The neural basis of motion sickness

Area of Science:

• Neuroscience
• Vestibular System Physiology
• Autonomic Nervous System Function

Background:

• Motion sickness has been linked to body motion for centuries.
• Recent advances have identified the neural basis and signal sources of motion sickness.
• Understanding the sensory conflict is key to managing its symptoms.

Purpose of the Study:

• To review the origins of sensory conflicts causing motion sickness.
• To summarize experimental data on motion sickness generation and control.
• To explore the neural pathways and molecular mechanisms involved.

Main Methods:

• Review of existing experimental data on motion sickness.
• Analysis of vestibular input pathways (semicircular canals, otolith organs).
• Examination of neural control mechanisms in the vestibulo-cerebellum and vestibular nuclei.

Main Results:

• Motion sickness originates from vestibular input processed by the velocity storage integrator.
• The vestibulo-cerebellum, specifically the nodulus, exerts inhibitory control over vestibular nuclei.
• GABA_B receptors play a major inhibitory role, and agonists like baclofen can suppress motion sickness.

Conclusions:

• Understanding the neural basis of sensory conflict provides insights into motion sickness.
• Targeting vestibular pathways and inhibitory mechanisms offers potential therapeutic strategies.
• Further research may lead to improved treatments for motion sickness symptoms.