The efferent limb of the glottic closure reflex, which is involved in laryngospasm, primarily involves the
ExplanationC. The efferent limb of the glottic closure reflex involved in laryngospasm is primarily mediated by the recurrent laryngeal nerve (RLN), while the afferent limb is mediated by the superior laryngeal nerve (SLN). The RLN innervates all of the muscles of the larynx except the cricothyroid muscle. The external branch of the SLN (not one of the listed options) is a motor nerve that innervates the cricothyroid muscle. The cricothyroid muscle contributes to laryngospasm by lengthening, and thus tensing the vocal cords.
