Frontiers | Domain-driven verbal and non-verbal dissociations in cognition and social cognition in Parkinson’s disease

May 21, 2026 - 13:43

Beyond the well-known motor symptoms, Parkinson's disease also impacts cognition and social cognition, often before significant cognitive decline is apparent. A new study explores how verbal and non-verbal abilities separate in these areas, even in patients who are still considered cognitively intact.

The research highlights that people with PD can show distinct patterns of impairment. For example, a person might struggle with verbal memory or language-based reasoning while retaining strong non-verbal skills like spatial awareness or facial emotion recognition. Conversely, others may show the opposite profile. These dissociations suggest that different neural circuits are affected at different stages of the disease, rather than a uniform cognitive decline.

In social cognition, the study found that understanding others' emotions through verbal cues, such as tone of voice, can be preserved even when non-verbal social signals, like interpreting body language or facial expressions, are impaired. This points to a domain-specific breakdown in the brain's social processing networks.

These findings are important for clinical assessment. Standard cognitive tests often lump verbal and non-verbal tasks together, potentially masking specific deficits. By identifying these dissociations early, clinicians could tailor interventions more precisely. For instance, a patient with intact non-verbal social skills might benefit from visual communication aids, while another with strong verbal abilities could rely on written instructions. The study underscores that Parkinson's disease is not a single cognitive syndrome but a collection of potentially independent domain-specific challenges that require careful, individualized evaluation.