Preliminary exploration for evaluating acuity of oral texture perception

Area of Science:

• Sensory Science
• Neuroscience
• Food Science

Background:

• Oral texture perception is vital for feeding and nutrition but lacks clinical evaluation methods.
• Impaired texture perception can affect nutritional intake and overall health.
• Current understanding of oral texture perception acuity is limited.

Purpose of the Study:

• To establish a reliable method for evaluating oral texture perception acuity.
• To investigate the correlation between different aspects of oral texture perception.
• To explore the relationship between oral texture perception and tongue mechanical sensitivity.

Main Methods:

• Developed discrimination tests using three types of test foods with varying textures and concentrations.
• Employed the up-down staircase method to determine discrimination thresholds.
• Assessed correlations between texture perception thresholds and tongue mechanical sensitivity measures (tactile, two-point, graininess discrimination).

Main Results:

• Significant correlations were found among discrimination thresholds for different food textures, indicating consistent texture perception abilities.
• Lower oral texture perception acuity was observed in individuals with reduced tongue mechanical sensitivity.
• The study successfully demonstrated that oral texture perception can be quantified.

Conclusions:

• Oral texture perception acuity can be reliably evaluated using specific discrimination tests and appropriate food stimuli.
• Texture perception is linked to the integrity of the oral sensorimotor system, including tongue sensitivity.
• This research provides a foundation for developing clinical protocols to assess oral texture perception deficits.