Changes in saccadic eye movement (SEM) and quantitative EEG parameter in bipolar patients.

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Science

Background:

• Neurocognitive dysfunction is increasingly linked to Bipolar Disorder states.
• Gamma coherence is crucial for cognitive processes and brain communication.
• Understanding gamma coherence changes in bipolar disorder is vital.

Purpose of the Study:

• To investigate cortical gamma coherence in bipolar patients versus controls during a prosaccadic attention task.
• To explore gamma coherence as a neural mechanism underlying information processing in bipolar disorder.

Main Methods:

• Quantitative electroencephalography (20 channels) was used to record brain activity.
• Thirty-two participants (20 bipolar patients, 12 controls) performed a prosaccadic attention task.

Main Results:

• The manic group exhibited shorter saccade latency compared to depression and control groups.
• Healthy controls showed greater gamma coherence in the right frontal and motor cortices during the task.
• Bipolar patients, particularly in mania, displayed disrupted brain connectivity and cortical inhibitory mechanisms.

Conclusions:

• Gamma coherence alterations may indicate cognitive dysfunction in the manic state of bipolar disorder.
• Findings suggest disrupted brain connectivity and deregulation of cortical inhibitory mechanisms in mania.
• Gamma coherence could serve as a potential biomarker for cognitive deficits in bipolar disorder.