Prepulse inhibition in euthymic bipolar disorder patients in comparison with control subjects

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Science

Background:

• Deficient sensorimotor gating, measured by prepulse inhibition (PPI), is observed in neuropsychiatric disorders.
• Sensorimotor gating deficits may be a feature of bipolar disorder.

Purpose of the Study:

• To investigate sensorimotor gating deficits in patients with euthymic bipolar disorder.
• To explore the relationship between PPI and clinical, functional, and cognitive measures in bipolar disorder.

Main Methods:

• Prepulse inhibition (PPI) was measured in 64 euthymic bipolar patients and 64 controls.
• Clinical assessments included HDRS, YMRS, and FAST.
• Cognitive function was evaluated using the MCCB and Stroop test.

Main Results:

• Bipolar patients exhibited PPI deficits at 60- and 120-ms prepulse-pulse intervals compared to controls.
• In bipolar patients, PPI correlated with the social cognition domain of the MCCB.
• No significant correlations were found between PPI and other clinical, functional, or neurocognitive variables.

Conclusions:

• PPI deficits represent a potential neurobiological marker in euthymic bipolar disorder.
• The PPI deficit in bipolar disorder is associated with social cognition deficits.
• PPI is not significantly correlated with other clinical, functional, or cognitive measures in this population.