disconnection syndrome
A constellation of cognitive and behavioral symptoms resulting from interruption of white matter pathways connecting different brain regions.
Full Definition
Disconnection syndrome refers to neurological and neuropsychological deficits that occur when white matter tracts connecting different brain regions are damaged or severed. This can result from various causes including stroke, trauma, surgery (such as corpus callosotomy), or degenerative diseases affecting white matter. Symptoms depend on which connections are affected and may include difficulties with language, visual-spatial processing, motor coordination, or interhemispheric transfer of information. Classic examples include conduction aphasia (arcuate fasciculus damage) and split-brain syndrome (corpus callosum lesions). The concept emphasizes that brain function depends not only on individual regions but also on their interconnections.
Usage
Usage note: Specify the anatomical location of disconnection when known (e.g., 'callosal disconnection syndrome').
In Context
- "The patient's difficulty with cross-modal tasks suggested a disconnection syndrome affecting interhemispheric communication." — Neuropsychological evaluation
- "DTI imaging revealed white matter damage consistent with disconnection syndrome in the left arcuate fasciculus." — Neuroimaging report