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Related Concept Videos

Increased Intracranial Pressure l: Introduction01:14

Increased Intracranial Pressure l: Introduction

Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...
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Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...
Increased Intracranial Pressure ll: Pathophysiology01:29

Increased Intracranial Pressure ll: Pathophysiology

Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins with...

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Related Experiment Video

Updated: May 21, 2026

Frontal Disconnection for Treating Mild Malformation of Cortical Development with Oligodendroglial Hyperplasia in Epilepsy (MOGHE) in the Frontal Lobe
06:04

Frontal Disconnection for Treating Mild Malformation of Cortical Development with Oligodendroglial Hyperplasia in Epilepsy (MOGHE) in the Frontal Lobe

Published on: August 16, 2024

Pediatric complex Chiari I Malformation-how complex is it?

Amparo Saenz1, Honglin Zhu2, Jasneet Dhaliwal2

  • 1Pediatric Neurosurgery Department, Great Ormond Street Hospital, London, UK. amparo.saenz@ucl.ac.uk.

Child'S Nervous System : Chns : Official Journal of the International Society for Pediatric Neurosurgery
|May 20, 2026
PubMed
Summary
This summary is machine-generated.

Isolated foramen magnum decompression (FMD) effectively treats pediatric complex Chiari I Malformation (CCM). This approach improved symptoms and imaging, avoiding the need for additional occipitocervical fixation or ventral decompression.

Keywords:
Chiari malformationForamen magnum decompressionPediatric neurosurgerySpine

Related Experiment Videos

Last Updated: May 21, 2026

Frontal Disconnection for Treating Mild Malformation of Cortical Development with Oligodendroglial Hyperplasia in Epilepsy (MOGHE) in the Frontal Lobe
06:04

Frontal Disconnection for Treating Mild Malformation of Cortical Development with Oligodendroglial Hyperplasia in Epilepsy (MOGHE) in the Frontal Lobe

Published on: August 16, 2024

Area of Science:

  • Neurosurgery
  • Pediatric Neurology
  • Craniovertebral Junction Disorders

Background:

  • Pediatric complex Chiari I Malformation (CCM) involves Chiari I with craniovertebral junction anomalies.
  • CCM historically shows higher failure rates with foramen magnum decompression (FMD) alone.
  • Occipitocervical fixation (OCF) or ventral decompression are sometimes advocated for CCM.

Purpose of the Study:

  • To evaluate the efficacy of isolated foramen magnum decompression (FMD) in pediatric complex Chiari I Malformation (CCM).
  • To assess clinical and radiological outcomes of isolated FMD in CCM patients.
  • To determine if additional OCF or ventral decompression is necessary in CCM.

Main Methods:

  • Retrospective analysis of a prospective surgical database (March 2020-December 2023).
  • Inclusion criteria: pediatric CCM patients with complete imaging and ≥6-month follow-up.
  • Assessment of pre- and postoperative imaging for tonsillar descent, brainstem crowding, CSF flow, and syringomyelia; clinical outcomes recorded.

Main Results:

  • Forty-one pediatric CCM patients underwent isolated FMD.
  • Significant reduction in headache prevalence (73.2% to 7.3%) and improvement in tonsillar descent (15.0 mm to 0.0 mm).
  • Radiological improvements included reduced obex ectopia, improved CSF flow, increased craniocervical angle, and decreased pb-C2 distance; no patient required OCF or ventral decompression.

Conclusions:

  • Isolated FMD is an effective treatment for pediatric CCM, yielding significant clinical and radiological improvements.
  • Routine addition of OCF or ventral decompression may not be necessary for most pediatric CCM cases.
  • Isolated FMD preserves cervical mobility and minimizes patient morbidity.