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The vagus nerve is composed of many different types of nerve fibre including '''general somatic efferent fibres''' supplying motor function to the muscles of the larynx, pharynx, palate and oesophagus; '''general visceral afferent fibres''' to the base of the tongue, pharynx and larynx; '''general visceral efferent fibres''' for parasympathetic supply of the thoracic and abdominal viscera; '''special visceral afferent fibres''' supplying taste to regions of the epiglottis and palate and finally '''general somatic afferent fibres''' to the external ear and the dura mater.

The vagus nerve is composed of many different types of nerve fibre including '''general somatic efferent fibres''' supplying motor function to the muscles of the larynx, pharynx, palate and oesophagus; '''general visceral afferent fibres''' to the base of the tongue, pharynx and larynx; '''general visceral efferent fibres''' for parasympathetic supply of the thoracic and abdominal viscera; '''special visceral afferent fibres''' supplying taste to regions of the epiglottis and palate and finally '''general somatic afferent fibres''' to the external ear and the dura mater. The vagus nerve also supplies '''general somatic afferent fibres''' and '''special visceral afferent fibres''' to the root of the tongue.

There are many functional components of the vagus nerve including the heart, larynx, pharynx and many other viscera. On clinical examination any changes related to gag reflexes, blood pressure or heart rate, changes in 'voice' or inspiratory dyspnoea may indicate a problem with the vagus nerve.

===Accessory nerve (XI)===

===Accessory nerve (XI)===