Nervous System

Nicole Graham

Function Of The Nervous System

The function of the nervous system is to recognize and coordinate the body's response to changes in its internal and external environments.

Central Nervous System And Peripheral Nervous System

Central Nervous System:

  • Definition: The part of the nervous system that includes the brain and spinal cord
  • Major Parts: Brain, Brain Stem, and spinal cord


Peripheral Nervous System:

  • Definition: The part of the nervous system outside the central nervous system
  • Major Parts: All other sensory neurons, clusters of neurons called ganglia, and connector neurons

Motor Neuron

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Simple Reflex Arc

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Major Regions Of The Cerebral Hemispheres, Diencephalon, Brain Stem, And Cerebellum

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Major Disorders In The Nervous System

Optic Neuritis:

  • An inflammation of the optic nerve
  • Symptoms/Signs: Pain and temporary vision loss
  • Prevalence: 115 of 100,000 people
  • Treatment Option: Usually gets better on its own but sometime steroids are used to help stop inflammation


Sciatic Neuritis:

  • Inflammation of the sciatic nerve
  • Symptoms/Signs: Chronic lower back pain, loss of reflex, stiffness, and deminished motor skills
  • Prevalence: 3%
  • Treatment Options: Physical therapy, heat or cold therapy, deep tissue massage, and pain medication