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| Thin layers of densely packed nerve cells (neurons), 1/8 of an inch thick covering cerebrum; most human part of our 3 lb brain. It contains billions of neurons; almost 3/4 of cells in our brain |
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Two thirds of cortex is hidden in this folds |
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| Cell bodies in the cortex |
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(Little brain, 10 % of brain volume, 2 hemispheres) Coordinates muscle movement, balance, muscle tone, and posture Role in motor learning and memory of motor skills |
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Breathing, Heartbeat (heart rate and pulse), Blood pressure, Swallowing, Vomiting, Coughing, Sneezing (Hicup and gag reflex) |
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Reticular Formation (Reticular Activating System) RAS |
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Attention, Alertness, Arousal, Sleep Acts as the "Gate-keeper" screening and filtering incoming sensory info |
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Brain's "Relay station" "Switchboard" "Switching Station" Recieves all incoming sensory info (except smell) and relays that info info to the appropriate areas of the brain |
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| Regulates: Hunger, Thirst, Sexual behavior, Autonomic Nervous System, Endocrine System, Homeostasis |
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