Health Ch. 15 lesson 4

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central nervous system
brain and spinal cord
peripheral nervous system
includes nerves that extend from the brain, spinal cord, and sensory receptors, gathering information from inside and outside your body
neurons
nerve cells, sensory, motor and interneurons
spinal cord
a long column of nerve tissue about the thickness of your index finger, extending about 18 inches down your backe
vertebrae
the bones that make up your spine.
cerebrum
the largest and most complex part of the brain and is responsible for conscious thought, learning and memory
cerebellum
the second largest part of the brain that coordinates the movement of skeletal muscles
brain stem
a three inch stalk of nerve cells and fibers that connects the spinal cord to the rest of the brain
quadriplegia
an injury to the upper part of the spinal cord resulting in the loss of use in arms and legs
paraplegia
an injury to the lower part of the spinal cord resulting in loss of use in legs
Parkinson's disease
the destruction of nerve cells in an area of the brain that helps coordinate skeletal muscles movement. Results in muscle tremors.
Multiple sclerosis
destruction of the myelin sheath that surrounds the axons of neurons in the CNS. Results in nerve damage
Alzheimer's disease
neurons in the brain are destroyed resulting in confusion, loss of memory and gradual mental deterioration.
Epilepsy
a disorder of the nervous system that is characterized by recurrent seizures, uncontrolled electrical activity in the brain.
Cerebral palsy
a group of nonprogressive neurological disorders that are the result of damage to the brain before, during or just after birth or in early childhood.