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Electroconvulsive Therapy

Electroconvulsive Therapy

Electroconvulsive therapy (ECT), or shock therapy, remains a critical biomedical intervention for severe, treatment-resistant depression. While its origins can be traced back to Hippocrates' observations that malaria-induced convulsions alleviated mental illness, modern ECT has evolved significantly from its earlier, more primitive applications. First introduced in 1938 by Ugo Cerletti and his colleagues, ECT involves inducing controlled seizures using electrical currents. In its early years,...

Depolarizing Blockers: Mechanism of Action

Depolarizing Blockers: Mechanism of Action

Depolarizing blockers act on skeletal muscle fibers' membranes and induce their depolarization. Most depolarizing blockers have two quaternary N+ atoms that bind the nicotinic acetylcholine receptors and cause neuromuscular blockade within minutes.
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Nondepolarizing (Competitive) Neuromuscular Blockers: Mechanism of Action

Nondepolarizing (Competitive) Neuromuscular Blockers: Mechanism of Action

Nondepolarizing neuromuscular blockers induce paralysis by competitively blocking nicotinic acetylcholine receptors at the muscle end plate. Examples include pancuronium, mivacurium, vecuronium, and rocuronium. These quaternary ammonium derivatives are administered intravenously, are poorly absorbed, and are excreted via the kidneys.
Competitive antagonists prevent acetylcholine from binding to its receptor, inhibiting membrane depolarization. Without conformational changes or intrinsic...

Nondepolarizing (Competitive) Neuromuscular Blockers: Pharmacological Actions

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...

Nondepolarizing (Competitive) Neuromuscular Blockers: Pharmacokinetics

Nondepolarizing (Competitive) Neuromuscular Blockers: Pharmacokinetics

All neuromuscular blocking agents are injected intravenously because they are poorly absorbed from the GI tract. Rapid onset is achieved with intravenous administration, although absorption is also adequate from an intramuscular injection. Since these agents are highly ionized, they do not readily penetrate cell membranes or cross the blood-brain barrier.
Instead, they are transported by the blood to different tissues. Muscles with a greater blood supply (arteries) and blood flow receive more...

Neuromuscular Junction And Blockade

Neuromuscular Junction And Blockade

The site of chemical communication between a motor neuron and a muscle fiber is called the neuromuscular junction (NMJ). The end of the motor neuron at the NMJ divides into a cluster of synaptic end bulbs. The cytoplasm of these bulbs consists of synaptic vesicles enclosing acetylcholine molecules, the principal neurotransmitter released at the NMJ. The region opposite the synaptic bulb that ends in the muscle fiber is called the motor end plate, which has acetylcholine receptors. Within the...

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Related Experiment Video

Updated: May 27, 2026

Pupillary Response as Assessment of Effective Seizure Induction by Electroconvulsive Therapy

Pupillary Response as Assessment of Effective Seizure Induction by Electroconvulsive Therapy

Published on: April 11, 2019

Neuromuscular blocking agents for electroconvulsive therapy: a systematic review.

H Mirzakhani¹, C A Welch, M Eikermann

¹Department of Anaesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, USA.

Acta Anaesthesiologica Scandinavica

|November 19, 2011

Summary

This summary is machine-generated.

Electroconvulsive therapy (ECT) uses electrical stimuli for psychiatric disorders. Proper dosing of neuromuscular blocking agents (NMBAs) ensures seizure efficacy and patient safety during ECT procedures.

More Related Videos

Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins

Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins

Published on: August 15, 2017

Related Experiment Videos

Last Updated: May 27, 2026

Pupillary Response as Assessment of Effective Seizure Induction by Electroconvulsive Therapy

Pupillary Response as Assessment of Effective Seizure Induction by Electroconvulsive Therapy

Published on: April 11, 2019

Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins

Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins

Published on: August 15, 2017

Area of Science:

Neurology
Psychiatry
Anesthesiology

Background:

Electroconvulsive therapy (ECT) is a vital treatment for specific psychiatric conditions.
Patient safety during ECT necessitates anesthesia and neuromuscular blocking agents (NMBAs).

Purpose of the Study:

To review current concepts in NMBA management for ECT.
To optimize NMBA dosage for effective seizure induction and patient safety.

Main Methods:

Review of current literature on NMBA use in ECT.
Analysis of optimal dosing strategies for muscle relaxants during ECT.

Main Results:

The ideal NMBA dose minimizes muscle contractions without causing complete paralysis.
Residual motor activity aids in confirming seizure occurrence.
Nondepolarizing NMBAs are preferred for patients with specific comorbidities.

Conclusions:

Appropriate NMBA selection and dosing are crucial for safe and effective ECT.
Understanding NMBA pharmacology is essential for clinicians performing ECT.