Neuron- highly specialized cell that transmits electrical impulses

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Neuron- highly specialized cell that transmits
electrical impulses

• Stephen M. Fowler

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Nervous System

• Central Nervous System (CNS)- brain and spinal
  chord
• Peripheral Nervous System (PNS)- all nerves
  extending from and going to the CNS
• Composed of over 100 billion neurons

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Elements of a Neuron
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Neurotransmitters

• Are required along with vesicles to transmit a
  nerve impulse from one neuron to another over the
  synapse.

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Classes of Neurons

• Afferent- do not have dendrites transmit
  impulses from specialized structures to the
  Central Nervous System
• Efferent- conduct electrical signals from the CNS
  to muscle or glad cells
• Inter- reside entirely within the CNS and make up
  about 99 of all neurons

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Neuroscience Terminology

• Nerve- bundle of axons in the PNS
• Pathway- bundle of axons in the CNS
• Commissure- a collection of nerve fibers linking
  the left and right halves of the CNS
• Nuclei- cell bodies linked together in the CNS
• Ganglia- cell bodies linked together in the PNS

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References

• Pasternak
• http//en.wikipedia.org/wiki/Main_Page
• http//psych.athabascau.ca/html/Psych402/Biotutori
  als/2/myelin.shtml