Introduction to the Nervous System

The Nervous System

• Central (CNS) - the mainframe of the body. All information is processed here.
• Peripheral (PNS) - the information gatherers. The information is received here.
• The somatic nervous system is associated with

  voluntary motor control

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  of the body or sensations.
• The autonomic nervous system involves control of

  unconscious body functions

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  .

Neurons

• Electrically excitable cells
• Parts of the neuron:
• Soma
• Axon
• Dendrites
• Axon Terminal
• Information travels only in this direction: body --> axon

• Types of neurons:

1. Sensory
2. Motor
3. Interneurons