Sleep-Wake Rhythm and Oscillatory Pattern Analysis in a Multiple Hit Schizophrenia Rat Model (Wisket)

Area of Science:

• Neuroscience
• Chronobiology
• Psychiatry

Background:

• Schizophrenia is associated with circadian rhythm and brain oscillatory impairments.
• These alterations may underlie cognitive and sensory processing deficits.

Purpose of the Study:

• To investigate circadian rhythm and state-dependent oscillatory patterns in a Wisket rat model of schizophrenia.
• To compare these patterns with control Wistar rats.

Main Methods:

• Utilized custom software for artifact identification and sleep-wake stage classification.
• Analyzed electroencephalography (EEG) data for oscillatory power across different frequency bands.
• Compared Wisket rats with control Wistar rats.

Main Results:

• Wisket rats showed a tendency towards more non-rapid eye movement (NREM) sleep and less rapid eye movement (REM) sleep.
• Wisket rats exhibited higher power in delta, alpha, and beta bands and lower power in theta and gamma bands.
• Significant differences were most pronounced during the active waking substage.

Conclusions:

• Schizophrenia rat models display distinct changes in brain oscillatory patterns.
• These oscillatory alterations, especially during active wakefulness, may contribute to cognitive impairments in schizophrenia.