How does aging affect swallow timing and efficiency?

• A. Delayed swallow initiation, reduced pharyngeal peristalsis, decreased tongue base retraction, and reduced laryngeal elevation.
• B. Faster swallow initiation and stronger tongue base retraction.
• C. No change in swallow timing with aging.
• D. Improved airway protection.

Answer: (A)

Age-related changes in swallowing, or presbyphagia, slow down and weaken the swallow process. As people age, sensory input that triggers the swallow can become less sharp, leading to a delayed swallow initiation. The pharyngeal muscles also lose some efficiency, so the swallow’s peristaltic wave is reduced and bolus propulsion through the pharynx is less effective. The tongue base retraction—the action that helps push the bolus back and toward the esophagus—tends to be diminished, and laryngeal elevation during swallowing is decreased, which compromises airway protection and the timing of the swallow. Together, these changes make swallow timing longer and reduce overall efficiency, often resulting in more residue and a higher risk of penetration or aspiration, particularly in older adults or those with additional risk factors. This aligns with the described pattern of delayed initiation, reduced pharyngeal propulsion, weaker tongue base retraction, and lower laryngeal elevation.