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Related Concept Videos

Working Memory01:24

Working Memory

Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this information.
Attention-Deficit/Hyperactivity Disorder01:30

Attention-Deficit/Hyperactivity Disorder

Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.
Drugs Affecting Neurotransmitter Synthesis01:29

Drugs Affecting Neurotransmitter Synthesis

Drugs affecting neurotransmitter synthesis can impact the adrenergic neuron and the synthesis of neurotransmitters. For example, α-methyltyrosine and carbidopa target specific enzymes involved in catecholamine synthesis. α-methyltyrosine inhibits the enzyme tyrosine hydroxylase, which converts tyrosine into dopamine. By blocking this enzyme, α-methyltyrosine reduces dopamine production and other catecholamines. Carbidopa, on the other hand, inhibits the enzyme dopa decarboxylase, which converts...

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Related Experiment Video

Updated: Jun 2, 2026

Identification of Dopamine D1-Alpha Receptor Within Rodent Nucleus Accumbens by an Innovative RNA In Situ Detection Technology
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Identification of Dopamine D1-Alpha Receptor Within Rodent Nucleus Accumbens by an Innovative RNA In Situ Detection Technology

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Inverted-U-shaped dopamine actions on human working memory and cognitive control.

Roshan Cools1, Mark D'Esposito

  • 1Department of Psychiatry, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands.

Biological Psychiatry
|May 3, 2011
PubMed
Summary

Brain dopamine plays a key role in cognitive control and working memory. Dopamine levels influence cognitive flexibility and stability, with optimal levels varying by individual and brain region.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Brain dopamine (DA) is linked to cognitive control, including working memory.
  • Variability in dopaminergic drug responses complicates understanding DA's precise role in cognition.

Purpose of the Study:

  • To review evidence explaining the variability in dopamine's effects on cognitive control.
  • To elucidate the factors influencing dopamine's impact on cognitive functions.

Main Methods:

  • Review of studies involving experimental animals, healthy humans, and Parkinson's disease patients.
  • Analysis of factors contributing to individual and behavioral variability in dopamine response.

Main Results:

  • An optimal dopamine level exists for cognitive function, necessitating consideration of baseline DA levels.
  • Cognitive control involves a balance between stability and flexibility, potentially involving distinct brain regions (prefrontal cortex and striatum).

Conclusions:

  • Dopamine manipulation can yield paradoxical effects on cognitive processes.
  • Understanding baseline and optimal dopamine levels in specific brain regions is crucial for predicting cognitive outcomes.