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Hemispatial neglect and serial order in verbal working memory
Sophie Antoine1, Mariagrazia Ranzini1, Jean-Philippe van Dijck2
1Center for Research in Cognition and Neurosciences, ULB Neuroscience Institute, Free University of Brussels, Belgium.
Journal of Neuropsychology
|January 10, 2018
Summary
Patients with hemispatial neglect show impaired verbal working memory for the order of information, suggesting spatial cognition underpins serial order processing. This deficit relates to neglect severity and right posterior brain damage.
Area of Science:
- Cognitive Neuroscience
- Neuropsychology
Background:
- Working memory involves maintaining and processing information, with serial order often critical for performance.
- Recent theories propose that serial order processing is fundamentally linked to spatial cognition.
Purpose of the Study:
- To investigate the relationship between spatial cognition and verbal working memory, specifically serial order processing.
- To compare the performance of right hemisphere-damaged patients with hemispatial neglect to healthy controls on verbal working memory tasks.
Main Methods:
- Participants memorized consonant sequences and performed item and order judgment tasks.
- Hemispatial neglect patients and healthy controls were compared on their ability to recall item identity versus serial order.
Main Results:
- Neglect patients made significantly more errors in the order task compared to the item task relative to controls.
- The deficit in serial order processing was correlated with neglect severity and more common with right posterior brain damage.
- This impairment in serial order working memory was not lateralized.
Conclusions:
- Findings support the hypothesis that spatial cognition is crucial for processing the serial order of verbal information.
- Potential mechanisms include reduced spatial working memory capacity or spatial compression of positional codes in neglect patients.
- The study highlights a specific deficit in serial order processing within verbal working memory in patients with hemispatial neglect.
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