Deciphering Cognitive Impairments in Huntington's Disease: A Comparative Study of Stroop Test Variations

Area of Science:

• Neuroscience
• Neurology
• Cognitive Science

Background:

• Huntington's disease (HD) is a neurodegenerative disorder causing cognitive, motor, and behavioral impairments.
• The Stroop Color Word Test (SCWT) is a standard cognitive assessment tool for HD.
• Different SCWT formats (horizontal vs. vertical) may yield varying results due to HD's effects on cognition and eye movements.

Purpose of the Study:

• To compare the efficacy of horizontal and Golden vertical SCWT formats in identifying cognitive decline in HD patients.
• To investigate the influence of oculomotor abnormalities on SCWT performance in HD.

Main Methods:

• Forty-five genetically confirmed HD participants completed both horizontal and Golden vertical SCWT formats in a counterbalanced order.
• Performance was standardized using two different norms, and raw/normed scores were analyzed.
• Scores were correlated with eye movement ratings from the Unified Huntington's Disease Rating Scale.

Main Results:

• The Golden vertical SCWT resulted in significantly slower responses, especially in the Word Reading section, across both norms.
• Statistical analysis confirmed significant performance disparities between the two SCWT formats.
• Strong correlations were found between vertical eye movement ratings and Golden SCWT performance, indicating oculomotor influence.

Conclusions:

• Test format is crucial for accurate cognitive assessment in HD.
• The Golden vertical SCWT shows enhanced sensitivity for detecting cognitive deficits in HD, potentially due to vertical saccade abnormalities.
• Findings aid in refining cognitive assessments and monitoring HD progression.