There are 12 types of cranial nerves:
I Olfactory-smell
II Optic-vision
III Oculomotor-eyelid and eyeball movement
IV Trochlear-innervates superior obliqueturns eye downward and laterally
V Trigeminal-chewing face & mouth touch & pain
VI Abducens-turns eye laterally
VII Facial-controls most facial expressions secretion of tears & salivataste
VIII Vestibulocochlear(auditory)-hearing equillibrium sensation
IX Glossopharyngeal-taste senses carotid blood pressure
X Vagus-senses aortic blood pressure slows heart rate stimulates digestive organstaste
XI Spinal Accessory-controls trapezius & sternocleidomastoidcontrols swallowing movements
XII Hypoglossal-controls tongue movements
There are actually 13 nerves but only 12 cranial are recognized. They range from sensory, motor, or mixed. They stem from the spinal cord and the brain stem. Each with it's own function are important to our daily life and function.
If any of these were damaged it could be because of a stroke which would effect many of the nerves. One that would be most obvious would be the facial nerve. When a person has a stroke you can tell because the left side of their face is droopy and paralyzed because the facial nerve was damaged.
Christine,
ReplyDeleteI just wanted you to know that I read both of the blogs that you have posted. Your second blog is very well done. There are some inaccuracies in the info. in your first blog on neurophysiology, that perhaps you and I can review when school starts back up again next week...Or perhaps you are considering coming to some of the tutoring sessions??? If so, we could discuss this topic then, remember much of this information will be on the comprehensive final - so it is worth your time now to make the effort to understand it!
Dana
I like how you told the reader that there is 13 pairs of nerves but we only recognize 12 pairs. I also liked how you listed the 12 pairs that we do recognize. It was good that you added the details about the type of nerves that they are such as sensory, motor, or mixed. I also liked how you added information about what would happen if a pair of these nerves was injured.
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