The Association between Montreal Cognitive Assessment Memory Scores and Hippocampal Volume in a Neurodegenerative...

Area of Science:

• Neuroscience
• Cognitive Neurology
• Medical Imaging

Background:

• The Montreal Cognitive Assessment (MoCA) is widely used for cognitive screening.
• Neuroanatomical correlates of MoCA performance remain under-investigated.
• Hippocampal volume is a key indicator of memory function and atrophy.

Purpose of the Study:

• To investigate the neuroanatomical correlates of the MoCA, specifically focusing on hippocampal volume.
• To determine if MoCA memory scores correlate with hippocampal size in patients with cognitive complaints.

Main Methods:

• A cohort of 138 patients with cognitive complaints underwent MoCA testing.
• Magnetic resonance imaging (MRI) was used to measure hippocampal volumes.
• Statistical analyses were performed to correlate MoCA memory scores with hippocampal volumes.

Main Results:

• Significant correlations were found between lower MoCA memory scores and smaller hippocampal volumes (r=0.36-0.41, p<0.001).
• A newly developed memory index score did not significantly improve prediction of hippocampal volume compared to the standard delayed recall score.

Conclusions:

• Poor performance on the MoCA memory section is associated with reduced hippocampal volume.
• These findings suggest that MoCA memory deficits may indicate hippocampal atrophy.
• Further evaluation for hippocampal atrophy is recommended for patients with low MoCA memory scores.