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Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage
Published on: August 30, 2020
Free recall memory performance after aneurysmal subarachnoid hemorrhage.
Signy Sheldon1, R Loch Macdonald, Tom A Schweizer
1Labatt Family Centre of Excellence in Brain Injury and Trauma Research, Keenan Research Centre of the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada. signy.sheldon@utoronto.ca
Journal of the International Neuropsychological Society : JINS
|February 14, 2012
Summary
Survivors of aneurysmal subarachnoid hemorrhage (SAH) experience memory issues, particularly with unorganized information. This suggests executive function impairments, especially for anterior communicating artery ruptures, impacting memory recall.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neurology
Background:
- Memory deficits are common in aneurysmal subarachnoid hemorrhage (SAH) survivors.
- The specific nature of these cognitive impairments remains poorly understood.
Purpose of the Study:
- To investigate the nature of memory deficits in SAH survivors.
- To differentiate between memory recall for organized versus unorganized information.
- To explore the role of executive functions in SAH-related memory impairment.
Main Methods:
- 24 SAH patients and matched controls studied word lists.
- Lists were either organized by category or unorganized (randomized).
- Intrusions (recalling words from other lists) were monitored.
Main Results:
- SAH patients recalled fewer words from unorganized lists compared to controls.
- SAH patients exhibited more intrusions than controls.
- Anterior communicating artery (ACoA) ruptures were associated with deficits primarily in unorganized list recall.
Conclusions:
- Memory impairment after SAH is likely due to deficits in executive memory components.
- ACoA ruptures are particularly linked to executive memory dysfunction.
- Findings may inform future cognitive rehabilitation strategies for SAH survivors.
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