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Related Experiment Video

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Modeling Posthemorrhagic Hydrocephalus of Prematurity in Rats

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Published on: March 28, 2025

Neuropathology and structural changes in hydrocephalus.

Marc R Del Bigio¹

¹Department of Pathology, University of Manitoba, and Manitoba Institute of Child Health, Winnipeg, Manitoba, Canada. delbigi@cc.umanitoba.ca

Developmental Disabilities Research Reviews

|April 27, 2010

Summary

Hydrocephalus in spina bifida causes brain dysfunction by damaging white matter axons. While shunting can reverse some effects, destroyed axons are permanently lost.

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Area of Science:

Neuroscience
Developmental Biology
Pediatric Neurology

Background:

Hydrocephalus is a common complication in spina bifida, often stemming from posterior fossa crowding and cerebrospinal fluid (CSF) flow obstruction.
Enlarged cerebral ventricles in hydrocephalus lead to progressive destruction of periventricular white matter axons.
This axonal damage disrupts crucial neural pathways, affecting motor, sensory, visual, and memory functions.

Purpose of the Study:

To elucidate the mechanisms of brain dysfunction in hydrocephalus associated with spina bifida.
To investigate the impact of ventricular enlargement on white matter integrity and neuronal pathways.
To explore the potential for reversibility of hydrocephalic brain dysfunction.

Main Methods:

The study reviews the pathophysiology of hydrocephalus in spina bifida, focusing on the effects of ventricular enlargement on brain structures.
It examines the consequences of axonal destruction on various neural systems, including projection axons and subcortical pathways.
The potential therapeutic effects of shunting on brain function are discussed in relation to cerebral blood flow and the extracellular environment.

Main Results:

Hydrocephalus in spina bifida primarily results from CSF flow obstruction, leading to ventricular enlargement and white matter axon destruction.
Damage to long projection axons and periventricular structures causes subcortical disconnection, manifesting as brain dysfunction.
While shunting may offer partial recovery by improving blood flow and the extracellular environment, it cannot restore destroyed axons.

Conclusions:

Hydrocephalic brain dysfunction in spina bifida is characterized by subcortical disconnection due to axonal damage.
Shunting can partially reverse brain dysfunction, but the loss of axons is irreversible.
Understanding these mechanisms is crucial for managing neurological deficits in patients with spina bifida and hydrocephalus.