Comparison of trigeminal lateralization with differing stimulants.

Area of Science:

• Neuroscience
• Sensory Science
• Ophthalmology

Background:

• Trigeminal nerve stimulants activate specific receptors, influencing sensory perception.
• Variability in trigeminal sensitivity across different transient receptor potential (TRP) receptors is not well understood.
• Dysfunction of TRP receptors may lead to diverse patient symptoms.

Purpose of the Study:

• To investigate trigeminal sensitivity across different TRP receptors.
• To determine if trigeminal sensitivity is consistent across various stimulants.
• To explore correlations between trigeminal sensitivity, olfaction, and patient-reported outcomes.

Main Methods:

• Prospective cohort study with 50 participants across the olfactory spectrum.
• Trigeminal lateralization testing using eucalyptol, isothiocyanate (mustard oil), and acetic acid (vinegar).
• Olfaction testing with Sniffin' Sticks and measurement of patient-reported outcome measures (PROMs).

Main Results:

• Mean trigeminal lateralization scores: eucalyptol (16.18), mustard oil (14.94), vinegar (15.28).
• Eucalyptol correlated with olfactory threshold scores; acetic acid correlated with PROMs.
• No significant correlation found between lateralization scores of different stimulants or with age.

Conclusions:

• Trigeminal sensitivity is receptor-specific, with no cross-correlation observed between tested stimulants.
• Findings suggest that sensitivity to one TRP receptor type may not predict sensitivity to others.
• Further research with TRPV1 and TRPA1 agonists is recommended to validate these findings.