Yet Another Study Finds That Cannabis Use Is Not Independently Linked With IQ Decline

Marijuana researchCannabis use by teens is not independently linked with adverse changes in intelligence quotient or executive functioning, according to longitudinal data published online ahead of print in the journal Addiction.

A team of investigators from the United States and the United Kingdom evaluated whether marijuana use is directly associated with changes over time in neuropsychological performance in a nationally representative cohort of adolescent twins. Authors reported that “family background factors,” but not the use of cannabis negatively impacted adolescents’ cognitive performance.

They wrote: “[W]e found that youth who used cannabis … had lower IQ at age 18, but there was little evidence that cannabis use was associated with IQ decline from age 12 to 18. Moreover, although cannabis use was associated with lower IQ and poorer executive functions at age 18, these associations were generally not apparent within pairs of twins from the same family, suggesting that family background factors explain why adolescents who use cannabis perform worse on IQ and executive function tests.”

Investigators concluded, “Short-term cannabis use in adolescence does not appear to cause IQ decline or impair executive functions, even when cannabis use reaches the level of dependence.”

Their findings are consistent with those of several other studies – including those here, here, here, and here – finding that cannabis use alone during adolescence does not appear to have a significant, direct adverse effect on intelligence quotient.

widely publicized and still often cited New Zealand study published in 2012 in The Proceedings of the National Academy of Sciences reported that the persistent use of cannabis from adolescence to adulthood was associated with slightly lower IQ by age 38. However, a follow up review of the data published later in the same journal suggested that the observed changes were likely due to socioeconomic differences, not the subjects’ use of cannabis. A later study by the initial paper’s lead investigator further reported that the effects of persistent adolescent cannabis use on academic performance are “non-significant after controlling for persistent alcohol and tobacco use.”

San Francisco Medical Marijuana Doctor Says Cannabis Offers Numerous Benefits Beyond Treating Symptoms


San Francisco, CA (Vocus/PRWEB) January 22, 2011

Greenway Medical Marijuana Doctors advise that in addition to treating symptoms, medical cannabis helps patients focus; increases productivity, creativity, and awareness; can boost physical performance during exercise; and has anti-aging, anti-inflammatory, cardio- and neuro-protective properties.

?Cannabis is a complex medication with a spectrum of benefits.? said Dr. Arif Khan. ?Safe therapeutic use requires selecting strains (Indica v. Sativa) and moderating dosage to address each patient?s medical condition.?

Many patients are unaware that cannabis enhances their lives as well as controls the symptoms of their illnesses. Taken properly, cannabis helps them focus, plus increases their productivity, creativity, and awareness. Patients often find that their social interactions are more meaningful with cannabis: it makes people pleasant and adds to one’s emotional intelligence.

Some of Greenway?s patients also find that their physical output during a workout or exercise session is greatly augmented by cannabis. The amazing effect of a well-chosen Sativa (one that energizes in a good way without being “trippy”) increases endurance and physical performance.

Of course, the underlying anti-aging, anti-inflammatory, cardio- and neuro-protective properties of cannabis (in particular, the high Cannabidiol or CBD strains) are, in Greenway?s opinion, likely to add happy, fulfilling years to many people?s lifespan.

For more information about effective medical cannabis use, contact Greenway Medical Marijuana Physicians Evaluations at (415) 777-0157, drop by the clinic located at 393 Tehama Street in San Francisco, or visit their website at http://www.greenway420.com. Greenway?s fax number is (415) 777-0153.

About Greenway Medical Marijuana Physicians Evaluations

Greenway Medical Marijuana Physicians Evaluations is a downtown San Francisco medical marijuana clinic. Greenway provides efficient, low-cost medical evaluations to the qualifying public for medicinal marijuana accessibility. San Francisco medical marijuana doctor and director Dr. Arif Khan believes in providing a compassionate, non-judgmental and detailed evaluation of each patient?s medical problem. Based on his shared experience at Greenway, he formulates an individualized treatment plan which incorporates the different strains of cannabis, guiding the patient through the initial experience and ensuring that he or she gets the best possible treatment plan.

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Related Medical Marijuana Doctors Press Releases

Over 7% of Patients Cite Marijuana as Preferred Treatment Option


Philadelphia, PA (Vocus/PRWEB) April 19, 2011

Over 7% of online patient discussions about alternative treatments mention marijuana as an effective option, according to a new study released today by ListenLogic, a social media intelligence firm. Findings from the study show that ? from arthritis to ADHD and diabetes to depression ? patients discuss using marijuana to treat a wide variety of medical conditions.

