Thread: Caffeine

My radio station today:

"Recent studies show that while caffiene increases short term memory realiablity, it can seal off access to other parts of the brain."

i am currently not allowed to have caffiene. iw as addicted to it...but then i started getting migranes because of it and so my doctor told me i wasn't allowed to have it for at least three years. man did i go threw some withdrawls.....

Never tried. No going to. Last think I need to to me insomnatic. ANd you'll probably get it to. Be kinda like this- http://www.madblast.com/view.cfm?type=FunF...sh&display=3054


note: This was not my work this is only a representation of what would happen. If I offend anyone i'm sorry.

man i love caffeine, i really do. but my mom started buying me Non-caffeine pops and stuff and man that was hard to do.

Hey, you never know untill you try, right? So good luck man, let us know how your efforts go, I'd be interested to see what you come up with.

Did some research on adenosine and caffeine..

As I stated in my tutorial of the Phsyiology of Sleep, there are two main signals that control the cicruitry of sleep. First, there is homeostasis, or the body's need to seek a natural equilibrium. There is an intrinsic need for a certain amount of sleep each day. The mechanism for accumulating sleep need is not yet clear. Some people think this chemical called adenosine may accumulate in the brain during prolonged wakefulness, and that i may drive sleep homeostasis. Caffeine acts as an adenosine blocker.

The effects of caffeine on human information processing have been well reviewed.* A large number of studies has been performed on human subjects (Estler, 1976; Daly et al., 1993). As for most effects of caffeine, the dose-response curve is U-shapeddoses of 500 mg causing a decrease in performance although lower doses have positive effects (Kaplan et al., 1997). Despite this, increases in caffeine consumption over an already high normal level (400-1000 mg/day) did not impair performance even in a complex setting (Streufert et al., 1997). Revelle and coworkers (1980) showed a complex interaction between the effects of caffeine on performance and parameters such as personality and time of day. Thus, the effects of caffeine are related to a level of arousal (Anderson and Revelle, 1982) and largely follow the so-called Yerkes-Dodson law that postulates that the relationship between arousal and performance follows an inverted U-shape curve. An increase in arousal improves performance of tasks where relatively few sources of information have to be monitored, particularly under conditions when the need for selective attention is stressed by time pressure. When, on the other hand, multiple sources of information or working memory have to be used, an increase in arousal and attention selectivity has no apparent beneficial effect on performance, which may consequently even decrease (see Kenemans and Lorist, 1995). Thus, it was concluded that caffeine increases cortical activation, increases the rate at which information about the stimulus accumulates, increases selectivity particularly with regard to further processing of the primary attribute, and speeds up motor processes via central and/or peripheral mechanisms (Kenemans and Lorist, 1995). In a study where caffeine significantly improved performance in a vigilance test, caffeine neither increased nor decreased the mood changes that occur after such stressful tasks (Temple et al., 1997).

Therefore it can probably be concluded that caffeine in doses that correspond to a few cups of coffee "improves behavioral routine and speed rather than cognitive functions" (Battig et al., 1984). This probably indicates that many animal models test for psychomotor function rather than cognition, but it is of course very different from claiming that "caffeine bestows little if any benefit on... psychomotor performance" (James, 1991). The small benefits that can be shown may be considered of value by some caffeine users, and it can be expected from the above considerations that, particularly, individuals with a low level of arousal (high scores on the impulsivity subscale of Eysenck) should experience such a beneficial effect. Indeed, such individuals appear to consume more caffeine (Rogers et al., 1995). Conversely, in situations with a high level of stress, caffeine might prove detrimental, but there is no evidence that this is the case (Smith et al., 1997).

In order to perform adequately, an animal (or human) must be able to filter out irrelevant sensory input. A deficiency in this regard is believed to be a characteristic of schizophrenic subjects (Koch and Hauber, 1998). Filtering ability can be assessed by so called prepulse inhibition of the acoustic startle response (see Hauber and Koch, 1997; Koch and Hauber, 1998). Such prepulse inhibition can be attenuated by systemic or intra-accumbens administration of apomorphine, and this is counteracted by an injection of the adenosine A2A agonist CGS 21680 into the nucleus accumbens (Hauber and Koch, 1997). These results suggest that caffeine might, via an action on adenosine receptors, influence sensorimotor gating and, in this way, performance.

* van der Stelt and Snel, 1993

Hope I have been enlightening. (If I didn't help elucidate a certain aspect, please ask away!)

I think caffeine could be helpful, IF you can get an extra hour of sleep in the morning.

A late night dose of caffeine should offset your delta sleep a little bit. Your body should compensate by having a prolonged delta later in the night and then have to balance it out with a prolonged REM period in the late morning.

It's worth a try!

I say a lot of crap that no one reads, don't I?

Sorry, I fell asleep reading that.

(kidding!)

O'nus...dear, there is a difference between reading something and comprehending it.

I read that O'nus and found it, to a degree, enlightening. I was thinking about a single or double-shot coffee in the morning so that way some of the less desirable effects (ie. inability to fall asleep) may wear off. Do you think that since caffeine inhibits adenosine that there might be a surplus when sleeping? I don't know much about bodily chemicals (I suck at Biology) so I'm not sure. I'll see what happens, tho.

Thanks.

-Amé

Originally posted by death dreamer
O'nus...dear, there is a difference between reading something and comprehending it.

SHELTON... ...CREEPY. buts thats write. there were some really big words in there that i didn't get but other than that it was kool

Originally posted by Shadows+--><div class='quotetop'>QUOTE(Shadows)</div>

<!--QuoteBegin-death dreamer

O'nus...dear, there is a difference between reading something and comprehending it.

SHELTON... ...CREEPY. buts thats write. there were some really big words in there that i didn't get but other than that it was kool[/b]

actually sadly enough i got that off jen...but she more than likly got it off of him. but seriously O'nus. we all can see that your smart so please next time you feel the need to do that....use smaller word...please

yes i think a few more people would understand what ur saying. just remember some of us are still in high school and are hardly passing that (ex: me)

i just went past it, to me your post read: info on caffeine onus is smarter than the rest of us, especially at useless things like caffeine info.
*goes on to read/skim other posts*

hey, its late what am i to do?

caffeine doesnt effect me, once i almost finnished a 24 pack at an all-nighter nothing happened but my kidneys REALLY hurt after i got to bed at around lunch time the next day

Originally posted by O'nus
I say a lot of crap that no one reads, don't I?

lol.. yes.. but not crap.
Think of it this way, its still useful when researching something
eg. if someone searches on caffiene one day

And of course its pretty useful for yourself
Besides. I read it this time. And its very good. And it seems to fit what I find it does to me. More selective in my thoughts for example.

Your posts are normally just long and hard... no, dont get sexual and off topic now, guys
Maybe have a 'simplified summary' at the top, and then the detail? or vice versa... just an idea ...

If anyone would like to read the whole paper O'nus' post was from it's avaliable at the below address, page 19.

http://pharmrev.aspetjournals.org/cgi/repr...int/51/1/83.pdf

Originally posted by Krum
If anyone would like to read the whole paper O'nus' post was from it's avaliable at the below address, page 19.

http://pharmrev.aspetjournals.org/cg...nt/51/1/83.pdf

Ohhh yes! It's on the net! *Book marks page*

Do you also subscribe to the Journal of Neuroscience?

Thankee sir.