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Seizures: Classification

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:

Somatic Spinal Reflexes

Somatic Spinal Reflexes

Somatic spinal reflexes are rapid, involuntary muscular responses to external stimuli that involve the somatic musculature and the spinal cord.
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...

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Related Experiment Video

Updated: Feb 25, 2026

Full-Endoscopic Surgery for Hypothalamic Hamartoma Resection

Full-Endoscopic Surgery for Hypothalamic Hamartoma Resection

Published on: April 12, 2024

Hypothalamic hamartoma presenting with infantile spasms.

Uğur Işık¹, Sema Saltık², Bahattin Tanrıkulu³

¹Department of Pediatrics, Division of Pediatric Neurology, Acıbadem University School of Medicine, Istanbul, Turkey. ugur.isik@acibadem.com.tr.

Child'S Nervous System : Chns : Official Journal of the International Society for Pediatric Neurosurgery

|August 2, 2017

Summary

Hypothalamic hamartomas (HH) are rarely associated with infantile spasms (IS). Surgical intervention for HH led to complete seizure remission in a pediatric patient with IS, highlighting HH in IS differential diagnoses.

Keywords:

Disconnection surgery Gelastic seizures Hypothalamic hamartoma Infantile spasms

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Area of Science:

Pediatric Neurology
Epileptology
Neuroimaging

Background:

Hypothalamic hamartomas (HH) typically manifest as gelastic seizures in children.
Infantile spasms (IS) are a severe epilepsy syndrome in infancy.

Observation:

A 6-month-old boy presented with IS, with MRI revealing a hypothalamic mass consistent with HH.
The patient's IS were refractory to standard antiepileptic drugs, including vigabatrin and valproic acid.

Findings:

Surgical disconnection of the hypothalamic hamartoma resulted in immediate cessation of infantile spasms.
The patient remained seizure-free for two years post-operatively.

Implications:

This case suggests hypothalamic hamartomas should be considered in the differential diagnosis of infantile spasms.
Early diagnosis and surgical treatment of HH may offer a favorable outcome for refractory IS.