Which is the major function of the glossopharyngeal nerve quizlet?
The glossopharyngeal nerve is cranial nerve IX. Its major motor function is to help in swallowing.
What happens when the glossopharyngeal nerve is damaged?
Glossopharyngeal nerve lesions produce difficulty swallowing; impairment of taste over the posterior one-third of the tongue and palate; impaired sensation over the posterior one-third of the tongue, palate, and pharynx; an absent gag reflex; and dysfunction of the parotid gland.
What is the course of the glossopharyngeal nerve?
Course. It exits the medulla oblongata from the postolivary sulcus, the glossopharyngeal nerve passes laterally across the flocculus, and leaves the skull through the pars nervosa of the jugular foramen in a separate sheath of the dura mater. It then passes between the internal jugular vein and internal carotid artery.
What is the function of the hypoglossal nerve?
The hypoglossal nerve enables tongue movement. It controls the hyoglossus, intrinsic, genioglossus and styloglossus muscles. These muscles help you speak, swallow and move substances around in your mouth.
What is the function of the hypoglossal nerve quizlet?
The hypoglossal nerve controls tongue movements.
How do you test the glossopharyngeal nerve function?
Glossopharyngeal Nerve (IX) The glossopharyngeal nerve provides sensory supply to the palate. It can be tested with the gag reflex by touching the pharynx with a tongue depressor or by touching the arches of the pharynx.
How does the glossopharyngeal nerve control blood pressure?
The glossopharyngeal and vagus cranial nerves provide the brainstem with sensory inputs from different receptors in the heart, lung, and vasculature. This afferent information is critical for the short-term regulation of arterial blood pressure and the buffering of emotional and physical stressors.
How is the sensory function of the glossopharyngeal nerve tested?
The glossopharyngeal nerve provides sensory supply to the palate. It can be tested with the gag reflex by touching the pharynx with a tongue depressor or by touching the arches of the pharynx.
How do you assess the glossopharyngeal nerve?
Which cranial nerve is responsible for smell?
Olfactory nerve (CN I)
Olfactory nerve (CN I) The olfactory nerve is a solely sensory nerve and conveys the sense of smell. Its receptors are located in the olfactory mucosa under the roof of the nasal cavity.
What is the function of the abducens nerve?
Cranial nerve six (CN VI), also known as the abducens nerve, is one of the nerves responsible for the extraocular motor functions of the eye, along with the oculomotor nerve (CN III) and the trochlear nerve (CN IV).
How is the sensory function of the glossopharyngeal nerve and the vagus nerve tested?
To examine glossopharyngeal and vagus nerve function, the physician tests for the presence of touch sensation on the soft palate and the back of the throat (the latter usually eliciting a gagging reflex), the elevation of the palate on phonation (which should be symmetrical but rises to…
What is the glossopharyngeal nerve?
As most of the cranial nerves do, the glossopharyngeal nerve emerges from the front of the brainstem, which sits low at the back of your brain and connects the brain to the spinal cord. 1 The glossopharyngeal nerve exits the cranial cavity (skull) through a structure called the jugular foramen, which is a large opening in the base of the skull.
What are the clinical tests for glossopharyngeal nerve damage?
The clinical tests used to determine if the glossopharyngeal nerve has been damaged include testing the gag reflex of the mouth, asking the patient to swallow or cough, and evaluating for speech impediments. The clinician may also test the posterior one-third of the tongue with bitter and sour substances to evaluate for impairment of taste.
What is the afferent pathway of the glossopharyngeal nerve?
Afferent Pathway. The pathway for the afferent fibers of the glossopharyngeal nerve is the following (from the initiation in the periphery to the termination in the brain): The tympanic plexus supplies the auditory canal and the pharyngeal orifice.