Language and verbal memory after right hemispheric stroke: a clinical-CT scan study

Area of Science:

• Neuroscience
• Psycholinguistics
• Cognitive Psychology

Background:

• The role of the right hemisphere in language processing remains debated.
• Previous research suggests right-hemisphere damage (RHD) may impact certain linguistic functions.

Purpose of the Study:

• To investigate the effects of RHD on language and verbal memory.
• To compare RHD patients with normal controls and non-aphasic left-hemisphere damaged (LHD) subjects.

Main Methods:

• Evaluated language and verbal memory performance in 26 RHD patients, 11 non-aphasic LHD patients, and normal controls.
• Utilized CT scans to identify lesion locations in RHD patients.
• Assessed phonological, syntactic, naming, and free recall abilities.

Main Results:

• Phonological and syntactic performance were generally unimpaired in RHD patients.
• A subgroup of RHD patients with subcortical lesions showed mild impairment in naming tasks.
• RHD patients exhibited a reduced recency effect in free recall compared to controls.

Conclusions:

• RHD has limited impact on core phonological and syntactic language abilities.
• Subcortical lesions in RHD may specifically affect naming.
• RHD influences verbal memory, particularly the recency effect, suggesting right-hemisphere involvement in memory recall mechanisms.