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Related Concept Videos

Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

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.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Seizures: Classification01:13

Seizures: Classification

Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Encephalitis l: Introduction01:19

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
Seizures l: Introduction01:20

Seizures l: Introduction

Understanding seizures and epilepsy relies on key definitions that help in recognizing, classifying, and managing these disorders. These definitions provide a framework for recognizing, classifying, and managing seizure disorders.DefinitionsA seizure is a sudden, abnormal burst of electrical activity in the brain that can cause changes in awareness, movement, sensation, or behavior, depending on the area involved. Epilepsy is a chronic condition characterized by recurrent, unprovoked seizures,...
Seizures ll: Types01:19

Seizures ll: Types

Seizures are sudden bursts of abnormal electrical discharge in the brain that interfere with normal function. They are commonly divided into three groups: focal seizures, generalized seizures, and other types that do not fit neatly into either category.Focal SeizuresFocal seizures begin in a single brain region. When awareness is preserved, they are called focal aware seizures and may cause sensations such as tingling, unusual smells, or flashing lights. When awareness is impaired, they are...
Epilepsy ll: Types01:22

Epilepsy ll: Types

Recurrent seizures, stemming from abnormal electrical activity in the brain, are the defining characteristic of epilepsy, a chronic neurological condition. Because seizure features vary greatly, epilepsy is classified using two systems: by seizure type and by epilepsy syndromes. These classifications enable clinicians to describe seizure patterns and select suitable treatment strategies.I. Classification by Seizure Type1. Focal EpilepsyFocal epilepsy begins in one hemisphere of the brain.

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Related Experiment Video

Updated: Jun 30, 2026

Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex
09:00

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Clinical expression and EEG features of patients with juvenile myoclonic epilepsy (JME) from North India.

M M Mehndiratta1, P Aggarwal

  • 1Department of Neurology, G.B. Pant Hospital, New Delhi, India. mmehndi@vsnl.acom

Seizure
|September 19, 2002
PubMed
Summary
This summary is machine-generated.

Juvenile Myoclonic Epilepsy (JME) patients in New Delhi showed clinical and EEG features similar to global reports, with a higher incidence of febrile convulsions. Most patients responded well to valproate, but some required alternative antiepileptic drugs for seizure control.

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Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
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Area of Science:

  • Neurology
  • Epileptology
  • Clinical Neuroscience

Background:

  • Juvenile Myoclonic Epilepsy (JME) is a distinct epileptic syndrome.
  • Understanding JME's clinical profile, EEG characteristics, and treatment response is crucial for effective management.
  • Previous studies have described JME globally, but regional variations may exist.

Purpose of the Study:

  • To characterize the clinical presentation, electroencephalogram (EEG) findings, and treatment outcomes in a cohort of Juvenile Myoclonic Epilepsy (JME) patients.
  • To identify potential ethnic variations or ascertainment biases, such as the incidence of febrile convulsions (FC) in JME.
  • To assess the diagnostic delay and factors contributing to it in JME patients.

Main Methods:

  • A prospective study of 103 JME probands was conducted using a standardized protocol.
  • Data collected included age of onset, seizure types and frequencies, EEG abnormalities, family history, and response to antiepileptic drugs (AEDs).
  • Patients were treated in a superspeciality university hospital, with detailed follow-up on treatment efficacy.

Main Results:

  • The mean age of onset for JME was 14.01 years, with a male to female ratio of 1.19:1.
  • Myoclonic jerks were universal; generalized tonic-clonic seizures (GTCS) occurred in 75.72%, and absence seizures in 11.65%. A higher incidence of febrile convulsions (9.7%) was noted.
  • Interictal EEG showed generalized polyspike and wave (PSW) discharges in 39.80% of patients. 80.58% responded well to valproate, while 11.65% required additional AEDs for GTCS control.

Conclusions:

  • The clinical and EEG features of JME patients in this cohort were largely consistent with international findings.
  • A higher incidence of febrile convulsions in this population may suggest ethnic variations or ascertainment bias.
  • A significant diagnostic delay was observed, attributed to unfamiliarity with JME among referring physicians, highlighting the need for increased awareness and education.