What is cranial nerve IX and X?

The glossopharyngeal (IX) and vagus (X) nerves mediate the complex interplay between the many functions of the upper aerodigestive tract. Swallowing, breathing, and communicating all rely on delicate interactions between the sensory inputs and motor outputs of many of the cranial nerves.

What do cranial nerves IX and X innervate in the mouth?

With a few exceptions, it supplies all the muscles of the soft palate, pharynx, and larynx, in addition to the structures in the pulmonary, gastrointestinal, and cardiovascular systems previously mentioned. Its ganglia are the nodose and jugular.

What is cranial nerve number X?

The vagus nerve (cranial nerve [CN] X) is the longest cranial nerve in the body, containing both motor and sensory functions in both the afferent and efferent regards.

How do you test cranial nerves IX and X?

Cranial Nerves IX and CN X Testing Procedures – Motor function and clarity of speech. Listen to the patient speak and note clarity and presence of any hoarseness of voice. Ask the patient to say “ah” while observing for symmetrical movement of the soft palate. Document normal or abnormal responses.

What is cranial nerve VII?

The facial nerve is the seventh cranial nerve (CN VII). The facial nerve provides motor innervation of facial muscles that are responsible for facial expression, parasympathetic innervation of the glands of the oral cavity and the lacrimal gland, and sensory innervation of the anterior two-thirds of the tongue.

What is Cranial nerve XI?

Introduction. The accessory spinal nerve or XI cranial nerve is essential for neck and shoulder movement, the intrinsic musculature of the larynx, and the sensitive afferences of the trapezius and sternocleidomastoid musculature.

Where is cranial nerve VII?

The facial nerve (the labyrinthine segment) is the seventh cranial nerve, or simply CN VII. It emerges from the pons of the brainstem, controls the muscles of facial expression, and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue.