Dopaminergic modulation of basal ganglia circuitry
Best insight from top research papers
Dopaminergic modulation plays a crucial role in the circuitry of the basal ganglia. It is involved in the initiation and execution of goal-directed movements and habits . The dopaminergic regulation occurs in various nuclei of the basal ganglia, including the subthalamo-nigral synapse . Dopamine receptors, specifically D2-like receptors, modulate the release of glutamate through calcium channels in this synapse . The basal ganglia, including the striatum and globus pallidus, are influenced by neuromodulators, such as dopamine, which affect the overall computing mechanism of the brain . Beta oscillatory activity, which is prevalent in the cortex and basal ganglia, is strongly coupled with dopamine tone . Modulating dopamine and serotonin within the basal ganglia can impact behavioral disorders associated with neuropsychiatric conditions like Parkinson's disease and Tourette's syndrome . Overall, dopaminergic modulation is essential for the functioning of the basal ganglia circuitry and has implications for motor control and behavioral disorders .
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
| The paper discusses the role of dopamine modulation in the basal ganglia circuitry and its impact on behavioral disorders in neuropsychiatric conditions such as Parkinson's disease and Tourette's syndrome. | |
| The paper does not directly address the dopaminergic modulation of basal ganglia circuitry. The paper focuses on the dopaminergic modulation occurring in the subthalamo-nigral synapse and its implications for the firing of neurons in the substantia nigra. | |
Open access•Dissertation 16 Apr 2020 1 Citations | The paper discusses the role of neuromodulation in the striatal microcircuit, but it does not specifically mention dopaminergic modulation of basal ganglia circuitry. |
| The paper discusses the role of dopamine in modulating the circuit properties of the basal ganglia, specifically in the songbird basal ganglia. It presents evidence for a unique excitatory interneuron that contributes to neural variability in the circuit. | |
28 Citations | The paper discusses the modulation of dopamine tone on beta oscillations in cortical and basal ganglia networks. It does not specifically address the dopaminergic modulation of basal ganglia circuitry. |
Related Questions
Dopamine's role in motivation and disorders of motivation?4 answersDopamine plays a crucial role in motivation and disorders of motivation. It is involved in pleasure, reward circuits, motivation, motor control, functional ability, perception, sexual satisfaction, lactation prevention, and nausea. Recent studies suggest that dopamine's roles in learning, effort valuation, and reward underlie different subtypes of motivational impairments. Dopamine modulation influences the willingness to invest cognitive effort for rewards, with dopaminergic therapy improving cognitive motivation deficits in patients with Parkinson's disease. The effects of dopamine on cognitive control may reflect indirect modulation of value-based learning and choice computations, altering the motivation to exert control. Dopaminergic therapies have been explored for treating disorders of diminished motivation, showing potential efficacy in managing apathy by attributing incentive salience to reward stimuli and facilitating overcoming effort costs.
How does diabetes affect dopaminergic transmission in the brain?4 answersDiabetes affects dopaminergic transmission in the brain by altering the levels of dopamine and its metabolites, as well as the expression of proteins involved in dopamine release and uptake. In diabetic animals, the content of dopamine is reduced specifically in the dopaminergic nigrostriatal system. Additionally, diabetes leads to oxidative stress in the striatum, which further affects dopamine neurotransmission. The activity of the nigrostriatal dopaminergic system is reduced in diabetes, while norepinephrine levels are altered in various areas of the sympathetic nervous system. Furthermore, diabetes affects the metabolism of dopamine in different brain regions, with changes observed in the cerebellum and cortex. These alterations in dopaminergic transmission may contribute to the dysfunctions observed in brain monoamine transmission in chronic diabetes.
What is the influence of dopamine on learning?5 answersDopamine plays a critical role in learning. It is involved in reinforcement learning by encoding prediction errors and contributes to action selection by regulating decision thresholds. Dopamine neurons mediate the association of conditioned stimuli (CS) with reward and signal the discrepancy between predicted and actual reward during the US. Dopamine also promotes conditioned responses during Pavlovian conditioning, in addition to US reward prediction errors. Rewarding stimuli produce incentive learning, which depends on dopamine. Dopamine depletion impairs the acquisition and maintenance of conditioned incentive stimuli, while dopamine replacement drugs modulate network dynamics during reinforcement learning. Dopamine exerts a widespread effect on neural circuitry and network dynamics during reinforcement learning. Overall, dopamine is crucial for various aspects of learning, including reinforcement learning, associative learning, and the acquisition of conditioned responses.
Dopaminergic regulation of hippocampal plasticity, learning, and memory2 answersDopaminergic regulation plays a crucial role in hippocampal plasticity, learning, and memory. Dopamine release from the ventral tegmental area (VTA) and adrenergic locus coeruleus influences synaptic plasticity in the hippocampus, contributing to the encoding of behavioral episodes into short-term and long-term memory. In the CA3-CA1 circuit, dopamine signaling is involved in contextual learning during inhibitory avoidance (IA) training, with inhibition of D1-like dopamine receptors impairing memory retention and synaptic plasticity induction. Photostimulation of dopaminergic fibers in the dentate gyrus leads to long-term depression of cortical inputs and impairs subsequent contextual learning, suggesting that dopamine enables the hippocampus to encode memory with reduced interference from subsequent experiences. D1/D5 receptors in the hippocampus are crucial for hippocampus-dependent memory, conferring properties of novelty and reward to the stored information. Overall, dopamine regulation is essential for synaptic plasticity, learning, and memory processes in the hippocampus.
What is the impact of dopamine on the brain?5 answersDopamine has a significant impact on the brain. It plays a crucial role in various functions such as executive functions, motor control, motivation, arousal, reinforcement, and reward. Dopamine also regulates the development of interneurons in the cerebral cortex and promotes the production of new neurons in the hippocampus. Additionally, dopamine modulates cortical excitability and activity, affecting cognitive performance, attention, learning, and memory formation. Brain insulin and dopamine signaling are interconnected and influence food intake, reward, and mood. Dysfunction in dopaminergic neurotransmission is associated with neuropsychiatric disorders like Tourette's syndrome, schizophrenia, and drug and alcohol dependence. Dopamine release in different brain regions is linked to salience attribution, reward anticipation, habit formation, and working memory function. Overall, dopamine has a multifaceted impact on the brain, influencing various physiological and cognitive processes.
Dopaminergic neurons in hippocampus1 answersDopaminergic neurons in the hippocampus have been the subject of investigation in several studies. Reymann et al. found that dopaminergic fibers innervate the hippocampus, but they arise from the raphe nuclei rather than the ventral tegmental area. Pohle et al. also investigated the innervation of the hippocampus by dopaminergic neurons and concluded that there is no innervation by the dopaminergic cell groups A-9 and A-10, but they did find dopamine-like aminergic fluorescence in retrogradely labeled neurons in the sphere of the raphe nuclei. Bischoff et al. confirmed the existence of dopamine receptors in the hippocampus and highlighted the need for further research to understand the role of these receptors and the meso-hippocampal dopamine neurons. Therefore, while dopaminergic innervation of the hippocampus has been observed, the specific origin and function of these neurons require further investigation.