_url=t1%3B%2Chuman%20dignity%3B%2Cc0" target="_blank" rel="noopener noreferrer">Google Books Ngram Viewer</a>, we can chart mentions of human dignity from 1800-2019.</p><img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0ODU0My9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTY1MTUwMzE4MX0.bu0D_0uQuyNLyJjfRESNhu7twkJ5nxu8pQtfa1w3hZs/img.png?width=980" id="7ef38" class="rm-shortcode" data-rm-shortcode-id="9974c7bef3812fcb36858f325889e3c6" data-rm-shortcode-name="rebelmouse-image" />
American novelist, writer, playwright, poet, essayist and civil rights activist James Baldwin at his home in Saint-Paul-de-Vence, southern France, on November 6, 1979.
Credit: Ralph Gatti/AFP via Getty Images
The future of dignity<p>Around the world, people are still working toward the full and equal recognition of human dignity. Every year, new speeches and writings help us understand what dignity is—not only what it looks like when dignity is violated but also what it looks like when dignity is honored. In his posthumous essay, Congressman Lewis wrote, "When historians pick up their pens to write the story of the 21st century, let them say that it was your generation who laid down the heavy burdens of hate at last and that peace finally triumphed over violence, aggression and war."</p> <p>The more we talk about human dignity, the better we understand it. And the sooner we can make progress toward a shared vision of peace, freedom, and mutual respect for all. </p>
Scientists find that bursts of gamma rays may exceed the speed of light and cause time-reversibility.
- Astrophysicists propose that gamma-ray bursts may exceed the speed of light.
- The superluminal jets may also be responsible for time-reversibility.
- The finding doesn't go against Einstein's theory because this effect happens in the jet medium not a vacuum.
Jet bursting out of a blazar. Black-hole-powered galaxies called blazars are the most common sources detected by NASA's Fermi Gamma-ray Space Telescope.
Cosmic death beams: Understanding gamma ray bursts<div class="rm-shortcode" data-media_id="cu2knVEk" data-player_id="FvQKszTI" data-rm-shortcode-id="c6cfd20fdf31c82cb206ade8ce21ba3f"> <div id="botr_cu2knVEk_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/cu2knVEk-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/cu2knVEk-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/cu2knVEk-FvQKszTI.js"></script> </div>
Philosophers have been asking the question for hundreds of years. Now neuroscientists are joining the quest to find out.
- The debate over whether or not humans have free will is centuries old and ongoing. While studies have confirmed that our brains perform many tasks without conscious effort, there remains the question of how much we control and when it matters.
- According to Dr. Uri Maoz, it comes down to what your definition of free will is and to learning more about how we make decisions versus when it is ok for our brain to subconsciously control our actions and movements.
- "If we understand the interplay between conscious and unconscious," says Maoz, "it might help us realize what we can control and what we can't."
Puerto Rico's iconic telescope facilitated important scientific discoveries while inspiring young scientists and the public imagination.
- The Arecibo Observatory's main telescope collapsed on Tuesday morning.
- Although officials had been planning to demolish the telescope, the accident marked an unceremonious end to a beloved astronomical tool.
- The Arecibo radio telescope has facilitated many discoveries in astronomy, including the mapping of near-Earth asteroids and the detection of exoplanets.
Bradley Rivera via twitter.com<p>In 1963, the concave dish was built into a natural sinkhole on the northern coast of Puerto Rico. The location was <a href="https://www.space.com/20984-arecibo-observatory.html" target="_blank">picked because it was near the equator,</a> providing scientists a clear view of planets passing overhead, and also of the ionosphere, which is the uniquely reactive layer of Earth's upper atmosphere where the northern lights form.</p><p>Since its construction, scientists have used the Arecibo telescope to map near-Earth asteroids, detect gravitational waves, study pulsars, detect exoplanets and <a href="https://www.seti.org/goodbye-arecibo" target="_blank">search for alien civilizations</a>, among other projects. Here's a brief look at some of the discoveries and accomplishments made using the Arecibo telescope:</p><ul><li>1964: Astronomer <a href="https://en.wikipedia.org/wiki/Gordon_Pettengill" target="_blank" rel="noopener noreferrer">Gordon Pettengill</a> discovers that Mercury's rotation period is 59 days, significantly shorter than the previous prediction of 88 days.</li><li>1974: Physicists Russell Alan Hulse and Joseph Hooton Taylor Jr. discovers the first binary pulsar, for which they won a Nobel Prize in Physics.</li><li>1974: Scientists use the telescope to transmit the "Arecibo message" to <a href="https://en.wikipedia.org/wiki/Great_Globular_Cluster_in_Hercules" target="_blank" rel="noopener noreferrer">globular star cluster M13</a>. The message, when translated into image form, contains basic information about humanity and human knowledge: the numbers one to 10, a map of our solar system, an illustration of a human being, and the atomic numbers of certain elements.</li><li>1989: Scientists use the telescope to image an asteroid for the first time.</li><li>1992: Astronomers Alex Wolszczan and Dale Frail become the first to discover exoplanets.</li></ul>
The Google-owned company developed a system that can reliably predict the 3D shapes of proteins.