The Cranial Nerves

There are twelve pairs of cranial nerves; they are attached to the brain and are transmitted through foramina in the base of the cranium. The different pairs are named from before backward as follows:
1st. Olfactory Type:Sensory Function:Smell
2d. Optic. Type:sensory Function:Vision

3d. Oculomotor. Type:mixed-motor Function:Proprioception

4th.Trochlear. Type:mixed-motor Function:Proprioception

5th. Trigeminal. Type:mixed Function:touch,pain and temperature impulse

6th. Abducent. Type:mixed-motor Function:Proprioception

7th. Facial. Type: Mixed Function:Proprioception and taste
8th. Acoustic. Type:mixed-sensory Function:Conveys Equilibrium impulse
9th. Glossopharyngeal. Type:Mixed Function:Taste and somatic sensation
10th. Vagus. Type:mixed Function:Taste and somatic sensation
11th. Accessory. Type:Mixed -motor Function:Proprioception
12th. Hypoglossal. Type:Mixed-motor Function:Proprioception

The area of attachment of a cranial nerve to the surface of the brain is termed its superficial or apparent origin. The fibers of the nerve can be traced into the substance of the brain to a special nucleus of gray substance. The motor or efferent cranial nerves arise within the brain from groups of nerve cells which constitute their nuclei of origin. The sensory or afferent cranial nerves arise from groups of nerve cells outside the brain; these nerve cells may be grouped to form ganglia on the trunks of the nerves or may be situated in peripheral sensory organs such as the nose and eye. The central processes of these cells run into the brain, and there end by arborizing around nerve cells, which are grouped to form nuclei of termination. The nuclei of origin of the motor nerves and the nuclei of termination of the sensory nerves are brought into relationship with the cerebral cortex, the former through the geniculate fibers of the internal capsule, the latter through the lemniscus. The geniculate fibers arise from the cells of the motor area of the cortex, and, after crossing the middle line, end by arborizing around the cells of the nuclei of origin of the motor cranial nerves. On the other hand, fibers arise from the cells of the nuclei of termination of the sensory nerves, and after crossing to the opposite side, join the lemniscus, and thus connect these nuclei, directly or indirectly, with the cerebral cortex.