When a Large Left Hemisphere Stroke is All Right for Language, Praxis, and Visual Attention
Year: 2025
Type: article
Study design: Case Report
Abstract: Objectives: To describe a rare case of large left hemisphere (LH) middle cerebral artery (MCA) stroke with intact language, praxis, visuospatial cognition, and attention, suggesting lateralization of all these functions to the intact right hemisphere (RH). Methods: A 53-year-old right-handed woman who had a stroke at age 42 was enrolled in a study of long-term stroke outcomes. She underwent standardized behavioral assessments and functional MRI (fMRI) with a visual field test and an adaptive semantic matching task. Results: area of encephalomalacia, encompassing both MCA and posterior anterior cerebral artery territories of the LH, she exhibited intact language both acutely and chronically (Western Aphasia Battery Aphasia Quotient = 99.2) and normal praxis. fMRI demonstrated right-hemisphere dominance for language. Visuospatial cognition and attention were preserved (WASI II-Block Design; Behavioral Inattention Test-conventional subtests) despite right hemianopia. Discussion: This case suggests that language, praxis, and visuospatial functions can simultaneously lateralize to the RH. Although previous cases report reciprocal hemispheric reorganization, such as in crossed aphasia, this case of "crossed non-aphasia" supports the view that lateralization of functions can occur independently. Clinically, this rare pattern of atypical lateralization should be considered when expected poststroke deficits are absent.
Source: Neurology Open Access
Language: English
Subfield: Cognitive Neuroscience
Field: Neuroscience
Domain: Life Sciences
Open Access status: diamond
Awards: G2788699681, G2915628531
OpenAlex ID: W4416928714