More sex, better brain function

More frequent sexual activity has been linked to improved brain function in older adults, according to a study by the universities of Coventry and Oxford.

Source: AARP

Researchers found that people who engaged in more regular sexual activity scored higher on tests that measured their verbal fluency and their ability to visually perceive objects and the spaces between them.

The study, published today in The Journals of Gerontology, Series B: Psychological and Social Sciences, involved 73 people aged between 50 and 83.

Participants filled in a questionnaire on how often, on average, they had engaged in sexual activity over the past 12 months -- whether that was never, monthly or weekly -- as well as answering questions about their general health and lifestyle.

The 28 men and 45 women also took part in a standardized test, which is typically used to measure different patterns of brain function in older adults, focusing on attention, memory, fluency, language and visuospatial ability.

Learn about your brain in easy-to-understand language.

This included verbal fluency tests in which participants had 60 seconds to name as many animals as possible, and then to say as many words beginning with F as they could -- tests which reflect higher cognitive abilities.

They also took part in tests to determine their visuospatial ability which included copying a complex design and drawing a clock face from memory.

It was these two sets of tests where participants who engaged in weekly sexual activity scored the most highly, with the verbal fluency tests showing the strongest effect.

The results suggested that frequency of sexual activity was not linked to attention, memory or language. In these tests, the participants performed just as well regardless of whether they reported weekly, monthly or no sexual activity.

This study expanded on previous research from 2016, which found that older adults who were sexually active scored higher on cognitive tests than those who were not sexually active.

But this time the research looked more specifically at the impact of the frequency of sexual activity (i.e. does it make a difference how often you engage in sexual activity) and also used a broader range of tests to investigate different areas of cognitive function.

The academics say further research could look at how biological elements, such as dopamine and oxytocin, could influence the relationship between sexual activity and brain function to give a fuller explanation of their findings.

Lead researcher Dr Hayley Wright, from Coventry University's Centre for Research in Psychology, Behaviour and Achievement, said:

"We can only speculate whether this is driven by social or physical elements -- but an area we would like to research further is the biological mechanisms that may influence this.

"Every time we do another piece of research we are getting a little bit closer to understanding why this association exists at all, what the underlying mechanisms are, and whether there is a 'cause and effect' relationship between sexual activity and cognitive function in older people.

"People don't like to think that older people have sex -- but we need to challenge this conception at a societal level and look at what impact sexual activity can have on those aged 50 and over, beyond the known effects on sexual health and general wellbeing."

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Story Source:

Materials provided by Coventry University.

Regular marijuana use linked to more sex, study finds

Sex...it happens in the brain first.

Despite concerns among physicians and scientists that frequent marijuana use may impair sexual desire or performance, the opposite appears more likely to be the case, new research indicates.

FULL STORY

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The jury's still out on rock 'n' roll. But the link between sex and at least one drug, marijuana, has been confirmed.

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A study by investigators at the Stanford University School of Medicine indicates that, despite concerns among physicians and scientists that frequent marijuana use may impair sexual desire or performance, the opposite appears more likely to be the case.

The findings, to be published online Oct. 27 in the Journal of Sexual Medicine, are based on an analysis of more than 50,000 Americans ages 25-45. And they're unambiguous.

"Frequent marijuana use doesn't seem to impair sexual motivation or performance. If anything, it's associated with increased coital frequency," said the study's senior author, Michael Eisenberg, MD, assistant professor of urology. The lead author is Andrew Sun, MD, a resident in urology.

Hint of a causal connection
The study does not establish a causal connection between marijuana use and sexual activity, Eisenberg noted. But the results hint at it, he added. "The overall trend we saw applied to people of both sexes and all races, ages, education levels, income groups and religions, every health status, whether they were married or single and whether or not they had kids."

The study is the first to examine the relationship between marijuana use and frequency of sexual intercourse at the population level in the United States.

"Marijuana use is very common, but its large-scale use and association with sexual frequency hasn't been studied much in a scientific way," Eisenberg said.

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According to the National Institute on Drug Abuse, more than 20 million adult Americans are current marijuana users. With the drug's legalization for medical or recreational use in 29 states, that number is climbing. But despite marijuana's growing status as a recreational drug, its status as a procreational drug remains ambiguous: On one hand, there are reports of erectile dysfunction in heavy users, and rigorous studies have found reduced sperm counts in men who smoke it; on the other hand, experiments conducted in animal models and humans indicate that marijuana stimulates activity in brain regions involved in sexual arousal and activity.

Looking at survey responses
To arrive at an accurate determination of marijuana's effect on intercourse frequency, Eisenberg and Sun turned to the National Survey of Family Growth, sponsored by the federal Centers for Disease Control and Prevention. The survey, which provides data pertaining to family structures, sexual practices and childbearing, reflects the overall demographic features of the U.S. population.

Originally conducted at regular intervals, the survey is now carried out on an annual basis. It explicitly queries respondents on how many times they've had intercourse with a member of the opposite sex in the past four weeks, and how frequently they've smoked marijuana over the past 12 months.

The investigators compiled answers to those questions for all years since 2002, when the survey first began collecting data on men as well as women. They included data from respondents ages 25-45 and excluded a small percentage (fewer than 3 percent) of respondents who had failed to answer one or more relevant questions.

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In all, Eisenberg and Sun obtained data on 28,176 women averaging 29.9 years of age and 22,943 men whose average age was 29.5. They assessed these individuals' self-reported patterns of marijuana use over the previous year and their self-reported frequency of heterosexual intercourse over the previous four weeks.

Some 24.5 percent of men and 14.5 percent of women in the analysis reported having used marijuana, and there was a positive association between the frequency of marijuana use and the frequency of sexual intercourse. This relationship applied to both sexes: Women denying marijuana use in the past year, for example, had sex on average 6.0 times during the previous four weeks, whereas that number was 7.1 for daily pot users. Among men, the corresponding figure was 5.6 for nonusers and 6.9 for daily users.

In other words, pot users are having about 20 percent more sex than pot abstainers, Eisenberg noted.

Positive association is universal
Moreover, Eisenberg said, the positive association between marijuana use and coital frequency was independent of demographic, health, marital or parental status.

In addition, the trend remained even after accounting for subjects' use of other drugs, such as cocaine or alcohol. This, Eisenberg said, suggests that marijuana's positive correlation with sexual activity doesn't merely reflect some general tendency of less-inhibited types, who may be more inclined to use drugs, to also be more likely to have sex. In addition, coital frequency rose steadily with increasing marijuana use, a dose-dependent relationship supporting a possible active role for marijuana in fostering sexual activity.

Nevertheless, Eisenberg cautioned, the study shouldn't be misinterpreted as having proven a causal link. "It doesn't say if you smoke more marijuana, you'll have more sex," he said.

Source:

Stanford University Medical Center