How do you check cranial nerve 9 and 10?
How do you check cranial nerve 9 and 10?
Cranial Nerves 9 & 10 – Motor The motor division of CN 9 & 10 is tested by having the patient say “ah” or “kah”. The palate should rise symmetrically and there should be little nasal air escape. With unilateral weakness the uvula will deviate toward the normal side because that side of the palate is pulled up higher.
What does CN 9 do?
Motor Functions The stylopharyngeus muscle of the pharynx is innervated by the glossopharyngeal nerve. This muscle acts to shorten and widen the pharynx and elevate the larynx during swallowing.
What is the cranial nerve 10?
vagus nerve
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.
What muscles does CN 9 innervate?
The glossopharyngeal nerve (ninth cranial nerve, CN IX, latin: nervus glossopharyngeus) is a mixed cranial nerve. The glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle and the superior constrictor pharyngeal muscle.
What do cranial nerves 9 and 10 do?
CRANIAL NERVE 9 (GLOSSOPHARYNGEAL) AND CRANIAL NERVE 10 (VAGUS) CNs 9 and 10 work together to supply the musculature of the pharynx (mostly supplied by CN 10) and transmit visceral afferent information from vascular baroreceptors, and each nerve also has additional individual functions listed below.
How do you test for CN 12’s function?
12th Cranial nerve The 12th (hypoglossal) cranial nerve is evaluated by asking the patient to extend the tongue and inspecting it for atrophy, fasciculations, and weakness (deviation is toward the side of a lesion).
How do you test CN IX?
CN IX and CN X nerves can be assessed together:
- Ask the patient to cough (assessing CN X)
- Ask the patient to open the mouth wide and say ‘ah’, using a tongue depressor to visual the palate and posterior pharyngeal wall (assessing CN IX and X) The soft palate should move upwards centrally.
How do you test for Glossopharyngeal nerve damage?
After glossopharyngeal neuralgia is diagnosed, doctors may try to determine the underlying cause of the pain. Tests such as a blood test, CT scan , MRI , or X-rays may be ordered. If it is suspected that there may be problems with the blood vessels, an MR-angiogram (MRA) may also be ordered.
Where does CN IX synapse?
otic ganglion
The axons of the inferior salivatory nucleus travel in the glossopharyngeal (IX) nerve as parasympathetic efferents and synapse in the otic ganglion. The postganglionic axons of the otic ganglion innervate the parotid gland.
How do you test for glossopharyngeal nerve damage?
Where does CN 9 + 10 and CN 12 come from?
CN 9+10 are between the olive and the inferior cerebellar peduncle. CN 11 projects from the spinal cord (but does traffic through the jugular foramen with CN9 and CN10). CN 12 comes more medially and anteriorly from the same level as CN 9 (inferior to the pyramid, above the olive).
How does CNS 9 and 10 work together?
CNs 9 and 10 work together to supply the musculature of the pharynx (mostly supplied by CN 10) and transmit visceral afferent information from vascular baroreceptors, and each nerve also has additional individual functions listed below.
What are the functions of the CN 10?
The functions of CN 10 include: Motor supply to all muscles of the larynx and pharynx except tensor veli palitini (CN 5), mylohyoid (CN 5), stylohyoid (CN 7), stylopharyngeus (CN 9) Motor supply to one muscle of the tongue: palatoglossus (all others are innervated by CN 12)
How are cranial nerves 9 and 10 related?
CRANIAL NERVE 9 (GLOSSOPHARYNGEAL) AND CRANIAL NERVE 10 (VAGUS) CN 9 and CN 10 are discussed together since they are difficult to isolate clinically, and are commonly affected together since they both communicate with nuclei in the dorsolateral medulla, both pass through the jugular foramen, and they are adjacent throughout parts of the neck.