Why study the brain

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Why study the brain? Where is behavior
controlled?

• Why study the brain?
• Where is behavior controlled?

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CHAPTER OVERVIEW

• Neuron (parts)
• How the neuron fires
• Divisions of Nervous System
• Brain structures and their function
• Cerebral Cortex subdivisions and function
• Endocrine system

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• Each neuron is like a tiny battery ready to be
  discharged or activated. IONS are electrically
  charged molecules inside and outside the neuron.
  There is a slight negative charge during rest-
  the RESTING POTENTIAL. When threshold is reached
  the neuron fires. Threshold is the change needed
  in electrical charge for the neuron to fire.

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Fig. 3-1, p. 74
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• Know parts of a neuron
• Be able to label
• Know Divisions of the Nervous System

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Fig. 3-17, p. 92
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• Biological psychology- a subfield of psychology
  that studies the links between biology and
  behavior (neuropsychology)
• Neuron- the most basic unit of the nervous system
• In dendrites-soma-axon-terminal braches-
  neurotransmitters are released into the synapse
  by the terminal buttons. Myelin sheath, made of
  glia cells, insulates and speeds up transmission
  of the neural impulse.
• Likely that damage to myelin sheath involved
  many neurological disorders

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• Action potential- neural impulse, change needed
  in electrical charge for a neuron to fire.
• Fires according to the All-or-none- law

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• Threshold- the change needed in electrical charge
  for the neuron to fire.
• Neuronal communication is based on chemicals
  called neurotransmitters.
• How a neuron fires Na in
• K out
• Threshold is reached and the neuron fires.

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• Neurotransmitters
• Dopamine attention, emotion,
  Parkinsons disease
• Acetylcholine (Ach) Memory, muscles
• Serotonin lt depression

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Fig. 3-16, p. 91
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Fig. 3-19, p. 94
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Fig. 3-18, p. 93
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Fig. 3-14, p. 87
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