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Related Concept Videos

Seizures: Classification01:13

Seizures: Classification

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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:
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Epilepsy and Seizures: Overview01:24

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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.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
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Classical Conditioning01:18

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Associative learning, a core principle in behavioral psychology, involves forming connections between events and facilitating learned responses. This concept is vividly illustrated by classical conditioning, a process extensively studied by the Russian physiologist Ivan Pavlov. Pavlov's pioneering research on dogs' digestive systems led to the discovery that behaviors can be learned through association, laying the groundwork for classical conditioning.
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Equilibrium refers to a state where a rigid body is not subjected to any translational or rotational motion. This state is achieved when the force and couple acting on a rigid body equal zero. When the system of external forces results in a net effect equivalent to zero, the rigid body is considered to be in equilibrium.
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Related Experiment Video

Updated: Jan 29, 2026

Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins
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Neurologic Conditions: New-Onset Seizures in Adults.

James E McKinley1, Allen Perkins2

  • 1Crestwood Medical Center, 1 Hospital Drive Southwest, Huntsville, AL 35801.

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|February 13, 2019
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Adults experiencing a new seizure require prompt evaluation for various causes, from metabolic issues to psychogenic factors. Treatment decisions, including antiepileptic drug use and driving restrictions, depend on the risk of seizure recurrence.

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Area of Science:

  • Neurology
  • Emergency Medicine
  • Family Medicine

Background:

  • Family physicians often serve as the initial point of contact for adults presenting with new-onset seizures.
  • Seizures in adults stem from diverse etiologies, including provoked (metabolic, infectious, vascular, withdrawal, trauma) and unprovoked (cerebral conditions) causes.
  • Nonorganic causes, such as psychogenic nonepileptiform convulsions (pseudoseizures), must also be considered.

Purpose of the Study:

  • To outline the diagnostic and management approach for adults with new-onset seizures.
  • To emphasize the importance of considering various etiologies and appropriate investigations.
  • To guide clinical decision-making regarding antiepileptic drug initiation and patient counseling.

Main Methods:

  • Initial assessment in the emergency department should include a computed tomography (CT) scan of the head for all patients.
  • Further evaluation with electroencephalogram (EEG) and magnetic resonance imaging (MRI) is recommended for seizures unrelated to trauma, alcohol, or drugs.
  • Risk assessment for seizure recurrence is crucial for determining the need for antiepileptic drug (AED) therapy.

Main Results:

  • A single seizure does not automatically warrant AED initiation; the risk of recurrence is the primary determinant.
  • Patients must be advised against driving until seizure-free for a minimum of 3 months.
  • Information regarding the potential teratogenicity of AEDs should be provided to patients planning pregnancy.

Conclusions:

  • Comprehensive evaluation is essential for adults with new-onset seizures to identify underlying etiologies.
  • Management strategies should be individualized based on the seizure type, cause, and risk of recurrence.
  • Patient counseling on driving restrictions and reproductive health is a critical component of care.