Superior laryngeal nerve
Superior Laryngeal Nerve
The Superior Laryngeal Nerve (pronunciation: suh-peer-ee-or luh-rin-jee-ul nerv) is a branch of the Vagus Nerve, which is the tenth cranial nerve.
Etymology
The term 'Superior Laryngeal Nerve' is derived from the Latin words 'superior' meaning 'higher', 'laryngeal' referring to the 'larynx' or the voice box, and 'nervus' meaning nerve.
Anatomy
The Superior Laryngeal Nerve originates from the Vagus Nerve and descends into the neck. It divides into two branches: the Internal Laryngeal Nerve and the External Laryngeal Nerve. The Internal Laryngeal Nerve provides sensory innervation to the larynx above the vocal cords, while the External Laryngeal Nerve supplies the cricothyroid muscle, aiding in the tension and lengthening of the vocal cords.
Function
The Superior Laryngeal Nerve plays a crucial role in speech and swallowing. It provides sensory innervation to the larynx and motor innervation to the cricothyroid muscle, which controls the tension and length of the vocal cords.
Related Terms
- Vagus Nerve: The tenth cranial nerve that supplies the Superior Laryngeal Nerve.
- Internal Laryngeal Nerve: A branch of the Superior Laryngeal Nerve that provides sensory innervation to the larynx.
- External Laryngeal Nerve: A branch of the Superior Laryngeal Nerve that provides motor innervation to the cricothyroid muscle.
External links
- Medical encyclopedia article on Superior laryngeal nerve
- Wikipedia's article - Superior laryngeal nerve
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