The vagus nerve, historically cited as the pneumogastric nerve, is the tenth cranial nerve or CN X, and interfaces with the parasympathetic control of the heart, lungs, and digestive tract.
What are the 12 cranial nerves and functions?
The 12 Cranial Nerves
- I. Olfactory nerve.
- II. Optic nerve.
- III. Oculomotor nerve.
- IV. Trochlear nerve.
- V. Trigeminal nerve.
- VI. Abducens nerve.
- VII. Facial nerve.
- VIII. Vestibulocochlear nerve.
Which cranial nerves play a role in cardiac control?
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.
What cranial nerves check BP?
|Cranial Nerve:||Major Functions:|
|IX Glossopharyngeal||taste senses carotid blood pressure|
|X Vagus||senses aortic blood pressure slows heart rate stimulates digestive organs taste|
|XI Spinal Accessory||controls trapezius & sternocleidomastoid controls swallowing movements|
|XII Hypoglossal||controls tongue movements|
What is the function of cranial nerve 10?
Motor Functions. The vagus nerve innervates the majority of the muscles associated with the pharynx and larynx. These muscles are responsible for the initiation of swallowing and phonation.
What is the 12th cranial nerve?
The Hypoglossal Nerve is the 12th Cranial Nerve (Cranial Nerve XII). … The nerve originates from the medulla and travels caudally and dorsally to the tongue.
What cranial nerve is responsible for reading the newspaper?
Lesions of the abducens nerve (CN VI)
This is the eye syndrome normally associated with people falling down staircases. It is characterised by the inability to turn the eye “down and in”; thus affected, the patients are unable to descend staircases safely, or read newspapers.
What is the name of cranial nerve III?
The oculomotor nerve (the third cranial nerve; CN III) has three main motor functions: Innervation to the pupil and lens (autonomic, parasympathetic)
What cranial nerve controls food?
The trigeminal nerve is responsible for sensory enervation of the face and motor enervation to muscles of mastication (chewing).
What hormones increase BP?
Renin controls the production of two other hormones, angiotensin and aldosterone. And these hormones control the width of your arteries and how much water and salt is moved out of the body. Both of these affect blood pressure.
Which cranial nerve slows down heart rate?
Parasympathetic innervation of the heart is mediated by the vagus nerve. Specifically, the vagus nerve acts to lower the heart rate.
What cranial nerve is responsible for smiling?
Within the motor system, although the muscles of mastication are innervated by the trigeminal nerve (V), the muscles of facial expression are innervated mainly by the facial nerve (VII).
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 are the symptoms of vagus nerve damage?
Potential symptoms of damage to the vagus nerve include:
- difficulty speaking or loss of voice.
- a voice that is hoarse or wheezy.
- trouble drinking liquids.
- loss of the gag reflex.
- pain in the ear.
- unusual heart rate.
- abnormal blood pressure.
- decreased production of stomach acid.
How do you test for cranial nerve 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.