Exposure to odours improves olfactory function in healthy children.

Area of Science:

• Neuroscience
• Sensory Science
• Otolaryngology

Background:

• Olfactory training, or short-term odour exposure, is known to enhance olfactory function.
• This benefit extends to both healthy individuals and those with olfactory dysfunction.

Purpose of the Study:

• To investigate the impact of twice-daily, short-term exposure to four distinct odours over 12 weeks on olfactory function.
• To compare olfactory abilities between a group undergoing olfactory training and a control group.

Main Methods:

• A prospective, controlled study involving an olfactory training (TR) group and a non-training (noTR) group.
• Participants in the TR group were exposed to "rose", "eucalyptus", "lemon", and "clove" odours twice daily.
• Olfactory function, including odour identification and thresholds, was assessed using the "Sniffin' Sticks" test before and after the 12-week intervention.

Main Results:

• No significant baseline differences in age or olfactory sensitivity were observed between the groups.
• The TR group demonstrated significantly improved odour thresholds for all tested odours compared to the noTR group after 12 weeks.
• The TR group also showed superior odour identification performance over the noTR group.

Conclusions:

• Repeated odour exposure appears to enhance general olfactory sensitivity.
• Olfactory training may be a beneficial intervention for improving smell function.