Effects of selective serotonin reuptake and dual serotonergic-noradrenergic reuptake treatments on memory and mental processing speed in patients with major depressive disorder.
Journal of Psychiatr. Rev
Jan. 5, 2009
Patients with major depressive disorder (MDD) usually suffer from altered cognitive functions of episodic memory, working memory, mental processing speed and motor response. Diverse studies suggest that different antidepressant agents may improve cognitive functions in patients with MDD. The aim of this work is to study the effects of serotonergic reuptake inhibitors (SSRIs) and serotonergic-noradrenergic reuptake inhibitors (SNRIs) treatments to improve the performance on memory tasks and mental processing speed in MDD. Seventy-three subjects meeting criteria for major depressive disorder were assessed with the Hamilton depression rating scale and a neuropsychological battery. The subjects were medicated with escitalopram (n=36) or duloxetine (n=37) for 24 weeks. At the end of the trial, the subjects were assessed again with the same neuropsychological battery used prior to the treatment. Both treatments improved importantly the episodic memory and to a lesser extent, working memory, mental processing speed and motor performance. Our results suggest that cognition is partially independent from improvement in clinical symptoms. Both groups achieved remission rates in the HAM-D-17 after 24 weeks of treatment, but SNRI was superior to SSRI at improving episodic and working memory. Our work indicates that the superiority of SNRI over the SSRI at episodic memory improvement is clinically relevant.
Which antidpressant are you taking?
I first became interested in this question while researching another completely unrelated article: the importance of BCAAs for athletes. One of the leading theories for the phenomenon called central fatigue is the increased production of serotonin in the brain caused by the increased availability of tryptophan, a serotonin precursor.
That's when I light bulb went off. If an increased production of serotonin is one of the leading theories behind central fatigue, how are the selective serotonin reuptake inhibitors affecting mental performance?
The above study sheds a small ray of light on the answer. However, there's still a long way to go.
I'm almost finished with the move. All that is left is painting the walls and laying the carpet.
I'm not for sure if I've posted this study, but it should be of interest to you. I'm betting the house that l-theanine will be a major ingredient in the energy drinks during the next 2 years.
The Effects of L: -theanine on Alpha-Band Oscillatory Brain Activity During a Visuo-Spatial Attention Task.
Brain Top. Oct 2008
Gomez-Ramirez M, Kelly SP, Montesi JL, Foxe JJ.
Background/Objectives Ingestion of the non-proteinic amino acid L: -theanine (gamma-glutamylethylamide) has been shown to influence oscillatory brain activity in the alpha band (8-14 Hz) in humans during resting electroencephalographic (EEG) recordings and also during cognitive task performance. We have previously shown that ingestion of a 250-mg dose of L: -theanine significantly reduced tonic (background) alpha power during a demanding intersensory (auditory-visual) attentional cueing task. Further, cue-related phasic changes in alpha power, indexing the shorter-term anticipatory biasing of attention between modalities, were stronger on L: -theanine compared to placebo. This form of cue-contingent phasic alpha activity is also known to index attentional biasing within visual space. Specifically, when a relevant location is pre-cued, anticipatory alpha power increases contralateral to the location to be ignored. Here we investigate whether the effects of L: -theanine on tonic and phasic alpha activity, found previously during intersensory attentional deployment, occur also during a visuospatial task. Subjects/Methods 168-channel EEG data were recorded from thirteen neurologically normal individuals while engaged in a highly demanding visuo-spatial attention task. Participants underwent testing on two separate days, ingesting either a 250-mg colorless and tasteless solution of L: -theanine mixed with water, or a water-based solution placebo on each day in counterbalanced order. We compared the alpha-band activity when subjects ingested L: -Theanine vs. Placebo. Results We found a significant reduction in tonic alpha for the L: -theanine treatment compared to placebo, which was accompanied by a shift in scalp topography, indicative of treatment-related changes in the neural generators of oscillatory alpha activity. However, L: -theanine did not measurably affect cue-related anticipatory alpha effects. Conclusions This pattern of results implies that L: -theanine plays a more general role in attentional processing, facilitating longer-lasting processes responsible for sustaining attention across the timeframe of a difficult task, rather than affecting specific moment-to-moment phasic deployment processes.
