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Related Concept Videos

Motor Unit Stimulation01:20

Motor Unit Stimulation

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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.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
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Vagus Nerve Stimulation As an Adjunctive Neurostimulation Tool in Treatment-resistant Depression
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Vagus nerve stimulation therapy: indications, programing, and outcomes.

Takamichi Yamamoto1

  • 1Comprehensive Epilepsy Center, Seirei Hamamatsu General Hospital.

Neurologia Medico-Chirurgica
|May 1, 2015
PubMed
Summary

Vagus nerve stimulation (VNS) effectively reduces seizures in medically refractory epilepsy patients. This safe neuromodulation therapy also improves mood, memory, and overall quality of life.

Area of Science:

  • Neurology
  • Neurosurgery
  • Epileptology

Background:

  • Medically refractory epilepsy presents significant challenges for patient management.
  • Vagus nerve stimulation (VNS) is an established neuromodulation therapy for epilepsy.
  • VNS is indicated for various epilepsy types and when epilepsy surgery is not an option.

Purpose of the Study:

  • To evaluate the efficacy and safety of Vagus Nerve Stimulation (VNS) for seizure reduction in epilepsy.
  • To explore the long-term outcomes and benefits of VNS therapy.

Main Methods:

  • Analysis of pivotal randomized trials and large retrospective studies on VNS therapy.
  • Review of data from the Japan VNS Registry.
  • Assessment of seizure reduction rates and adverse events over time.

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Main Results:

  • Pivotal trials showed ≥50% seizure reduction in 36.8% (1 year) to 42.7% (3 years) of patients.
  • Retrospective studies reported mean seizure reduction of 55.8% (5 years) and 75.5% (10 years).
  • VNS demonstrated a favorable safety profile with manageable side effects and positive impacts on mood and cognition.

Conclusions:

  • Vagus nerve stimulation is an effective and safe treatment option for medically refractory epilepsy.
  • Optimizing VNS programming with higher settings can enhance seizure control.
  • VNS offers benefits beyond seizure reduction, improving patients' quality of life.