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Related Concept Videos

Nervous Tissue: Neuron Types01:19

Nervous Tissue: Neuron Types

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Neurons, the fundamental units of the nervous system, can be classified based on both their structural and functional characteristics.
Structurally, neurons are categorized into three main types: multipolar, bipolar, and unipolar (or pseudounipolar). Multipolar neurons, which are the most common type in the brain and spinal cord, as well as all motor neurons, possess multiple dendrites and a single axon.
Bipolar neurons, on the other hand, have one primary dendrite and one axon. They are...
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Drugs Affecting Neurotransmitter Synthesis01:29

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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,...
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Neuron Structure01:30

Neuron Structure

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Neurons are the main type of cell in the nervous system that generate and transmit electrochemical signals. They primarily communicate with each other using neurotransmitters at specific junctions called synapses. Neurons come in many shapes that often relate to their function, but most share three main structures: an axon and dendrites that extend out from a cell body.
Structure and Function of Neurons
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Neurons: The Cell Body and the Dendrites01:23

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A typical nerve cell comprises three main components: the cell body, dendrites, and the axon. The cell body, also known as the soma or perikaryon, serves as the central biosynthetic hub housing a nucleus surrounded by cytoplasm containing organelles commonly found in most cells. Notably, Nissl bodies, clusters of the rough endoplasmic reticulum and free ribosomes responsible for protein synthesis, are distinctive features of the neuronal cell body. As neurons age, aggregates of a brown pigment...
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Adrenergic Neurons: Neurotransmission01:27

Adrenergic Neurons: Neurotransmission

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Postganglionic sympathetic fibers (except those supplying the sweat glands) releasing noradrenaline or norepinephrine are called noradrenergic or adrenergic neurons. Noradrenaline, dopamine, adrenaline, or epinephrine are collectively called "catecholamines" as they contain a catechol moiety and an amine side chain. The five stages of neurotransmitter release involve their synthesis, storage, release, reuptake and metabolism.
Synthesis: Catecholamine synthesis requires tyrosine, which...
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Excitatory and Inhibitory Effects of Neurotransmitters01:29

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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...
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Related Experiment Video

Updated: Aug 14, 2025

Primary Culture of Mouse Dopaminergic Neurons
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Development, wiring and function of dopamine neuron subtypes.

Oxana Garritsen1, Eljo Y van Battum1, Laurens M Grossouw1

  • 1Department of Translational Neuroscience, UMC Utrecht Brain Center, University Medical Center, Utrecht University, Utrecht, Netherlands.

Nature Reviews. Neuroscience
|January 18, 2023
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Summary
This summary is machine-generated.

The midbrain dopamine (mDA) system comprises distinct neuron subtypes crucial for behavior and disease. Understanding their development and circuits advances neuroscience and therapeutic strategies for brain disorders.

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Related Experiment Videos

Last Updated: Aug 14, 2025

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Developmental Biology

Background:

  • The midbrain dopamine (mDA) system has distinct neuron subtypes.
  • These subtypes mediate specific behaviors and are implicated in brain diseases.
  • Understanding mDA neuron development and function is key to addressing neurological disorders.

Purpose of the Study:

  • To review recent advances in understanding molecularly defined mDA neuron subtypes.
  • To explore the development, wiring, and function of these neuronal subtypes.
  • To discuss future implications for therapeutic strategies targeting mDA neuron-related diseases.

Main Methods:

  • Review of recent scientific literature on mDA neuron subtypes.
  • Analysis of studies on mDA neuron development, including migration and axon guidance.
  • Examination of research on mDA neuron circuits, function, and disease links.

Main Results:

  • Significant progress has been made in identifying diverse mDA neuron subtypes.
  • Understanding of developmental processes shaping mDA neuron circuits is increasing.
  • The selective vulnerability of mDA neurons in disease is becoming clearer.

Conclusions:

  • Advances in understanding mDA neuron subtypes and circuits are crucial for neuroscience.
  • This knowledge will accelerate the development of targeted therapies for brain diseases.
  • Future research directions focus on developmental events, wiring, and functional roles.