Normal Brain Brain Substance Abuse “Begin with the Brain in Mind” Donna Anderson and Tammy Reynolds.
If I only had a brain … where would I begin? If I only had a brain … where would I begin? What...
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If I only had a brain… where would I begin? What’s in a brain?
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Transcript of If I only had a brain … where would I begin? If I only had a brain … where would I begin? What...
If I only had a brain…where would I begin?
If I only had a brain…where would I begin?
What’s in a brain?What’s in a brain?
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•How does the brain keep us How does the brain keep us alive, alert, and active?alive, alert, and active?
•Is there a primitive animal part Is there a primitive animal part of our brain? of our brain?
•How is our nervous system the How is our nervous system the result of millions of years of result of millions of years of
evolution?evolution?•What makes the human brain What makes the human brain
unique?unique?
Unit QuestionsUnit Questions
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The activities and functions of the brain
can be divided into five categories:
1.Sensation/Perception
2.Motion
3.Internal Regulation
4.Reproduction
5.Adaptation
What does the brain do ?
What does the brain do ?
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Who likes frogs…or how about fish?
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Major Divisions of the Brain
Major Divisions of the Brain
Spinal cord Brainstem Cerebellum Forebrain
• thalamus • hypothalamus• cerebral cortex
Spinal cord Brainstem Cerebellum Forebrain
• thalamus • hypothalamus• cerebral cortex
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Paul MacLeanPaul MacLean
“Primal brain” Neocortex
Paleo/mammalian
““The Triune Brain”The Triune Brain”
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1313240 million years ago240 million years ago
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What’s in our fish brain?What’s in our fish brain?
Spinal cord Connects brain to body and relays messages between them
Brain stem (pons, medulla, midbrain) Controls basic life functions such as consciousness, breathing, heart rate, and blood pressure
Cerebellum “Little brain”, located behind the brain stem
Controls movement, muscle coordination, and balance
Spinal cord Connects brain to body and relays messages between them
Brain stem (pons, medulla, midbrain) Controls basic life functions such as consciousness, breathing, heart rate, and blood pressure
Cerebellum “Little brain”, located behind the brain stem
Controls movement, muscle coordination, and balance
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Reptilian BrainReptilian Brain The reptilian brain deals with fixed action patterns and instinct
Contains the: Amygdala: fear, anger, social attraction and sexual responses
Thalamus: evolved to help relay information from the brainstem and spinal cord to the cerebral cortex, sensory and motor integration between the cerebellum, basal ganglia and cortex
Hypothalamus: controls hormonal secretions from pituitary gland––governing the four F’s : feeding, fighting, flighting, and fornicating; linked to your biological clock and circadian rhythms; body’s thermostat
The reptilian brain deals with fixed action patterns and instinct
Contains the: Amygdala: fear, anger, social attraction and sexual responses
Thalamus: evolved to help relay information from the brainstem and spinal cord to the cerebral cortex, sensory and motor integration between the cerebellum, basal ganglia and cortex
Hypothalamus: controls hormonal secretions from pituitary gland––governing the four F’s : feeding, fighting, flighting, and fornicating; linked to your biological clock and circadian rhythms; body’s thermostat
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60 million years ago60 million years ago
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Paleo/mammalian BrainPaleo/mammalian BrainThe brain of your cat or dog
Cortical tissue covering the Lizard brain
Provides greater behavioral flexibility and learning ability
Contains the hippocampus linked to: Memory perception of subordination loss of control
The brain of your cat or dog
Cortical tissue covering the Lizard brain
Provides greater behavioral flexibility and learning ability
Contains the hippocampus linked to: Memory perception of subordination loss of control
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Basis of emotion, motivation, appetite, fear and curiosity
Enhanced learning and memory
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2222Last 1 million yearsLast 1 million years
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Neomammalian Brain — Neocortex
Neomammalian Brain — Neocortex
Unique to humans (& primates)• Left cerebral hemisphere:
language, logic and approach related behavior
• Right cerebral hemisphere: holistic, image-oriented, and intuitive thinking, as well as withdrawal related behavior
Unique to humans (& primates)• Left cerebral hemisphere:
language, logic and approach related behavior
• Right cerebral hemisphere: holistic, image-oriented, and intuitive thinking, as well as withdrawal related behavior
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