Relationship between vertical hyoid bone position and swallowing function in older adults

Area of Science:

• Gerontology
• Swallowing Physiology
• Biomechanics

Background:

• Hyoid bone position is a critical factor in swallowing mechanics.
• Altered hyoid bone position can influence swallowing function, particularly in aging populations.
• Understanding these relationships is vital for maintaining oral intake in older adults.

Purpose of the Study:

• To investigate the impact of a lowered hyoid bone position on the swallowing function of healthy older adults.
• To determine if hyoid bone position correlates with specific measures of swallowing performance.
• To explore potential sex-based differences in these relationships.

Main Methods:

• Sixty healthy older adults were categorized into 'High' and 'Low' hyoid bone position groups.
• Swallowing function was assessed using the Repetitive Saliva Swallow Test (RSST), Eating Assessment Tool (EAT-10), jaw-opening force (JOF), and tongue pressure (TP).
• Relationships between hyoid position and swallowing metrics were analyzed, with comparisons between sexes in the 'Low' group.

Main Results:

• Older males in the 'Low' hyoid group exhibited significantly higher jaw-opening force (JOF) when their RSST score was 5 or greater.
• No significant differences in swallowing function measures were found for females in the 'Low' hyoid group based on RSST scores.
• These findings suggest a potential link between JOF and swallowing efficiency in males with specific hyoid positioning.

Conclusions:

• Jaw-opening force appears to be a relevant factor influencing swallowing function in older males with a lowered hyoid bone position.
• The study highlights potential sex-specific biomechanical influences on swallowing in aging.
• Further research may elucidate the precise mechanisms linking hyoid position, JOF, and dysphagia risk.