The aim of the study was to assess the efficacy of the standardised extract SHR-5 of roots of RHODIOLA ROSEA L. in the treatment of individuals suffering from stress-related fatigue. The phase III clinical trial took the form of a randomised, double-blind, placebo-controlled study with parallel groups. Participants, males and females aged between 20 and 55 years, were selected according to the Swedish National Board of Health and Welfare diagnostic criteria for fatigue syndrome. A total of 60 individuals were randomised into two groups, one ( N = 30) of which received four tablets daily of SHR-5 extract (576 mg extract/day), while a second ( N = 30) received four placebo tablets daily. The effects of the extract with respect to quality of life (SF-36 questionnaire), symptoms of fatigue (Pines' burnout scale), depression (Montgomery -Asberg depression rating scale - MADRS), attention (Conners' computerised continuous performance test II - CCPT II), and saliva cortisol response to awakening were assessed on day 1 and after 28 days of medication. Data were analysed by between-within analyses of variance. No serious side effects that could be attributed to the extract were reported. Significant post-treatment improvements were observed for both groups (placebo effect) in Pines' burnout scale, mental health (SF-36), and MADRS and in several CCPT II indices of attention, namely, omissions, commissions, and Hit RT SE. When the two groups were compared, however, significant effects of the SHR-5 extract in comparison with the placebo were observed in Pines' burnout scale and the CCPT II indices omissions, Hit RT SE, and variability. Pre- VERSUS post-treatment cortisol responses to awakening stress were significantly different in the treatment group compared with the control group. It is concluded that repeated administration of R. ROSEA extract SHR-5 exerts an anti-fatigue effect that increases mental performance, particularly the ability to concentrate, and decreases cortisol response to awakening stress in burnout patients with fatigue syndrome. CCCPT II:Conners' computerised continuous performance test II HPA:hypothalamic-pituitary-adrenal ICD:International Classification of Diseases MADRS:Montgomery-Asberg depression rating scale Qol:quality of life.
I wanted to give you a quick look. I'll talk a little bit more about it in my entry tomorrow.
I've already discussed at length the pitfalls of high glycemic carbohydrates and poker. In fact, I probably was picking on high glycemic carbohydrates a little too much. don't get me wrong though, they're still bad for poker. However, I'm going to switch gears in this entry.
With 2009 right around the corner, I'm sure many of you are thinking about your new year's resolution. If a low-carb diet is on your list, I highly suggest you pass on it if you plan on playing poker in 2009. It's probably even worse than high glycemic carbohydrates with regards to poker performance. Why you ask.....
First, remember that your brain uses 2/3 of the available glucose throughout the day. That glucose comes from carbohydrates. If you're not consuming enough carbs, your body will begin breaking down protein and fat, and turn them into glucose. This process is not nearly as efficient as breaking down carbs. Because of the lack of efficiency, mental tasks will be harder to perform, errors will become more commonplace, and mental fatigue will set in sooner. The harder the mental task, the more sensitive it is to blood glucose levels. Needless to say, poker is a pretty complex mental task.
Secondly, carbohydrates are needed in the production of serotonin. Serotonin is the neurotransmitter that is responsible for your mood and happiness.Almost every antidepressant in some way improves serotonin. If your low in serotonin, those tough losses will be so much worse.
Some also suggest that increasing your protein intake to compensate for the lack of carbs prevents some of the key amino acids (breakdown products of protein) from getting into the brain. Only so many amino acids can pass through the blood-brain barrier. If you increase your protein too much, it will dilute the amino acids that are important for neurotransmitter production. This has actually been documented for the amino acid tyrosine, which is important for energy production.
For those of you that are trying to outsmart the system, taking antidepressants will probably not solve the low levels of serotonin. This is just my hypothesis. Antidepressants work by inhibiting the reuptake of a particular neurotransmitter within the synapse. They do not increase the production. Thus, even though you're prolonging the time the neurotransmitter is in the synapse, you are not fixing the real problem: the decreased amount of neurotransmitters. Your band-aid will only work for so long.
So, if you're thinking low-carb diet, I highly recommend against. Those are two pretty convincing reasons not to.
It's pretty simple why. Your brain needs carbs. You need your brain for poker.
Get your grocery list ready. Put down that beer, hide those damn energy drinks, and rid your cabinets of potato chips, candy bars, cookies, and everything else you like to snack on during those poker tournaments. Not only are all of those things neurotoxic, but they’re also aiding in your quick exits from your tournaments.
