Emotion perception and electrophysiological correlates in Huntington's disease.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Neurology

Background:

• Huntington's disease (HD) is a neurodegenerative disorder affecting motor, cognitive, and emotional functions.
• Emotion perception deficits are common in symptomatic HD, but their underlying neural mechanisms remain unclear.

Purpose of the Study:

• To characterize emotion perception deficits in symptomatic HD using event-related potentials (ERPs).
• To investigate whether deficits are related to generalized visual processing or face/emotion-specific processing.

Main Methods:

• ERP data were collected during a facial expression task in 11 HD participants and 11 controls.
• Facial expression classification accuracy and intensity ratings were assessed.
• Relationships between ERP indices and clinical disease characteristics were examined.

Main Results:

• HD participants had significantly lower accuracy for neutral, angry, and disgust faces compared to controls.
• Reduced amplitudes in early visual processing (P100, N170) were observed in HD.
• Later emotion processing amplitudes (N250) and specific emotion/face derivations did not differ between groups.

Conclusions:

• Emotion perception deficits in HD stem from generalized visual processing impairments, not face or emotion-specific deficits.
• ERPs are valuable tools for identifying distinct functional impairments in HD and may serve as biomarkers for disease progression.