The caudal (recurrent) laryngeal nerve innervates the mucous membrane caudal to the vestibule and vocal folds. The cricothyroideus muscle is innervated by the cranial laryngeal nerve[r]
(1)(2)(3)(4)Laryngeal Cartilages Cricoid cartilage Lamina Articular facets Rostral -arytenoid Caudal -thyroid Arch Cricotracheal ligament Thyroid cartilage Laminae (2)
Caudal cornu (horn) Rostral cornu
(5)Laryngeal Cartilages 2
(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)Cavities of the Larynx
Entrance (inlet, aditus) Apex, upper border, epiglottis
Aryepiglottic folds Interarytenoid fold
Vestibule – rostral to the glottis
Piriform recess
(21)(22)Ligaments: Cricothyroid Vocal
Vestibular
(23)Muscles of the Larynx
M cricothyroideus (paired) – cranial laryngeal nerve M. cricoarytenoideus dorsalis (paired) – opens glottis
(24)Mucous membrane Vocal fold (11)
(25)Cavities of the larynx
Entrance (inlet, aditus) Vestibule
Rimma glottidis (glottic cleft) Intermembranous
(26)Nerve Supply
The internal laryngeal branch of the cranial laryngeal nerve
innervates the mucous membrane of the vestibule
A Cranial laryngeal nerve is a branch of the vagus nerve B Internal branch enters the larynx by passing between the thyrohyoid bone and the thyroid cartilage
C This nerve also carries autonomic fibers to the glands and blood vessels of the laryngeal vestibule
The caudal (recurrent) laryngeal nerve innervates the mucous membrane caudal to the vestibule and vocal folds
The cricothyroideus muscle is innervated by the cranial laryngeal nerve
(27)