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Related Concept Videos

Stimulants01:29

Stimulants

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Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
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Motor Unit Stimulation01:20

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When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
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Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
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Action Potential: Phases of Stimulation01:28

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The action potential is a complex electrical event that occurs in excitable cells, such as neurons and muscle cells. It consists of several distinct phases, each with specific characteristics.
Resting Phase:
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CNS Stimulants: Psychedelic Agents01:22

CNS Stimulants: Psychedelic Agents

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Hallucinogens, also known as psychedelic drugs, are a class of substances known for their ability to alter perception, cognition, and emotions. Despite their profound effects on the mind, these drugs are non-addictive, setting them apart from many other abused substances. The mechanism of action of these drugs lies in their impact on the 5-HT2A receptor in the brain. Upon activation, this receptor couples to Gq-type G proteins, triggering a cascade that releases intracellular calcium. This...
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Drugs Acting on Autonomic Ganglia: Stimulants01:23

Drugs Acting on Autonomic Ganglia: Stimulants

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Ganglionic stimulants activate NM nicotinic receptors in autonomic ganglia, falling into two categories: nicotine mimetics [e.g., lobeline, dimethylpiperazine, tetramethylammonium] and muscarinic receptor agonists [e.g., muscarine, methacholine]. The first category's action is rapid and blocked by nicotinic receptor antagonists, while the second category's action is delayed and blocked by atropine-like agents. Nicotine, an alkaloid, affects the heart rate by stimulating...
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Updated: Jan 27, 2026

Deep Brain Stimulation with Simultaneous fMRI in Rodents
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[Deep brain stimulation].

David Benninger1, Michael Schüpbach2,3,4

  • 11 Service de Neurologie, CHUV, Lausanne.

Therapeutische Umschau. Revue Therapeutique
|April 3, 2019
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Summary
This summary is machine-generated.

Deep brain stimulation (DBS) is a proven neurosurgical therapy using electrical impulses to treat neurological and psychiatric conditions. It offers an option for severe, medication-resistant diseases like Parkinson's and epilepsy.

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Area of Science:

  • Neurosurgery
  • Neurology
  • Psychiatry

Background:

  • Deep brain stimulation (DBS) is a neurosurgical intervention involving implanted electrodes and a neurostimulator.
  • It delivers electrical impulses to specific brain regions for therapeutic purposes.

Purpose of the Study:

  • To summarize the therapeutic efficacy and approved indications of DBS.
  • To highlight DBS as a treatment for severe, medication-refractory neurological and psychiatric disorders.

Main Methods:

  • Implantation of electrodes in targeted brain areas.
  • Application of electrical impulses via a neurostimulator (brain pacemaker).

Main Results:

  • Scientifically proven therapeutic efficacy across various neurological and psychiatric indications.
  • Effective for managing motor fluctuations and dyskinesias in Parkinson's disease.
  • Indicated for dystonia, refractory tremor, epilepsy, and certain pain syndromes.

Conclusions:

  • Deep brain stimulation is an established treatment option for specific, severe neurological and psychiatric conditions.
  • It provides an alternative for patients with inadequate response to conventional medication.
  • Approved indications in Switzerland include Parkinson's disease, dystonia, tremor, epilepsy, and pain syndromes.