The Rapid Naming Test: Neuroanatomical validity and clinical utility

Area of Science:

• Neuroscience
• Cognitive Psychology
• Neurology

Background:

• The Rapid Naming Test (RNT) is a tablet-based confrontation naming task.
• Its utility in assessing cognitive function and neurodegenerative syndromes requires thorough evaluation.

Purpose of the Study:

• Evaluate the concurrent validity, neuroanatomical correlates, and diagnostic sensitivity of the RNT.
• Assess the RNT's discriminant validity across different neurodegenerative syndromes, including primary progressive aphasias (PPA).

Main Methods:

• Compared RNT performance in 263 healthy adults and 185 individuals with neurodegenerative syndromes.
• Correlated RNT scores with traditional cognitive tests and regional gray matter volumes via voxel-based morphometry.

Main Results:

• RNT performance correlated significantly with language, memory, executive function, and processing speed (p < 0.05).
• Associated with gray matter volume in left insula, temporal pole, fusiform, and inferior/middle temporal gyri.
• The RNT demonstrated high sensitivity to cognitive impairment (AUC = 0.90), with notable deficits in logopenic and semantic variant PPA.

Conclusions:

• The RNT is sensitive to cognitive impairment and linked to brain regions crucial for language and cognitive control, with a left-hemisphere bias.
• Findings support the RNT's construct validity and its potential for detecting mild cognitive impairment and differentiating neurodegenerative conditions.