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An olfactory-submandibular salivary reflex in humans
1Biomedical Sciences Division, King's College London, Strand.
Experimental Physiology
|January 1, 1992
Summary
A new study reveals that smelling appetizing food triggers a salivary reflex in humans. This olfactory-submandibular salivary reflex demonstrates a direct link between scent and saliva production.
Area of Science:
- Physiology
- Neuroscience
- Sensory Science
Background:
- Previous research suggested no olfactory-parotid salivary reflex in humans.
- The existence of an olfactory-submandibular salivary reflex remained unexamined.
Purpose of the Study:
- To investigate the presence and nature of the olfactory-submandibular salivary reflex in humans.
- To determine if olfactory stimulation influences submandibular salivary secretion.
Main Methods:
- Nine human subjects participated in the study.
- Bilateral submandibular saliva was collected using custom devices.
- Salivary flow was measured in response to various appetizing odors (peppermint, vanilla, chocolate, beef, tomato, lemon) and distilled water.
Main Results:
- A significant increase in submandibular salivary flow was observed in response to all tested appetizing odors.
- No significant salivary flow increase was detected in response to distilled water.
Conclusions:
- The study provides evidence for the existence of an olfactory-submandibular salivary reflex in humans.
- Appetizing odors can directly stimulate submandibular salivary secretion, challenging previous assumptions about olfactory-salivary reflexes.