Thursday, November 30, 2006

Women talk three times as much as men, says study

It is something one half of the population has long suspected - and the other half always vocally denied. Women really do talk more than men.

In fact, women talk almost three times as much as men, with the average woman chalking up 20,000 words in a day - 13,000 more than the average man.

Read more...
• Heels on wheels as Paris takes Lindsay and Britney out for a spin
• Women spend eight years of their life shopping
• Transformed in 40 weeks, woman with a new face


Women also speak more quickly, devote more brainpower to chit-chat - and actually get a buzz out of hearing their own voices, a new book suggests.

The book - written by a female psychiatrist - says that inherent differences between the male and female brain explain why women are naturally more talkative than men.

In The Female Mind, Dr Luan Brizendine says women devote more brain cells to talking than men.

And, if that wasn't enough, the simple act of talking triggers a flood of brain chemicals which give women a rush similar to that felt by heroin addicts when they get a high.

Dr Brizendine, a self-proclaimed feminist, says the differences can be traced back to the womb, where the sex hormone testosterone moulds the developing male brain.

The areas responsible for communication, emotion and memory are all pared back the unborn baby boy.

The result is that boys - and men - chat less than their female counterparts and struggle to express their emotions to the same extent.

"Women have an eight-lane superhighway for processing emotion, while men have a small country road," said Dr Brizendine, who runs a female "mood and hormone" clinic in San Francisco.

There are, however, advantages to being the strong, silent type. Dr Brizendine explains that testosterone also reduces the size of the section of the brain involved in hearing - allowing men to become "deaf" to the most logical of arguments put forward by their wives and girlfriends.

But what the male brain may lack in converstation and emotion, they more than make up with in their ability to think about sex.

Dr Brizendine says the brain's "sex processor" - the areas responsible for sexual thoughts - is twice as big as in men than in women, perhaps explaining why men are stereotyped as having sex on the mind.

Or, to put it another way, men have an international airport for dealing with thoughts about sex, "where women have an airfield nearby that lands small and private planes".

Studies have shown that while a man will think about sex every 52 seconds, the subject tends to cross women's minds just once a day, the University of California psychiatrist says.

Dr Brizendine, whose book is based on her own clinical work and analyses of more than 1,000 scientific studies, added: "There is no unisex brain.

"Girls arrive already wired as girls, and boys arrive already wired as boys. Their brains are different by the time they're born, and their brains are what drive their impulses, values and their very reality.

"I know it is not politically correct to say this but I've been torn for years between my politics and what science is telling us.

"I believe women actually perceive the world differently from men.

"If women attend to those differences they can make better decisions about how to manage their lives."

Other scientists, however, are sceptical about the effects of testosterone on the brain and say many of the differences between the male and female personality can be explained by social conditioning, with a child's upbringing greatly influencing their character.

Deborah Cameron, an Oxford University linguistics professor with a special interest in language and gender, said the amount we talk is influenced by who we are with and what we are doing.

She added: "If you aggregate a large number of studies you will find there is little difference between the amount men and women talk."

Already available in the US, The Female Brain will be available in the UK from April.


By FIONA MACRAE

New Advice: Don't Sit Up Straight

The longstanding advice to "sit up straight" has been turned on its head by a new study that suggests leaning back is a much better posture.

ADVERTISEMENT

Researchers analyzed different postures and concluded that the strain of sitting upright for long hours is a perpetrator of chronic back problems.


Using a new form of magnetic resonance imaging (MRI), researchers studied 22 volunteers with no back pain history. The subjects assumed three different positions: slouching; sitting up straight at 90 degrees; and sitting back with a 135-degree posture—all while their spines were scanned.


"A 135-degree body-thigh sitting posture was demonstrated to be the best biomechanical sitting position, as opposed to a 90-degree posture, which most people consider normal," said study author, Waseem Amir Bashir, a researcher at the University of Alberta Hospital in Canada. "Sitting in a sound anatomic position is essential, since the strain put on the spine and its associated ligaments over time can lead to pain, deformity and chronic illness."


Back pain, according to the National Institute of Neurological Disorders and Stroke, is the most common cause of work-related disability in the United States. It costs Americans nearly $50 billion annually. Sitting appears to be a major cause of this ailment.


"We were not created to sit down for long hours, but somehow modern life requires the vast majority of the global population to work in a seated position," Bashir said. "This made our search for the optimal sitting position all the more important."here


When strain is placed on the spine, the spinal disks start to move and misalign. At a 90-degree sitting position, this movement was most prominent. The disks were least moved when subjects were sitting back at a 135-degree sitting position.


"We have to do something that is similar to the lying position," Bashir told LiveScience. Lying down in a relaxed position with your knees slightly bent is the best position that a person can be in, because it doesn't cause any stress on the ligaments, the thigh muscles as well as on the back.


Sitting on a chair that provides proper support, such as a slightly tilted back car seat, can mimic the relaxed supine position. Slouching caused a reduction in the spinal height which means that there was high rate of wear and tear in the lowest two spinal levels.


"This may be all that is necessary to prevent back pain, rather than trying to cure pain that has occurred over the long term due to bad postures," Bashir said.


The study was detailed today at the annual meeting of the Radiological Society of North America (RSNA).

The Pain Truth: How and Why We Hurt
Surprising Source of Chronic Pain Discovered
Golfers with Pain are Weaker, Study Finds
Chronic Pain Shrinks People's Brains
Why Women Feel More Pain
Body Quiz: The Parts List
Original Story: New Advice: Don't Sit Up Straight

Visit LiveScience.com for more daily news, views and scientific inquiry with an original, provocative point of view. LiveScience reports amazing, real world breakthroughs, made simple and stimulating for people on the go. Check out our collection of Science, Animal and Dinosaur Pictures, Science Videos, Hot Topics, Trivia, Top 10s, Voting, Amazing Images, Reader Favorites, and more. Get cool gadgets at the new LiveScience Store, sign up for our free daily email newsletter and check out our RSS feeds today!

Sara Goudarzi
LiveScience Staff Writer