| Cranial Nerve Swallowing Function | IX- Glossopharyngeal Sensation and taste to posterior 1=3 of tongue | X- Vagus Sensation to larynx, motor function to soft palate, pharynx, larynx, and esophagus | XII- Hypoglossal Motor innervation to intrinsic and extrinsic tongue musculature |
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Which cranial nerve does palate elevation?
Sensory innervation of the palate is derived from the maxillary branch of the trigeminal nerve (CN V) . The greater palatine nerve innervates most of the glandular structures of the hard palate.
What cranial nerve controls the palate?
Cranial nerve IX, the glossopharyngeal nerve (GPN) , supplies sensory innervation to the soft palate, the posterior third of the tongue, the tonsils, and most of the pharyngeal mucosa. Some fibers also supply the lingual surface of the epiglottis. This nerve controls the afferent component of the gag reflex.
What muscle elevates the soft palate?
The levator veli palatini muscle emerges from the eustachian tube and the petrous temporal bone before attaching to the palatine aponeurosis, this muscle functions to elevate the soft palate during swallowing to prevent the entry of food into the nasopharynx.
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.
What does a normal hard palate look like?
In general, the tissue is a homogenous pale pink color , firm to palpation towards the anterior and lateral to the midline while more compressible towards the posterior and medial to the apices of the teeth.
What is the function of palate?
The soft palate is continuous with the hard palate, which forms in the anterior roof of the mouth. The soft palate plays an essential role in blocking food and other substances from entering the nasal passages during swallowing and is important in the formation of certain sounds in speech production.
Which cranial nerve is responsible for swallowing?
Cranial nerve IX – Glossopharyngeal nerve
The efferent motor fibers of cranial nerve IX supply the stylopharyngeus muscle, 1 which helps elevate the larynx and expand the pharynx during swallowing.
What nerve Innervates the roof of the mouth?
Sensory innervation of the oral cavity is supplied by the branches of the trigeminal nerve (CN V) . The hard palate is innervated by the greater palatine and nasopalatine nerves, both of which are branches of the maxillary nerve (CN V2).
Which cranial nerve is responsible for Eye Movement?
Cranial nerve 3, also called the oculomotor nerve , has the biggest job of the nerves that control eye movement. It controls 4 of the 6 eye muscles in each eye: Medial rectus muscle (moves the eye inward toward the nose) Inferior rectus muscle (moves the eye down)
What problems can the soft palate cause?
The thesis shows that tissue damage in the soft palate also is an important factor that contributes to the development of sleep apnea and disturbances in swallowing function . “The nerve and muscles injuries seem to contribute to the collapse of the upper airway during sleep.
How do you shrink a soft palate?
Radiofrequency palatoplasty is a new procedure that uses an electrical current to shrink and stiffen the back part of the roof of the mouth (soft palate and uvula). When the soft palate and uvula are stiffer, they are less likely to vibrate and you are less likely to snore.
What hangs from the free edge of the soft palate?
In humans, the uvula hangs from the end of the soft palate.
How is cranial nerve 9 and 10 test?
The gag reflex tests both the sensory and motor components of CN 9 & 10. This involuntary reflex is obtained by touching the back of the pharynx with the tongue depressor and watching the elevation of the palate.
What muscles does cranial nerve 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 .