Remember that drug-free commercial with the eggs and the frying pan? Yea, that’s what all of those things are slowly doing to your brain. You wouldn’t put water in your car’s gas tank, so why are you putting that trash in your body? Your nutrition may very well be holding you back from your true poker potential.
Don’t worry though. I’m about to write out a specific diet program for mental performance. It wasn’t created to get you sexy or healthy. It was created to improve your poker performance. You’ll not only have more mental energy, but you’ll be more focused, your memory will improve, and you’ll reduce that mental fog that always creeps up at different points throughout the day.
Let me warn you though. This is not the be-all, end-all diet. If you’ve read my previous article, you already know the principles from which I created this specific diet. Use those principles, and you can create your own mental performance diet regimen. You’ll also find some links at the end of this article that will help you with finding the right carbohydrates.
Now, let’s get to the diet plan:
Breakfast
Your body has been fasting for at least 7 hours. Thus, you’ve depleted all of your energy stores, especially your carbohydrate stores. That’s why breakfast is considered the most important meal of the day. It refuels the body from the 7-8 hour drought of sleep. It’s important that this meal contains the most carbohydrates of any of the meals throughout the day. You should still stick with low GI carbs, but you don’t have to be as picky. Just replenish your energy.
Whole eggs – raw or boiled
Blueberries and oatmeal (not that instant crap, real oats)
4-6 Fish Oil capsules
Pomegranate juice or Acai Berry Juice
Lunch
During lunch, you need to pay a little more attention to the quality of carbohydrates you eat. You want to make sure you’re getting all three major macronutrients.
Wild salmon or cod
Brown rice- small scoop
Celery with natural peanut butter
Green Tea
Dinner
Once again, it’s important to eat nutritious, clean foods here. This is your last meal before the big tournament. Make no mistakes here, or may end up costing you in the later rounds.
A source of lean protein – chicken breasts, grass-fed beef, fish again, etc
Spinach
Pick a fruit – apples, blueberries, strawberries, grapes, watermelon, honeydew, cantaloupe
Water, green tea, or one of the juices I spoke of earlier
Misc tips:
Snack choices
There it is. As I said earlier, if you learn the principles, you’ll be able to change the diet to your specific taste. As you can see, low GI carbs, omega 3 fatty acids, and all three major macronutrients are pretty much the foundation for any mental performance diet.
I just want to briefly discuss energy drinks. The only time I suggest using an energy drink is during the later rounds. If you use it too soon, you’ll crash. If you save it, you’ll play your strongest when it counts!
Let me know if you have a suggestion for a “brain food.”
“Give a man a fish; you have fed him for today. Teach a man to fish; and you have fed him for a lifetime”—Author unknown
It’s the big day. You’re nervous, yet excited. Over the last 24 hours, you’ve been strategizing. You know you’re prepared, but there’s always that self-doubt, that what-if. You’ve already played the hands a thousand times in your head. However, you know better than anyone that once the cards are dealt, anything can happen. You’ve made sure that you’ve done everything right. You’ve completed every pre-tournament ritual to the “T”. You fell asleep watching “Rounders”, sleeping exactly 8 hours and fifteen minutes. Your Ipod is loaded with your favorite adrenaline-pumping songs. The ballad from “Rocky” starts to play as you sit down at your computer. It’s time..
One hand into the tournament, and you’ve realized you’ve made a HUGE mistake. What did I eat today? What kind of food did I pack for this tournament? My energy is low. My brain seems a little foggy. My sharpness just isn’t there. I’m not seeing the cards like I usually do. Ahhhhh. A wasted tournament!
That’s what happens when you don’t pay attention to your diet. Pre-tournament nutrition is the key to peak mental performance. This just doesn’t include what you eat while you play. It includes everything you’ve eaten over the last 24 hours. Without it, you’re destined for failure. It’s the difference between an early exit and a sweet victory. Only fools ignore it.
This article was written for you. I’ve received many requests over the last 2 weeks about what poker players should eat the day of and during a tournament. It seems that some of you are beginning to see the light at the end of the tunnel, and realize how important your lifestyle is to your poker performance. You’ve specifically asked me to outline a detailed diet. I’ll do that. Just not in this post.
