What is the innervation of the larynx?
Nerve supply The larynx is innervated 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.
What nerve Innervates the larynx and pharynx?
superior laryngeal nerve
The vagus nerve is the large nerve that supplies the many branches of nerves that innervate the larynx. The superior laryngeal nerve, its external and internal branches, and the recurrent laryngeal nerve all have very distinct roles in motor and sensory innervation of the larynx.
Where does the larynx start and end?
The larynx, commonly called the voice box or glottis, is the passageway for air between the pharynx above and the trachea below. It extends from the fourth to the sixth vertebral levels.
What is the pharynx and larynx?
The throat (pharynx and larynx) is a ring-like muscular tube that acts as the passageway for air, food and liquid. It is located behind the nose and mouth and connects the mouth (oral cavity) and nose to the breathing passages (trachea [windpipe] and lungs) and the esophagus (eating tube).
What nerve supplies the pharynx?
Most sensory innervation of the pharynx is derived from the glossopharyngeal nerve, specifically the pharyngeal and tonsillar branches (cranial nerve IX), except for the anterior part of the nasopharynx, which is innervated by a branch of the maxillary nerve (cranial nerve V2) called the pharyngeal nerve.
What is innervated by the superior laryngeal nerve?
The superior laryngeal nerve, a branch of the vagus nerve, innervates the cricothyroid muscle of the larynx. This muscle stretches, tenses, and adducts the vocal cord.
Which comes first larynx or pharynx?
The larynx is located immediately below the pharynx and is formed of pieces of cartilage bound together by ligaments.
What is the infraglottic cavity?
Background. Infraglottic space, also known as infraglottic cavity, comprises the space of approximately 1 cm from the lower surface of vocal folds to the lower edge of the cricoid cartilage. Most pathological lesions, especially laryngeal tumours, originate in the area of glottis.
Which muscles are innervated by the recurrent laryngeal nerve?
The posterior cricoarytenoid muscles, the only muscles that can open the vocal folds, are innervated by this nerve. The recurrent laryngeal nerves are the nerves of the sixth pharyngeal arch.
What is the CT imaging guide for the larynx?
This CT imaging guide covers the anatomy, pathologies, trauma, and CT protocols of the larynx and laryngeal space.
What nerve innervates the larynx?
mental nerve abducens nerve (CN VI) facial nerve (CN VII) chorda tympani nerve to stapedius vestibulocochlear nerve (CN VIII) vestibular ganglion (Scarpa’s ganglion) glossopharyngeal nerve (CN IX) Jacobson nerve vagus nerve (CN X) superior laryngeal nerve external laryngeal nerve internal laryngeal nerve
What are the different types of larynx nerves?
superior laryngeal nerve external laryngeal nerve internal laryngeal nerve recurrent laryngeal nerve (inferior laryngeal nerve) non-recurrent laryngeal nerve (spinal) accessory nerve (CN XI)
What is the gross anatomy of the larynx?
Gross anatomy. The larynx consists of a cartilage “skeleton”, as well as internal structures that are divided into three subsites, mainly for the purposes of laryngeal cancer staging: supraglottis: extends from the tip of the epiglottis to the laryngeal ventricle epiglottis: divided into suprahyoid and infrahyoid portions. pre-epiglottic space.