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Related Concept Videos

Electroconvulsive Therapy01:30

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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...
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Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
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Electrostimulation for Refractory Epilepsy: A Review.

Chandrika Shenoy1, Hani Aodah Alzahrani1, Adrian R M Upton2

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Summary
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Responsive neural stimulation (RNS) offers a new treatment for epilepsy, with a long-term study showing significant seizure reduction and improved quality of life in many patients with medically refractory epilepsy.

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Area of Science:

  • Neurology
  • Biomedical Engineering

Background:

  • Epilepsy affects 1% of the global population, with over 3 million in North America.
  • Many patients with epilepsy (PWE) experience medically refractory seizures, inadequately managed by antiepileptic drugs due to limited efficacy and adverse effects.
  • Emerging neurostimulation techniques offer adjunctive therapies for difficult-to-treat epilepsy.

Purpose of the Study:

  • To evaluate the efficacy and safety of responsive neural stimulation (RNS) as a therapeutic option for patients with medically refractory epilepsy.
  • To highlight the potential of RNS in managing seizures and improving quality of life in PWE.

Main Methods:

  • Responsive neural stimulation (RNS) is a closed-loop intracranial neurostimulation system approved by the FDA in 2013.
  • RNS utilizes an implantable device with depth electrodes to detect and deliver electrical pulses to epileptic foci, preventing seizures.
  • A 7-year long-term study assessed RNS in over 245 patients with epilepsy.

Main Results:

  • 16% of patients achieved complete seizure freedom.
  • 60% of patients experienced a 50% or greater reduction in seizures.
  • 84% of patients showed some degree of seizure improvement, with 44% reporting enhanced quality of life by year two.

Conclusions:

  • Responsive neural stimulation (RNS) demonstrates significant potential as an effective treatment for medically refractory epilepsy.
  • Further large-scale, randomized controlled trials are necessary to optimize the efficacy and safety of invasive intracranial neurostimulation.
  • RNS offers a promising alternative for patients with epilepsy who do not respond adequately to conventional drug therapies.