Vagus n. (CN X)

Question 1

Branches in the jugular fossa

-auricular

Answer 1

function- sensory innervation of the skin of the external auditory meatus and ear

Question 2

Branches in the neck & mediastinum

-Pharyngeal (plexus)

Answer 2

function- sensory & motor [nucleus ambiguus of the medulla] innervation of the all the muscles of the pharynx [except the stylopharyngeus] and the palate [except the tensor palatini]

Question 3

Branches in the neck & mediastinum

-Carotid n.

Answer 3

function- sensory innervation of the carotid sinus and body

Question 4

Branches in the neck & mediastinum

-Superior laryngeal

Answer 4

i. Internal laryngeal n. (sensory)
function- sensory to the mucosa of the oral & laryngeal pharynx, epiglottis and larynx and taste to epiglottis

ii. External laryngeal n. (motor)
function- motor innervation of the cricothyroid, and inferior constrictor muscles

Question 5

Branches in the neck & mediastinum

-Recurrent laryngeal n.

Answer 5

function- sensory motor innervation of all but two of the muscles of the larynx; sensory innervation of the mucosa of the trachea and larynx