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Related Concept Videos

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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Functional Evaluation of Biological Neurotoxins in Networked Cultures of Stem Cell-derived Central Nervous System Neurons
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Published on: February 5, 2015

C1 neurons: the body's EMTs.

Patrice G Guyenet1, Ruth L Stornetta, Genrieta Bochorishvili

  • 1Department of Pharmacology, University of Virginia, Charlottesville, VA 22908-0735, USA. pgg@virginia.edu

American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
|May 24, 2013
PubMed
Summary

C1 neurons in the ventrolateral medulla regulate autonomic, metabolic, and neuroendocrine functions. These neurons are crucial for survival responses to stress and maintaining homeostasis, but hyperactivity may link to hypertension.

Keywords:
C1 neuronsblood pressurebrain stem

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Area of Science:

  • Neuroscience
  • Autonomic Nervous System Regulation
  • Cardiovascular Physiology

Background:

  • C1 neurons are located in the rostral and intermediate ventrolateral medulla (RVLM, IVLM).
  • These neurons utilize glutamate as a neurotransmitter and synthesize catecholamines and neuropeptides.
  • They project to the paraventricular nucleus and autonomic preganglionic neurons, influencing the hypothalamic-pituitary axis and autonomic nervous system.

Purpose of the Study:

  • To elucidate the multifaceted roles of C1 neurons in physiological regulation.
  • To understand how C1 neurons respond to various physiological stressors.
  • To explore the contribution of C1 cells to homeostasis and disease states like hypertension.

Main Methods:

  • The study is based on existing literature, analyzing axonal projections, synaptic inputs, and known effects of C1 cells.
  • Functional roles were inferred from responses to stimuli like hypoglycemia, infection, hypoxia, nociception, and hypotension.
  • The organization and recruitment patterns of C1 cell subsets were investigated.

Main Results:

  • C1 neurons are activated by diverse stressors including hypoglycemia, infection, hypoxia, nociception, and hypotension.
  • They play a key role in glucoprivic responses, breathing stimulation, and activation of noradrenergic systems like the locus coeruleus.
  • Specific subsets of C1 cells are differentially recruited to orchestrate autonomic, metabolic, and neuroendocrine survival responses.

Conclusions:

  • C1 cells are critical for coordinating survival mechanisms during acute physical and physiological challenges.
  • These neurons contribute to maintaining glucose and cardiovascular homeostasis under basal conditions.
  • Hyperactivity of C1 cells is implicated in the elevated sympathetic nerve activity observed in hypertension.