This post is even more important than a “detailed poker menu.” It’s going to explain the why’s behind my recommendations. After reading this, you won’t even need my poker menu. You’ll be able to make your own, one that specifically is made for you! What happens if I recommend a salmon one hour before the tournament begins, and all you have is peanut butter and jelly? This post will help you answer that question.
Now for my top three rules regarding nutrition and mental performance.
Rule 1- Blood sugar, blood sugar, blood sugar
Blood sugar levels will make or break you at the table. It is vital that you maintain a stable blood sugar. I guarantee that if you put your blood sugar on a rollercoaster by eating high glycemic, junk carbohydrates, your mental performance will suffer. Mental errors will be plentiful.Guaranteed!
Remember, your brain primarily relies on carbohydrates for energy. In addition, it cannot store carbohydrates for later use. Thus, it’s important that your blood supplies your brain with a steady source of carbohydrates. Numerous studies have shown that blood sugar fluctuations, extremely high and extremely low levels, impair mental performance. Over time, these fluctuations can lead to insulin resistance, which has been shown to negatively affect cognitive performance.
Don’t believe me?
“Furthermore, a period of intense cognitive processing leads to a measurable decrease in levels of peripherally measured blood glucose, which may be linked to increased neural energy expenditure.” – Journal of Physiology and Behavior, 2001
Our findings support the concept that good and stable cognitive performance is related to a balanced glucose metabolism and metabolic activation state."- British Journal of Nutrition, 2001
There was also a very good review article detailing a direct correlation between the difficulty of a mental task and its sensitivity to blood sugar levels. Thus, a hard mental task like poker is extremely sensitive to blood sugar levels, and carbohydrates become even more vital to poker performance. However, I cannot find it right at this moment.
Out of the three major macronutrients, carbs, protein, and fat, carbohydrates have the largest impact on cognitive performance. Over 50 clinical studies have shown a positive relationship between consumption of carbohydrates and improved mental performance. You must pay attention to what kind of carbohydrates you eat. Not all are created equal. They will have a major impact on your game.
Rule 2- Proper Hydration
Even the slightest bit of dehydration will impair your mental performance. You know that caffeine you’ve been consuming for breakfast, lunch, and dinner? It actually acts like a diuretic. Thus, you become even more at risk for dehydration.
When most people think of dehydration, they think of physical performance. However, mental performance is actually even more sensitive to your hydration status. During extreme cases of dehydration, it’s not the body that stops. It’s the brain telling your body to stop! Your brain will quit long before your body quits.
“Studies in healthy adults have shown that even mild dehydration impairs a number of important aspects of cognitive function such as concentration, alertness, and short-term memory.” – Nutritions Review, 2005
“During dehydration, there was a significant deterioration in total test solving time, minimum single task solving time, and total ballast time.”- Croation Medical Journal, 2006
Rule 3- Eat protein, fat, and carbohydrates
Each of the three macronutrients is critical to mental performance. They each have a distinctive role. Ignore one, and you’ll be sorry! It’s like playing with only one hole card!
“Energy intake from protein, carbohydrate, or fat can enhance memory independently of elevations in blood glucose. Each macronutrient may also exert unique effects on cognition.” – American Journal of Clinical Nutrition, 2001
“The results suggest that dietary protein rich in alpha-lactalbumin improves cognitive performance in stress-vulnerable subjects via increased brain tryptophan and serotonin activities.” – American Journal of Clinical Nutrition, 2002
“A protein-rich or balanced meal seems to result in better overall cognitive performance..” – Physiology and Behavior, 2002
“Protein ingestion resulted in better attention and efficiency of tasks concomitant with higher metabolic activation.” – British Journal of Nutrition, 2001
Thus, you can see the inadequacies of the typical energy drink. Sugar and caffeine are great. However, caffeine, protein, fat, and carbohydrates are far superior! For overall cognitive performance, your meals and snacks should contain all three macronutrients!
A poker tournament is a long, tedious mental task. It’s similar to a marathon, except it’s testing your mental muscle. Thus, you should approach it as one. Marathon runners have long understood the importance of proper prerace nutrition. In fact, they’ve almost became paranoid about it. For good reason though because it could make or break them. When you start paying strict attention to your diet, you’ll begin to start noticing a distinct difference in how you feel, how much energy you have, how you play, and how many mental errors you make. Start now!
Next week, I’ll give you my detailed “poker menu.”