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Related Concept Videos

Tetanus01:29

Tetanus

Tetanus is a life-threatening neurological disorder characterized by persistent muscle contractions and spastic paralysis. It is caused by Clostridium tetani, a motile, Gram-positive, rod-shaped, obligate anaerobe. These bacteria produce terminal endospores, giving them a distinctive “lollipop” or “tennis-racket” appearance. They thrive in anaerobic environments, such as those found in deep puncture wounds.Once introduced into the body, the spores germinate into vegetative cells. These cells...
Nondepolarizing (Competitive) Neuromuscular Blockers: Pharmacological Actions01:27

Nondepolarizing (Competitive) Neuromuscular Blockers: Pharmacological Actions

Nondepolarizing neuromuscular blockers prevent the membrane depolarization of muscle cells and inhibit muscle contraction. These are usually administered with anesthetics to achieve complete muscle relaxation. Upon administration, these drugs first block the small, rapidly contracting muscles of the face and hands, followed by the larger muscles of the trunk and the intercostal muscles. The diaphragm is the last muscle to be affected.
Although all competitive neuromuscular blockers are designed...
Drugs Acting on Autonomic Ganglia: Blockers01:28

Drugs Acting on Autonomic Ganglia: Blockers

Ganglionic blockers inhibit autonomic activity by blocking nicotinic receptors in the autonomic ganglia, suppressing impulse transmission. These blockers lack selectivity between sympathetic and parasympathetic ganglia and are ineffective as neuromuscular junction antagonists. They can be categorized into two groups:
Indirect-Acting Cholinergic Agonists: Pharmacological Actions01:30

Indirect-Acting Cholinergic Agonists: Pharmacological Actions

Indirect-acting cholinergic agonists, also known as anticholinesterases, exert their pharmacological effects by enhancing cholinergic transmission in various body parts, including the neuromuscular junction, autonomic cholinergic synapses, and the brain.
At the neuromuscular junction, these agents work by inhibiting the breakdown of acetylcholine, allowing it to remain bound to the receptor and bind to nearby receptors. This process leads to repetitive firing of the endplate, causing muscle...
Botulism01:22

Botulism

Botulism is a life-threatening neuroparalytic condition caused by botulinum neurotoxin, which is produced by the bacterium Clostridium botulinum, a Gram-positive, spore-forming, obligate anaerobe.In adults, the toxin enters the body in different ways: in foodborne botulism, the preformed toxin is absorbed in the intestine. In wound botulism, spores grow in injured tissue and release the toxin into the blood. Infant botulism differs mechanistically from adult forms. In infants, botulism commonly...
Disorders of the Autonomic Nervous System01:18

Disorders of the Autonomic Nervous System

The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
Raynaud's disease, also known as Raynaud's phenomenon, is a...

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Related Experiment Video

Updated: Jul 11, 2026

Subcutaneous Administration of Muscarinic Antagonists and Triple-Immunostaining of the Levator Auris Longus Muscle in Mice
07:09

Subcutaneous Administration of Muscarinic Antagonists and Triple-Immunostaining of the Levator Auris Longus Muscle in Mice

Published on: September 8, 2011

Autonomic dysfunction in tetanus - what lessons can be learnt with specific reference to alpha-2 agonists?

D Freshwater-Turner1, A Udy, J Lipman

  • 1Department of Anaesthesiology and Critical Care, University of Queensland, Level 3 Ned Hanlon Building, RBWH, Butterfield Street, Herston, Qld 4029, Australia.

Anaesthesia
|September 12, 2007
PubMed
Summary

Severe tetanus management is challenging, especially autonomic dysfunction. This case study found elevated adrenaline during crises but limited impact from alpha(2)-agonists on catecholamine levels.

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Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation
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Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation

Published on: September 13, 2015

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Last Updated: Jul 11, 2026

Subcutaneous Administration of Muscarinic Antagonists and Triple-Immunostaining of the Levator Auris Longus Muscle in Mice
07:09

Subcutaneous Administration of Muscarinic Antagonists and Triple-Immunostaining of the Levator Auris Longus Muscle in Mice

Published on: September 8, 2011

Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation
07:53

Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation

Published on: September 13, 2015

Area of Science:

  • Intensive Care Medicine
  • Neurology
  • Pharmacology

Background:

  • Severe tetanus, though rare in developed nations, necessitates intensive care.
  • Management includes mechanical ventilation, sedation, wound care, and antitoxin administration.
  • Autonomic dysfunction presents a significant clinical challenge in severe tetanus cases.

Observation:

  • Serum catecholamine levels, specifically adrenaline, were measured in a severe tetanus patient experiencing persistent autonomic crises.
  • The study investigated the effects of sedatives and alpha(2)-agonists on these catecholamine levels.
  • Adrenaline levels showed up to 100-fold elevation during observed autonomic crises.

Findings:

  • Serum adrenaline levels correlated with the severity of autonomic crises in severe tetanus.
  • Alpha(2)-agonists, at the doses used, did not significantly alter measured catecholamine levels.
  • Clonidine, an alpha(2)-agonist, aided in managing crises when used with other agents.

Implications:

  • This case provides insights into the complex management of severe tetanus and its autonomic complications.
  • Understanding catecholamine fluctuations is crucial for effective patient care.
  • Further research may explore optimal pharmacological strategies for managing tetanus-induced autonomic instability.