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Central Nervous System (Drug Affects (Methamphetamine (Reward pathway and…
Central Nervous System
Major Functions
Integrative Function
Analyzes sensory information,stores some aspects, and makes decisions regarding appropriate behaviors
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Spaces and Ventricles
CNS
brain and spinal cord
information is integrated, thoughts and emotions are generated, memories are formed and stored
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Lobes
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Parietal
Receives impulses for touch,pain,proprioception, and temperature
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Action Potential
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Step 3: If a strong enough, depolarization occurs, threshold potential is reached and impulse is sent down axon
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Step 4: K+ is rushed out of of neuron after Na+ rush in, which causes a repolarization of the membrane back to resting potential
Tissues
Neuron made of
Dendrites
Receiving portions, short, tapered and highly branched
Axon
Starts as a single fiber, but may give off branches called collateral axon
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Layers of Meninges
Arachnoid Mater
Spider-web like, thin membreane that lacks blood vessels, subdural space
Pia Mater
Innermost, nearly transparent layer, follows contours of brain and spinal cord, subarachnoid
Dura Mater
Outermost layer, dense irregular c.t, attached to periosteum, meningitis
Drug Affects
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Marijuana
Short term memory, slows movement, and calming feeling
Cocaine
Reward pathway, voluntary movement,cocaine abusers, and fidgeting
Ecstasy
Affects sleep, perception, and appetite
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