Editing Larynx (section)

===Nerve supply===
The larynx is [[innervate]]d by branches of the [[vagus nerve]] on each side. Sensory innervation to the glottis and laryngeal vestibule is by the internal branch of the [[superior laryngeal nerve]]. The external branch of the superior laryngeal nerve innervates the [[cricothyroid muscle]].  Motor innervation to all other muscles of the larynx and sensory innervation to the subglottis is by the [[recurrent laryngeal nerve]]. While the sensory input described above is (general) visceral sensation (diffuse, poorly localized), the vocal cords also receives general somatic sensory innervation (proprioceptive and touch) by the superior laryngeal nerve.

Injury to the external branch of the superior laryngeal nerve causes weakened phonation because the vocal cords cannot be tightened. Injury to one of the recurrent laryngeal nerves produces [[hoarseness]], if both are damaged the voice may or may not be preserved, but breathing becomes difficult.