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part of the central nervous system that contains interneurons and connects the brain with the rest of the body.
peripheral nervous system
the secondary nervous system containing nerve extensions running out from the spinal cord to all parts of the body.
most primitive part of the brain which controls involuntary reflexes such as breathing, digestion, heart rate, etc.
Left and right hemispheres. The thinking part of the brain which controls all thought.
a type of cell which passes electrical impulses to the brain and spinal cord. Relays heat, pain, texture.
Name 4 brain disorders and explain what each does?
1.MS--multiple sclerosis--the myelin sheath that protects the nerves hardens, limiting the travel of electrical impulses.
2. ALS--amyotrophic lateral sclerosis--known as Lou Gehrig's disease--the motor neurons are gradually destroyed and the muscles that depend on those nerves become useless. The brain shrinks.
3. Epilepsy--neurons release their electrical charges suddenly causing a seizure.
4. Meningitis the layers of the connective tissue that surrounds the brain and spinal cord swell. It can cause paralysis and death.
What are the 3 different groups of neurons?
Sensory neurons-sends information from the sense organs to the brain.
Motor neurons--carry electrical impulses from the brain or spinal cord to the muscles or glands.
Association neurons--which function in reflexes, which transfer electrical impulses from a sensory neuron directly to a motor neuron.22
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