Related Experiment Video
Updated: Sep 28, 2025
11:26
Assessment of Dopaminergic Homeostasis in Mice by Use of High-performance Liquid Chromatography Analysis and Synaptosomal Dopamine Uptake
Published on: September 21, 2017
12.6K
Dopamine neurons evaluate natural fluctuations in performance quality.
Alison Duffy1, Kenneth W Latimer2, Jesse H Goldberg3
1Department of Physiology and Biophysics, University of Washington, Seattle, WA 98195, USA; Computational Neuroscience Center, University of Washington, Seattle, WA 98195, USA.
Cell Reports
|March 30, 2022
Summary
Dopamine neurons evaluate natural song fluctuations in singing birds, correlating with recent song variations. This suggests dopamine signals performance quality without external cues or rewards.
Area of Science:
- Neuroscience
- Animal Behavior
- Bioacoustics
Background:
- Motor skills are learned by comparing performance to internal benchmarks.
- Dopamine neurons are known to encode externally induced performance errors.
- The role of dopamine in evaluating natural behavioral fluctuations is unclear.
Purpose of the Study:
- To investigate whether dopamine neurons signal the quality of natural performance fluctuations.
- To examine the correlation between spontaneous dopamine neuron activity and natural song variations in singing birds.
Main Methods:
- Recording dopamine neuron activity in singing birds.
- Analyzing spontaneous dopamine spiking activity.
- Correlating dopamine neuron activity with natural song variations.
Main Results:
- Spontaneous dopamine neuron activity correlates with recent, not future, song variations.
- Maximal dopamine spiking occurs at specific vocal targets.
- Dopamine neuron activity reflects song evaluation rather than production.
Conclusions:
- Spontaneous dopamine spiking can evaluate natural behavioral fluctuations.
- This evaluation occurs independently of experimental events like cues or rewards.
- Findings suggest dopamine's role in assessing performance quality during natural behavior.
Related Concept Videos
01:37Neural Regulation
40.4K
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
40.4K
01:27Diencephalon: Thalamus and Information Relay
2.3K
The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological...
2.3K
01:29Drugs Affecting Neurotransmitter Synthesis
1.6K
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,...
1.6K
01:23Optimal Arousal Theory
330
The optimal arousal theory suggests that performance is maximized when an individual experiences a moderate level of arousal. This theory is closely tied to the Yerkes-Dodson law, which illustrates an inverted U-shaped relationship between arousal and performance. The law, formulated by psychologists Robert Yerkes and John Dodson, implies an ideal arousal level for optimal performance, and deviations from this level can lead to declines in effectiveness.
Inverted U-Shaped Performance Curve
The...
Inverted U-Shaped Performance Curve
The...
330
01:29Excitatory and Inhibitory Effects of Neurotransmitters
10.9K
When an action potential reaches the presynaptic axon terminal, it releases neurotransmitters from the neuron into the synaptic cleft at a chemical synapse. The released neurotransmitter can be excitatory or inhibitory. The critical criteria commonly used to determine whether a molecule is a neurotransmitter at a chemical synapse are the molecule's presence in the presynaptic neuron. Second, its release is in response to strong presynaptic depolarization. And lastly, the presence of...
10.9K
01:31Neurotransmitters
1.6K
Neurotransmitters are essential chemical messengers within the nervous system, facilitating the communication between neurons. These chemical messengers, varying in function and effect, are critical for sustaining various aspects of neurological health and emotional well-being.
1.6K