Related Experiment Video

Updated: May 30, 2026

Assessing Changes in Synaptic Plasticity Using an Awake Closed-Head Injury Model of Mild Traumatic Brain Injury
09:49

Assessing Changes in Synaptic Plasticity Using an Awake Closed-Head Injury Model of Mild Traumatic Brain Injury

Published on: January 20, 2023

Brain damage and IQ in unilateral Sturge-Weber syndrome: support for a "fresh start" hypothesis

Michael E Behen1, Csaba Juhász, Cortney Wolfe-Christensen

  • 1Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit, MI 48201, USA. mbehen@pet.wayne.edu

Epilepsy & Behavior : E&B
|August 20, 2011
PubMed

Insights

Severe brain hypometabolism in children with Sturge-Weber syndrome shows a U-shaped link to IQ. Intermediate lesion size correlates with lower IQ, while small or absent lesions are linked to better cognitive outcomes.

Area of Science:

  • Neuroscience
  • Pediatric Neurology
  • Medical Imaging

Background:

  • Unilateral Sturge-Weber syndrome (SWS) can impact cognitive development.
  • The relationship between brain hypometabolism extent and IQ in SWS is not fully understood.

Purpose of the Study:

  • To investigate the relationship between the extent of severe hypometabolism and IQ in children with unilateral SWS.
  • To determine if this relationship is linear or nonlinear (U-shaped).

Main Methods:

  • Thirty-five children with unilateral SWS underwent cognitive assessment.
  • Interictal fluorodeoxyglucose positron emission tomography (FDG-PET) scans measured brain metabolism.
  • Regression analyses examined the association between hypometabolism extent and IQ, controlling for seizure variables.

Main Results:

  • A significant U-shaped (quadratic) relationship was observed between the extent of severe cortical hypometabolism and IQ.
  • Intermediate extents of severe hypometabolism were associated with the lowest IQ scores.
  • Small or absent severe hypometabolism lesions correlated with the highest IQ scores, and very large lesions were also linked to relatively preserved cognitive function.

Conclusions:

  • The extent of severe hypometabolism, not total hypometabolism, has a nonlinear association with IQ in pediatric unilateral SWS.
  • Seizure variables also significantly influence cognitive function in these children.
  • These findings highlight the complex interplay between brain lesion characteristics, metabolism, and cognitive outcomes in SWS.

More Related Videos

Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury10:59

Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury

Published on: November 19, 2012

A Pediatric Concussion Model in Mice: Closed Head Injury with Long-Term Disorders (CHILD)07:01

A Pediatric Concussion Model in Mice: Closed Head Injury with Long-Term Disorders (CHILD)

Published on: February 7, 2025

Related Concept Videos

Traumatic Brain Injury l: Introduction01:28

Traumatic Brain Injury l: Introduction

DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...
Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...