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Related Experiment Video

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"Floppy brain" in congenital hydrocephalus.

Phan Q Duy1,2,3, Kristopher T Kahle4,5,6

  • 1Department of Neuroscience, Yale University School of Medicine, New Haven, CT 06510, United States.

Cerebral Cortex (New York, N.Y. : 1991)
|June 7, 2023
PubMed
Summary

Hydrocephalus can stem from genetic mutations affecting brain development and structural integrity, not just cerebrospinal fluid circulation. This case highlights how altered brain biomechanics may contribute to ventricular enlargement in some patients.

Keywords:
L1CAMaxon developmentbrain biomechanicscortical developmenthydrocephalus

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Area of Science:

  • Neuroscience
  • Genetics
  • Developmental Biology

Background:

  • Hydrocephalus is traditionally viewed as a cerebrospinal fluid (CSF) circulation disorder causing ventricular dilation.
  • Genetic factors, such as mutations in L1CAM, are implicated in hydrocephalus pathogenesis.
  • L1CAM plays a crucial role in neuronal cell adhesion and axon development.

Observation:

  • A patient presented with fetal-onset hydrocephalus and reduced brain volumes due to an L1CAM mutation.
  • Intraoperative CSF drainage led to cortical mantle collapse and a "floppy" brain appearance on neuroimaging.
  • This observation suggests compromised structural integrity of the hydrocephalic brain.

Findings:

  • The case links L1CAM mutations to altered brain development and structural instability.
  • Reduced cortical and white matter volumes were observed in conjunction with hydrocephalus.
  • The brain's inability to maintain structural integrity after CSF drainage was evident.

Implications:

  • This case supports the hypothesis that altered brain biomechanical properties contribute to hydrocephalus.
  • It suggests that impaired brain development and secondary structural instability may cause ventricular enlargement in certain hydrocephalus cases.
  • Understanding these mechanisms can inform future research and therapeutic strategies for hydrocephalus.