Action verbal fluency in Parkinson's patients.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Neurology

Background:

• Parkinson's disease (PD) is a neurodegenerative disorder affecting motor control.
• Cognitive impairments, including executive dysfunction, are common in PD.
• Verbal fluency tasks are used to assess executive functions.

Purpose of the Study:

• To compare the performance of non-demented Parkinson's disease patients and healthy controls on an action verbal fluency task.
• To investigate whether action verbal fluency deficits are specific to PD.
• To determine the utility of action verbal fluency tasks in assessing executive functions in PD.

Main Methods:

• A cohort of 31 non-demented Parkinson's disease patients and 61 healthy controls participated.
• Participants completed an action verbal fluency task, alongside semantic and phonemic fluency tasks.
• Cognitive impairment and behavioral dysfunction were also assessed.

Main Results:

• A significant difference was observed in action verbal fluency performance between PD patients and controls (p < 0.01).
• No significant differences were found in semantic or phonemic fluency tasks.
• Education level was the only biographical variable influencing action (verb) fluency outcomes.

Conclusions:

• Findings suggest a specific verb deficit associated with the disease mechanisms in Parkinson's disease.
• Action (verb) fluency tasks are valid measures of executive function.
• This task provides unique insights into cognitive deficits in PD not captured by traditional executive function tests.