Sensory nerve supply to the laryngeal mucosa is provided by__________________?
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Answer: B. Internal laryngeal and recurrent laryngeal
Explanation
Sensory innervation of the laryngeal mucosa is supplied by the internal laryngeal nerve and the recurrent laryngeal nerve. The internal laryngeal nerve carries sensory fibers from the laryngeal vestibule and vocal folds. The recurrent laryngeal nerve supplies sensory input from the subglottic region down to the upper trachea. The vagus nerve provides all sensory and motor innervation to the internal structures of the human larynx. The superior laryngeal nerve divides into internal and external branches supplying sensation and cricothyroid motor function. Mucosal receptors within the laryngeal airway are extremely sensitive to touch, pressure, and chemical irritants.
The external laryngeal nerve is strictly a motor nerve innervating the cricothyroid muscle with no sensory fibers. The superior laryngeal nerve as a whole includes the external motor branch, making the specific pairing incorrect. Isolating only the internal laryngeal nerve leaves out the vital subglottic sensory contribution from the recurrent nerve.
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