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White matter: beyond focal disconnection.

Christopher M Filley¹

¹Behavioral Neurology Section, University of Colorado School of Medicine, 12631 East 17th Avenue, MS B185, Aurora, CO 80045, USA. christopher.filley@ucdenver.edu

Neurologic Clinics

|December 22, 2010

Summary

White matter disorders disrupt neural networks, causing cognitive and emotional dysfunction. Understanding white matter neuropathology is key to addressing dementia and neuropsychiatric conditions.

Area of Science:

Neuroscience
Neuropathology
Behavioral Neurology

Background:

Complex disorders like dementia and neuropsychiatric conditions involve distributed neural networks.
White matter neuropathology is increasingly recognized in network disconnection syndromes.
These disorders manifest as functional asynchrony between interdependent brain regions.

Purpose of the Study:

To explore the role of white matter neuropathology in network disconnection syndromes.
To differentiate the specific white matter disruptions in white matter dementia versus neuropsychiatric disorders.
To highlight the potential of studying white matter for advancing behavioral neurology and neuropsychiatry.

Main Methods:

Review of accumulating evidence on white matter disorders.

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Analysis of the connection between white matter pathology and network dysfunction.

Comparative examination of frontal systems connectivity in dementia versus frontal and temporal systems in neuropsychiatric disorders.

Main Results:

White matter disorders lead to functional asynchrony in cerebral regions.
White matter dementia is primarily linked to disturbed frontal systems connectivity.
Neuropsychiatric disorders are associated with disruptions in both frontal and temporal lobe systems.

Conclusions:

White matter neuropathology is a critical factor in the pathogenesis of network disconnection syndromes.
Targeted study of white matter connectivity offers insights into cognitive and emotional dysfunctions.
Further research into normal and abnormal white matter is essential for resolving challenges in behavioral neurology and neuropsychiatry.