brain-ology how well do you know your brain? above all else, know thyself. -socrates -socrates
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Brain-ology
How well do you know your brain?
““Above all else, know thyself.” Above all else, know thyself.” --SocratesSocrates
The Spinal Cord
• Reflexes
• Relay
• Routine tasks
The Hind Brain• Medulla & pons
– Heartbeat, breathing, paralyzes your muscles while you sleep
– RAS—screens incoming sensory info• Relates to ADD
– Priorities of the RAS• Physical need•Novelty• Self-made choice
Our Brain Needs…
1. Oxygen Just standing, after being
seated, adds >15% more Oxygen
2. Glucose 2 ounces of Fruit (raisins)
increases long term memory by 35% & working by 20% (lasts 30 minutes)
3. Water We need 8 ounces of water for
every 25 pounds of body weight
The Limbic System• Thalamus
– Switchboard for sensory data
• Hypothalamus• Amygdala
– Sophisticated emotions & memory making
• Pituitary gland– Hormones for growth, etc.
• Hippocampus– Forms memories for us– Separates during Alzheimer’s disease
The Hypothalamus• Fully functioning at birth• Controls:
– Fear– Anger– Aggression– Fight/flight response– Hunger– Thirst– Water balance– Body temperature– Hormones– E.K.S.
The amygdala
• Plays important role in emotions
• Later development• Adult part of the brain
that brings empathy to the adolescence brain
• Puts “warm fuzzies” on the hypothalamus
The Cortex• Makes up 85% of our brain
• Only 6 cells thick
• Where we store knowledge
• Creativity
• Humor
• Problem solving
• Burns 1.5 calories/minute– 75% of blood sugar & 20% of oxygen
So, just what is our brain made of?
• Neurons—aka brain cells– Timeline of neurons
• 525 billion• 200 billion• 100 billion
We’re born with ½
of our brains already
gone!!
What does a mighty oak and a Charlie Brown Christmas tree have
to do with our brains?
If we can’t grow new neurons, how do we store more in our brains?
• Dendrites—the branches of the neurons
• Learn something new, grow a new branch– Growth takes place while you sleep
• Don’t use them, you lose them
• Once you grow one you can keep it forever
Sleep Requirements
• 3-5 years 11 hours
• 5-9 years 10.5 hours
• 10-13 years 10 hours
• 14-18 years 8.5 hours
• Adults 7 hours
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