?We all know that medical marijuana is currently being used to treat conditions such as neurogenic pain, movement disorders, and glaucoma,? said Mark Langsfeld, Founder & CEO of ListenLogic. ?However, in social media we?re seeing more patients discuss using marijuana as an effective treatment option across many therapeutic areas, including specific forms of epilepsy, arthritis, and even schizophrenia.?

The personal anonymity afforded by social media is allowing for new research to occur regarding alternative treatment options, as patients feel less inhibited to share how they?re treating certain conditions. In an ADHD study conducted last quarter, ListenLogic found that many ADHD and mood disorder patients were hiding their marijuana use from their doctor.

?We also see patients discussing how to access marijuana to treat their condition and seek advice from other online users regarding its legality,? said Vince Schiavone, co-founder & Chairman. ?That?s how desperate they are to experience relief from their conditions. And this comes up consistently across a wide variety of therapeutic areas.?

According to the study, 7.3% of patients across 12 therapeutic areas publicly cite marijuana as an alternative treatment option while 18% cite herbal medicine. Acupuncture is cited by 4.2% and aromatherapy by 1%. The study was based upon on analysis of over 30,000 online, patient-level conversations across different medical conditions within which alternative treatments were mentioned.

To view the complete findings of the study ?Online Patients: Alternative Treatment Options?, please visit http://www.listenlogic.com/onlinepatients.

About ListenLogic

ListenLogic is a leading social media intelligence and analytics company that helps Global 1000 companies manage their reputation, engage with customers and drive innovation. ListenLogic?s Social Listening Intelligence Center (SLIC) provides enterprises with real-time listening and response to manage the daily corporate threats and outreach opportunities that emerge from social media. ListenLogic?s Consumer Insight solutions deliver deep understanding of consumer mindsets to drive product and marketing innovation. ListenLogic Health, a dedicated help division, specializes in providing social media intelligence to pharmaceutical, health and wellness companies. ListenLogic is headquartered outside of Philadelphia, PA and has offices in San Jose, CA. For further information, visit http://www.listenlogic.com | http://www.listenlogic.com/blog, or http://twitter.com/listenlogic.

Media Contact:

Chris Karnes

For ListenLogic

ckarnes(at)listenlogic(dot)com

267.544.9647

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More Medical Marijuana Doctors Press Releases

Latest Media Buzz Regarding Pot’s Potential Impact On IQ Misses The Bigger Issue

The mainstream press has been abuzz in recent days regarding the findings of a recent study suggesting that early-onset, persistent cannabis exposure by those under age 18 could potentially pose adverse effects on intelligence quotient.

Yet, absent from the media’s discussion of the study — a discussion that has even included some fairly critical reviews of the study’s methodology (See here and here for just two examples.) — is any talk of the role that marijuana prohibition plays in inadvertently steering young people toward cannabis, an issue I address in depth in a column published today and excerpted below:

Pot & IQ: A Flawed Debate
via hightimes.com

[excerpt] Even if one is to accept the study’s findings at face value, it’s hard to see how concerns regarding the potential impact of cannabis on the developing adolescent brain are any way a persuasive argument in support of present day marijuana prohibition. After all, virtually no one wants kids as young as 12 or 13 years of age consuming a mood-altering substance like cannabis. Yet, under cannabis criminalization – a policy that prohibits its use for people of all ages and compels all consumers to acquire the product on the black market instead of from licensed businesses – teens are more likely to have easy access to pot, not less.

… Specifically, a June 2012 study by the Centers for Disease Control reported that more teens are smoking pot than cigarettes.

Not so coincidentally, teens’ declining use of cigarettes has run parallel to increased state and federal efforts to penalize those licensed businesses that improperly sell to minors and to educate the public about the health risks associated with tobacco. Ditto for booze.

In short, it’s legalization, regulation, and public education – coupled with the imposition and enforcement of appropriate age restrictions – that most effectively keeps mind-altering substances out of the hands of children and reduces the likelihood of their abuse.

Isn’t it about time we took this same approach for pot?

You can read the full essay and comment on it here.

Adolescent pot use leaves lasting mental deficits; Developing brain susceptible to lasting damage from exposure to marijuana

The persistent, dependent use of marijuana before age 18 has been shown to cause lasting harm to a person’s intelligence, attention and memory, according to an international research team.

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