Verbal learning and memory after childhood stroke

Area of Science:

• Neuroscience
• Pediatric Neurology
• Cognitive Psychology

Background:

• Pediatric stroke affects cognitive functions, including verbal learning and memory (VLM).
• Understanding VLM deficits is crucial for targeted interventions in children with stroke.
• Previous research often focused on adult stroke, leaving pediatric VLM profiles less characterized.

Purpose of the Study:

• To characterize verbal learning and memory (VLM) in children with a history of stroke.
• To compare VLM performance between pediatric stroke survivors and healthy controls.
• To investigate the impact of lesion hemisphere and timing on VLM in pediatric stroke.

Main Methods:

• Cross-sectional neuropsychological and neuroimaging study.
• 26 pediatric stroke subjects (ages 5-17) and 26 matched orthopedic controls.
• Utilized California Verbal Learning Test-Children (CVLT-C), IQ tests, and Digit Span for VLM, intellectual functioning, and auditory attention assessment.

Main Results:

• Stroke subjects showed significantly lower VLM, IQ, and auditory attention/working memory scores compared to controls.
• No significant VLM differences were found between left- and right-hemisphere lesions.
• Early strokes (<12 months) were linked to poorer delayed recall, reduced recognition discriminability, and worse auditory attention.

Conclusions:

• Pediatric stroke survivors exhibit significant verbal learning and memory impairments compared to peers.
• Early-onset pediatric strokes are associated with more severe recall and recognition deficits.
• Unlike adult stroke, lesion hemisphere does not significantly impact VLM outcomes in pediatric stroke survivors.