Related Experiment Videos
Pathogenesis of four-layered microgyric cortex in man
Abstract:
Microgyria (polygria, polymicrogyria) has stimulated continued interest since its first description by Meschede [28]. Based on analysis of case material, available staining techniques, and known principles of human cortical development, subsequent investigators have proposed numerous theories to explain its pathogenesis. We have studied a case which cannot be fully explained by these previously proposed theories. In this case, four-layered microgyria is present bilaterally in middle cerebral artery distribution, but in one hemisphere, in the center of the malformed area, the deep acellular and cellular layers are replaced by radially aligned neurons extending ectopically into prospective white matter. Analysis of the findings in this case provide evidence that the recently described pathogenetic mechanism observed in a rat model of this malformation [15,16] is applicable to its formation in man.
Insights
This study investigates a unique case of microgyria (polygria, polymicrogyria), revealing ectopic neurons in the white matter. Findings suggest a rat model
Area of Science:
- Neuroscience
- Developmental Neuroscience
- Neuropathology
Background:
- Microgyria (polygria, polymicrogyria) is a congenital brain malformation characterized by an increased number of small, abnormally convoluted cerebral gyri.
- Numerous theories exist regarding the pathogenesis of microgyria, primarily based on human case studies and principles of cortical development.
Purpose of the Study:
- To analyze a unique case of bilateral microgyria that presented atypical features not fully explained by existing theories.
- To investigate the pathogenetic mechanisms underlying this specific microgyria presentation.
Main Methods:
- Case study analysis of a patient with bilateral microgyria.
- Histopathological examination utilizing various staining techniques.
- Comparison of findings with established principles of human cortical development and animal models.
Main Results:
- The case exhibited four-layered microgyria bilaterally within the middle cerebral artery distribution.
- A unique finding in one hemisphere was the replacement of deep layers by radially aligned neurons extending ectopically into the white matter.
- These findings align with a recently described pathogenetic mechanism observed in a rat model of microgyria.
Conclusions:
- The observed ectopic neuronal migration in microgyria supports a specific pathogenetic mechanism previously identified in a rat model.
- This case expands our understanding of microgyria formation and its potential underlying mechanisms in humans.