Cranial nerves topic

Cranial nerves are nerve that emerge directly from the brain in contrast to spinal nerve which emerge from segments of the spinal cord. Although thirteen cranial nerves in humans fit this description, twelve are conventionally recognized. The nerves from the third onward arise from the brain stem. Except for the tenth and the eleventh nerve, they primarily serve the motor and sensory systems of the head and neck region. However, unlike peripheral nerve which are separated to achieve segmental... full article at wikipedia