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Nervous system

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Uploaded on Oct 18, 2007

THOUGHT & ACTION

All thought and action result from your nervous system: the brain, spinal cord and nerves. This system is more sophisticated than any computer

Touching an object stimulates sensory receptors under the skin.

These generate rapid electro-chemical impulses that travel tiny highways called nerves either to the spinal cord- for reflexes- or to the brain.

Here, the impulses move along neural pathways, exciting clusters of cells in specialized sections of the brain for interpretation and then action.

From the brain, the impulses again travel the nerve highways in this case, to a muscle. This time the message is clear

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