Pareidolia in Parkinson's Disease and Multiple System Atrophy

Area of Science:

• Neuroscience
• Neurology
• Psychology

Background:

• Pareidolia, the perception of meaningful objects in ambiguous visual stimuli, is frequently observed in Parkinson's disease (PD) and dementia with Lewy bodies.
• The utility of pareidolia in distinguishing PD from other parkinsonian disorders, such as multiple system atrophy (MSA), remains unclear.

Purpose of the Study:

• To investigate the diagnostic value of the noise pareidolia test (NPT) in differentiating Parkinson's disease (PD) from multiple system atrophy (MSA).
• To explore the association between pareidolia and anxiety symptoms in PD patients.

Main Methods:

• The noise pareidolia test (NPT) was administered to 40 patients with PD and 48 patients with MSA.
• Receiver operating characteristic (ROC) curve analysis was employed to assess the sensitivity and specificity of the NPT.
• Neuropsychological tests, including anxiety assessments, were compared between PD patients with and without pareidolic responses.

Main Results:

• A significantly higher number of pareidolic responses were observed in PD patients (47.5%) compared to MSA patients (18.8%) (P=0.001).
• ROC analysis indicated a sensitivity of 33% and a specificity of 98% for the NPT in differentiating PD from MSA.
• PD patients with pareidolia exhibited higher scores on the State-Trait Anxiety Inventory (STAI-state and STAI-trait) compared to those without pareidolia (P=0.044).

Conclusions:

• The noise pareidolia test (NPT) demonstrates high specificity for identifying Parkinson's disease (PD) and can aid in differentiating it from multiple system atrophy (MSA), even in the absence of visual hallucinations.
• The findings suggest a potential association between pareidolia and anxiety in patients with Parkinson's disease.