Magill R. A., Waters W. F., Bray G. A., Volaufova J., Smith S. R., Lieberman H. R., McNevin N., Ryan D. H.
Nutritional neuroscience, 2003
Abstract
Cognitive and motor performance are critical in many circumstances and are impaired by sleep deprivation. We administered placebo, tyrosine 150 mg/kg, caffeine 300 mg/70 kg, phentermine 37.5 mg and D-amphetamine 20 mg at 15.30 h following overnight sleep deprivation and compare their effects on cognitive and motor performance in healthy young men. Tests of visual scanning, running memory, logical reasoning, mathematical processing, the Stroop task, four-choice serial reaction time, time wall take, pursuit tracking, visual vigilance, Trails (B) task and long-term memory were evaluated at standardized intervals before, during and after sleep deprivation and drugs. Performance decrements with sleep deprivation occurred in visual scanning, running memory, logical reasoning, mathematical processing, the Stroop test, the time wall test, tracking and visual vigilance. Interestingly, with sleep deprivation some tests improved and others did not deteriorate. Improvements with medication following sleep deprivation were seen in running memory, logical reasoning, mathematical processing, tracking and visual vigilance. Although less effective than D-amphetamine, tyrosine improved performance on several tests. We conclude that all drugs tested improved at least some aspects of cognitive and motor performance after sleep deprivation. As a naturally occurring amino acid, and thus amenable to nutritional strategies, tyrosine may deserve further testing.
| PMID: | 12887140 |
|---|---|
| Category: | Brain / Mental Clarity |
The best supplements with Tyrosine in Brain / Mental Clarity category:
- L-Tyrosine, Extra Strength, 750 mg, 90 Veg Capsules (Now Foods) - L-Tyrosine is a conditionally indispensable amino acid required for the production of the neurotransmitters dopamine, adrenaline, and noradrenaline, as well as for the skin pigment, melanin. It contains among others: Tyrosine.
- L-Tyrosine, 500 mg, 120 Capsules (Now Foods) - L-Tyrosine is a conditionally indispensable amino acid required for the production of the neurotransmitters dopamine, adrenaline, and noradrenaline, as well as for the skin pigment, melanin. It contains among others: Tyrosine.
- NooCube - NooCube is a synergistic blend of nootropics which helps support and enhance your focus, mental speed and memory. It contains among others: Tyrosine.
- Brain Pill - „An amazing new product that supports your brain health and has the potential to change your life returning laser-sharp mental clarity” - Dr Dave David, a surgeon and physician for more than 37 years. It contains among others: Tyrosine.
Articles similar to "Effects of tyrosine, phentermine, caffeine D-amphetamine, and placebo on cognitive and motor performance deficits during sleep deprivation."
- The significance of Tyrosine for Brain / Mental Clarity: Tyrosine promotes cognitive flexibility: evidence from proactive vs. reactive control during task switching performance. (Tyrosine (TYR), an amino acid found in various foods, has been shown to increase dopamine (DA) levels in the brain...)
- The role of Tyrosine in Brain / Mental Clarity: Influence of nutritional tyrosine on cognition and functional connectivity in healthy old humans. (Tyrosine is precursor for monoamine neurotransmitters such as dopamine (DA), which is one of the key neurotransmitters in the frontostriatal network and of crucial relevance for mental disorders...)
- The impact of Tyrosine on Brain / Mental Clarity: Working memory reloaded: tyrosine repletes updating in the N-back task. (In this study we tested the idea that the food supplement l-Tyrosine (TYR) repletes resources required for cognitive-control operations...)
- The role of Tyrosine in Brain / Mental Clarity: Treatment with tyrosine, a neurotransmitter precursor, reduces environmental stress in humans. (Acutely stressful situations can disrupt behavior and deplete brain norepinephrine and dopamine, catecholaminergic neurotransmitters...)
Previous article
Working memory reloaded: tyrosine repletes updating in the N-back task.
Next article
Treatment with tyrosine, a neurotransmitter precursor, reduces environmental stress in humans.