Selective REM sleep restriction in mice using a device designed for tunable somatosensory stimulation

Area of Science:

• Neuroscience
• Sleep Science
• Animal Models

Background:

• Sleep perturbation is crucial for understanding sleep-wake dynamics and the role of sleep in health and disease.
• Current methods for sleep perturbation in preclinical models lack throughput, flexibility, and specificity.

Purpose of the Study:

• To develop a novel system for controlled and selective sleep perturbation using vibro-tactile somatosensory stimulation.
• To investigate the efficacy of this system in interrupting REM sleep in mice.

Main Methods:

• A vibro-tactile stimulation system was designed with tunable frequency and intensity.
• The system was employed in a closed-loop manner to selectively interrupt REM sleep in mice within a standard home cage.
• Stimulation parameters were adjusted to achieve varying degrees of sleep perturbation.

Main Results:

• Vibro-tactile stimulation effectively and selectively interrupted REM sleep, reducing REM bout duration.
• Repeated REM sleep interruption led to a quicker return to REM sleep, indicating homeostatic responses.
• The observed effects were dependent on the applied stimulation parameters.

Conclusions:

• The developed vibro-tactile stimulation system offers a non-invasive, flexible, and specific method for sleep perturbation in preclinical models.
• This technology allows for graded control over sleep perturbation within a standard home cage, minimizing environmental stress.
• The system's adaptability and precision enhance its utility for sleep research and potentially other applications.