Cognition Enhancer Research

oschobero writes to tell us the Economist has a look at pharmaceutical research as it applies to cognition enhancers. While the research is obviously focused on things like Alzheimer's, Parkinson's, and schizophrenia, the resulting drugs may also have a benefit to healthy minds. "Provigil and Ritalin really do enhance cognition in healthy people. Provigil, for example, adds the ability to remember an extra digit or so to an individual's working memory (most people can hold seven random digits in their memory, but have difficulty with eight). It also improves people's performance in tests of their ability to plan. Because of such positive effects on normal people, says the report, there is growing use of these drugs to stave off fatigue, help shift-workers, boost exam performance and aid recovery from the effects of long-distance flights."

Comments

Re:Oh, great.....

[Martin Blank]

There's a gigantic difference between drugs like amphetamine and methamphetamine and drugs like modafinil (Provigil). They work in different ways, and decades of use by narcoleptic patients shows no significant addictiveness for modafinil (or its predecessor adrafinil, which metabolizes to modafinil). Amphetamine and methamphetamine have strong addictive potential as well as significant side-effects, including jumpiness, jitters, and irritability that are not found in modafinil. (That's not to say there are no side-effects to modafinil, but they are rare or uncommon.)

Digits and Nootropics

[DynaSoar]

To first address the comments regarding number of digits in working memory: the "magic number" is 7 plus or minus 2, the variance being context dependent. To hold more items in memory, which people obviously do, they employ "chunking", or grouping them together and remembering the chunks in the necessary sequence. The 7 digit phone number was based on the original 7 digit idea, the grouping of area code XXX, prefix YYY, and last 4 ZZZZ was based on chunking. Since this chunking is a major action of attention and memory, simply adding a single digit to a single chunk is a weird way to claim improvement.

Yet once again an article on cognition enhancement fails to note its origins and long standing history. The first nootropic, hydergine http://en.wikipedia.org/wiki/Hydergine , was developed by Albert Hoffmann of Sandoz. While he is best known for LSD, his "problem child", he considered hydergine to be his most important discovery. He credited his longentivity (he died recently at age 102) to using hydergine regularly.

Re:Withdrawal and Other Downsides?

[grammar fascist]

I can answer these questions on the average for Adderall and Dexedrine (dextroamphetamines) and Ritalin (methylphenidate).

What happens to your cognition once you stop taking it, after you've gotten used to taking it? Do you get a tolerance, so you not only need higher doses for a smarts boost, but you also just return to your base performance after getting used to it?

Tolerance is rarely an issue with the low doses given to treat ADHD. A couple of back-of-the-envelope calculations suggest that an average dose of Adderall (20mg) is about 1/10 an average "first hit" of meth or cocaine. Prescription medications are also designed to metabolize much more slowly than recreational drugs.

Tolerance mainly results from neurons being overexcited and altering receptor sites in response. (This is in fact how caffeine tolerance develops.) People who take these medications under a doctor's care are generally not overstimulated. In fact, with ADHD, because medication corrects understimulation it's usually not an issue at all.

I would be more worried about tolerance if the general population started on them, though.

What's the withdrawal like?

Usually a little mentally fuzzier than before medication and maybe a bit crankier. It lasts about half an hour to an hour. People report that Ritalin and Dexedrine have "rougher edges" than Adderall, which makes sense since Adderall is a mixture of amphetamine salts that metabolize at different rates.

I suspect that maybe the many kids given Ritalin while growing up learn to depend on it for their baseline. When they outgrow their "hyperactivity" (AKA "childhood"), they quit the drugs, and sink into an unfamiliar dullness in which they can't think at their previous baseline without the artificial stimulation.

If they don't outgrow ADHD and they need medication to function, they shouldn't stop.

However, often the medication does have a lasting effect, though not one that people with "OMG DRUGGIES!!!" in mind would predict. It can train your mind to mimic the patterns it gets used to while on medication. People will often lower their dosage over time, and some quit altogether. I'm not aware of anyone needing more until they're a prescription crack-head. Both anecdotal evidence and the literature (peer-reviewed studies) support this.

It also tends to train behavior. While on medication, functional behavior is much easier, and people who learn to function effectively while on medication have an easier time off of it than they did before medication.

Again, I wouldn't apply this to the general population, just to people who use medication to treat neurological problems.

And how much do they just get burned out from the steady drugging?

They only do if the dose is too high. The beautiful thing about stimulants at these dosages is that their cognitive effects don't last into the next day, except for the gradual effects I mentioned.