AI Article Synopsis
- The study examined how different brain lesion patterns from penetrating head injuries impact various types of memory in veterans from the Vietnam War.
- Researchers used mixture modeling to classify lesion patterns and assessed memory performance in short-term memory (STM), semantic memory, verbal episodic memory, and visual episodic memory.
- The main finding was significant STM deficits across all brain injury groups, which persisted even with other mental health issues, while deficits in other memory types varied based on lesion location.
Article Abstract
We analyzed the effects of patterns of brain lesions from penetrating head injuries on memory performance in participants of the Vietnam Head Injury Study (Grafman et al., 1988). Classes of lesion patterns were determined by mixture modeling (L. K. Muthén & B. O. Muthén, 1998-2004). Memory performance was assessed for short-term memory (STM), semantic memory, verbal episodic memory, and visual episodic memory. The striking finding was that large STM deficits were observed in all classes of brain-injured individuals, regardless of lesion location pattern. These effects persist despite frequent concomitant effects of depressive symptomatology and substance dependence. Smaller deficits in semantic memory, verbal episodic memory, and visual episodic memory depended on lesion location, in a manner roughly consistent with the existing neuropsychological literature. The theoretical and clinical implications of the striking, seemingly permanent STM deficits in individuals with penetrating head injuries are discussed.
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| http://dx.doi.org/10.3758/pbr.15.3.521 | DOI Listing |
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