Non-Invasive Neuromodulation Using Time-Varying Caloric Vestibular Stimulation

Area of Science:

• Neuroscience
• Medical Devices
• Neuromodulation

Background:

• Caloric Vestibular Stimulation (CVS) is used for diagnosing balance disorders and assessing brainstem function.
• Existing CVS devices have limitations for therapeutic applications and home use due to short durations and reliance on water/air.
• Previous research suggests therapeutic potential for CVS, but device limitations have hindered its application.

Purpose of the Study:

• To develop and evaluate a novel solid-state CVS device for therapeutic neuromodulation.
• To investigate the physiological effects of time-varying thermal waveforms in CVS.
• To assess the feasibility and safety of longitudinal home-based CVS for episodic migraine treatment.

Main Methods:

• Development of a programmable, solid-state CVS device with safety features.
• Administration of CVS with time-varying and constant temperature waveforms.
• Measurement of cerebral blood flow changes to assess neuromodulation.
• Pilot study involving longitudinal home use of the device for episodic migraine.

Main Results:

• Time-varying CVS waveforms induced changes in cerebral blood flow, suggesting brainstem neuromodulation.
• Constant temperature waveforms did not elicit similar physiological changes.
• The solid-state CVS device was demonstrated to be safe and feasible for home use in a pilot study for episodic migraine.
• The device allows for controlled thermal waveforms and prevents extreme temperatures.

Conclusions:

• Solid-state CVS with time-varying thermal waveforms can modulate brainstem centers.
• This novel device offers a viable platform for non-invasive neuromodulation.
• The device shows promise for safe and effective longitudinal home treatment of episodic migraine.