Is there a relationship between odors and motion sickness?

Area of Science:

• Neuroscience
• Sensory Perception
• Vestibular System

Background:

• Motion sickness is a common condition affecting individuals during motion.
• Olfactory perception plays a role in various physiological and psychological responses.
• The interplay between olfactory stimuli and motion sickness remains incompletely understood.

Purpose of the Study:

• To investigate the relationship between olfactory stimulation and motion sickness.
• To determine if odor pleasantness or unpleasantness affects motion sickness severity.
• To assess the impact of motion sickness induction on olfactory perception.

Main Methods:

• 18 participants underwent off vertical axis rotation (OVAR) with olfactory stimulation (limonene, petrol, or control).
• Motion sickness was assessed before, during, and after OVAR sessions.
• Participants rated odor intensity and hedonic valence pre- and post-OVAR.

Main Results:

• OVAR consistently increased motion sickness symptoms.
• Neither pleasant nor unpleasant odors altered motion sickness occurrence compared to the control.
• OVAR significantly increased odor intensity, particularly for unpleasant odors.
• OVAR intensified the unpleasantness of negative odors and slightly enhanced the pleasantness of limonene.

Conclusions:

• Olfactory stimuli do not appear to influence the development of motion sickness.
• Nauseogenic stimulation via OVAR significantly impacts olfactory perception, altering intensity and hedonic valence.
• Further research is needed to fully elucidate the complex relationship between sensory inputs and motion sickness.