During the pharyngeal phase, which set of processes are involved?

• A. Trigeminal sensory input only
• B. Soft palate elevation, pharyngeal constrictors, hyoid/laryngeal elevation, and airway protection
• C. Cricoid pressure and esophageal peristalsis
• D. Lip closure and mandibular movements

Answer: (C)

The pharyngeal phase is marked by a coordinated protective and propulsive action through the pharynx. The soft palate elevates to seal off the nasopharynx, preventing nasal regurgitation. The pharyngeal constrictor muscles contract in sequence to push the bolus downward. Meanwhile, the hyoid and larynx elevate and move forward, which helps open the upper esophageal sphincter and protects the airway as the epiglottis closes and the true vocal folds come together to guard the airway. Esophageal peristalsis occurs later, in the esophagus, after the bolus passes into it. Cricoid pressure is not a normal part of the swallow but rather a maneuver used in airway management, and lip closure plus mandibular movements belong to the oral phase, not the pharyngeal phase. Trigeminal input contributes to sensation, but the pharyngeal phase relies on coordinated input from multiple cranial nerves and these specific actions together define it.