Association between P300 parameters and cognitive function in people with diabetic neuropathy.

Area of Science:

• Neuroscience
• Clinical Medicine
• Psychology

Background:

• Diabetic peripheral neuropathy (DPN) is a common complication of type 2 diabetes mellitus (T2DM).
• Cognitive dysfunction is increasingly recognized as a significant comorbidity in individuals with DPN.
• Understanding the neural underpinnings of cognitive impairment in DPN is crucial for developing targeted interventions.

Purpose of the Study:

• To investigate the association between event-related potential (ERP) P300 characteristics and cognitive function in patients with DPN.
• To explore the relationship between P300 measures and dual-task performance in this population.

Main Methods:

• A cross-sectional analysis was conducted on 19 T2DM patients with DPN.
• Neuropathy was assessed using the diabetic neuropathy symptom score (DNSS) and vibration perception threshold (VPT).
• Cognitive function was evaluated using the Mini-mental state examination (MMSE) and trail making test-B (TMT-B), alongside P300 latency and amplitude measurements. Dual-task cost (DTC) was calculated using the timed-up and go (TUG) and TUG with dual task (TUG-DT) tests.

Main Results:

• P300 latency showed a linear relationship with TMT-B (R=0.31, p=0.01) and DTC (R=0.22, p=0.04).
• P300 amplitude was also associated with TMT-B (R=0.13, p=0.04) and DTC (R=0.67, p=0.001).
• No significant relationship was found between MMSE scores and P300 latency or amplitude.

Conclusions:

• P300 latency and amplitude are associated with cognitive function, specifically executive function and attention, as measured by TMT-B and DTC in individuals with DPN.
• These findings suggest that P300 may serve as a neurophysiological marker for cognitive deficits in DPN.