![]() In contrast to the spinal nerves, however, not all cranial nerves carry both sensory and motor information. The motor information can also be subdivided into 1) somatic motor and 2) parasympathetic. We can subdivide the sensory information further into 1) special senses and 2) general senses. These nerves can carry both sensory and motor information, just as we have seen with spinal nerves. The names usually correspond to either the function or the structure of the nerve, hence, the Optic nerve is involved with vision and the Trigeminal nerve has 3 branches. The numbering starts with those most superior and anterior and progresses posteriorly and inferiorly. The cranial nerves are designated by Roman numerals (I - XII) and by names. There are twelve pairs of cranial nerves that originate in the brain and carry information to and from the brain. Doing an examination of the cranial nerves can provide valuable clinical information about the state and condition of the nervous system. When the doctor shined a light into her eyes to check her reflexes he was actually performing a small part of a cranial nerve examination. ![]() Remember the friend that you took to the emergency room after she got hurt sledding. ![]() You will also study the location and anatomy of these nerves in Bio 264 lab. CLICK HERE to load an image search of cranial nerves and check some of the thumbnails out to help you get an idea of where these nerves are at. There are lots of great pictures of cranial nerves in any internet search. ![]()
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