Brain Arterial Diameters and Cognitive Performance: The Northern Manhattan Study

Area of Science:

• Neuroscience
• Radiology
• Cognitive Science

Background:

• Cognitive performance is crucial for daily functioning.
• Understanding the vascular contribution to cognitive impairment is essential for developing effective interventions.

Purpose of the Study:

• To investigate the association between brain arterial diameters and cognitive performance.
• To determine if specific arterial territories relate to domain-specific cognitive functions.

Main Methods:

• Utilized time-of-flight magnetic resonance angiogram (MRA) to measure intracranial arterial diameters in 1034 participants.
• Assessed cognitive functions including executive function, semantic memory, episodic memory, and processing speed.
• Employed adjusted generalized additive models to analyze cross-sectional and longitudinal associations.

Main Results:

• Non-linear relationships were found between left anterior cerebral artery (ACA)/middle cerebral artery (MCA) diameter and semantic memory.
• Left posterior cerebral artery (PCA)/posterior communicating artery (Pcomm) diameter was associated with episodic memory.
• Larger arterial diameters correlated with lower cognitive scores and greater cognitive decline over time.

Conclusions:

• Brain arterial diameters may influence cognitive function, potentially leading to poorer cognition.
• Further research into the mechanisms and directionality of these vascular-cognition interactions is warranted.
• Findings highlight the role of cerebrovascular health in maintaining cognitive function and preventing dementia.