Chapter 11 Nervous system
What is CN I?
- Olfactory nerve
What is CN II?
- Optic Nerve
What is CN III?
What is CN IV?
What is CN V?
What is CN VI?
What is CN VII?
What is CN VIII?
What is CN IX?
What is CN X?
What is CN XI?
What is CN XII?
What is the function of CN I?
What is the function of CN II?
What is the function of CN III?
- Most movement of the eyeball, eyelid, and pupil size
What is the function of CN IV?
- Movement of eyeball
What is the function of CN V?
- Chewing; sensations in face scalp, cornea, teeth
What is the function of CN VI?
- Eyeball movement
What is the function of CN VII?
- Facial expression, salivation, taste, tearing, and blinking
What is the function of CN VIII
- Hearing and balance
What is the function of CN IX?
- Swallowing, secretion of saliva; taste
What is the function of CN X?
- "Wanderer" nerve
What is the function of CN XI?
- Head movement and shrugging shoulders, swallowing
What is the function of CN XII?
- Speech and swallowing
What protects the spinal cord?
- The spinal cord is protected by vertebrae, meninges, cerebrospinal fluid, and the blood-brain barrier
What are ascending tracts?
- A tract that carries sensory information up the spinal cord toward the brain
What are descending tracts?
- A nerve tract that carries information away from the brain and down the spinal cord toward the periphery
What is a crossing over as in nerve fibers crossing from one side of the brain or spinal cord to the other side?
What part acts as a major reflex center?
- The spinal cord
What is a major descending tract?
- Pyramidal tract (corticospinal tract)
What is a single nerve cell?
What are bundles of neurons with fascia and blood supply?
Where are nerves located?
- Outside the CNS
What is a nerve that is found inside the CNS?
What three ways are nerves classified as?
- Sensory nerves
- Motor nerves
- Mixed nerves
Which cranial nerve does not arise from the base of the brain?
- CN X (vagus nerve)
What are tiny holes in the vertebrae through which nerves exit from the bony vertebral column?
What is an area of innervated by a spinal nerve called?
What nerves carry sensory information, such as touch, pressure, and pain, to the parietal lobe of the cerebrum?
- Somatic afferent nerves
What nerves carry motor information to the skeletal muscles?
- Somatic efferent nerves