In higher vertebrates (reptiles, birds, mammals) there are 12 pairs of cranial nerves: olfactory (CN I), optic (CN II), oculomotor (CN III), trochlear (CN IV), trigeminal (CN V), abducent (or abducens; CN VI), facial (CN VII), vestibulocochlear (CN VIII), glossopharyngeal (CN IX), vagus (CN X), accessory (CN XI), and
Herein, what is cranial and spinal nerves?
The nervous system comprises the central nervous system, consisting of the brain and spinal cord, and the peripheral nervous system, consisting of the cranial, spinal, and peripheral nerves, together with their motor and sensory endings.
What are the 12 cranial nerves in order?
List of the Cranial Nerves
- I Olfactory (Smell)
- II Optic (Sight)
- III Oculomotor (Moves eyelid and eyeball and adjusts the pupil and lens of the eye)
- IV Trochlear (Moves eyeballs)
- V Trigeminal (Facial muscles incl.
- VI Abducens (Moves eyeballs)
- VII Facial (Taste, tears, saliva, facial expressions)
How do cranial and spinal nerves differ?
Cranial nerves are the nerves that emerge directly from the brain (including the brainstem), in contrast to spinal nerves (which emerge from segments of the spinal cord). Cranial nerves relay information between the brain and parts of the body, primarily to and from regions of the head and neck.