9-8-11 - 9-8-11 Thursday, September 08, 2011 11:08 AM Types...

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Unformatted text preview: 9-8-11 Thursday, September 08, 2011 11:08 AM Types of Neurons Afferent (Sensory) Transmissions of Neural Information The sodium-potassium pump Maintains electrical balance of the neuron More sodium outside/potassium inside (both have positive charge) Maintains equilibrium by removing sodium and injecting potassium Polarization: Neuron is at rest When stimulated, sodium rushes in the cell and causes positive charge throughout the neuron (action potential, depolarization) Hyperpolarization: Inhibited action Re-uptake: When neurotransmitters go back to the Axon terminal Types of neurotransmitters Excitatory and inhibitory Specifically: Acetycholine Muscle control, heart rate, breathing, memory Norepinephrine Conscious arousal, regulation of mood and sleep Dopamine Initiation of movement, Parkinsons(damage to dopamine)/Schitsophrenia (too much dopamine) GABA Inhibitor Serotonin Mood, motivation, eating, sleeping, aggression, Endorphins Internally produced chemicals that resemble Opiates in structure and effects Associated with painkilling (analgesia) Agonists: mimic neurotransmitters Antagonists: block neurotransmitters Major Structures of the CNS Spinal cord Transmits and receives information from and to the brain to the rest of the senses in the body Brain stem Medulla: regulates bodily functions (heart rate, breathing) Cerebellum: coordination, balance Thalamus Responsible for integrating sensory information and then sending that sensory information to other parts of the brain Hypothalamus Appetitive behavior; hunger, thirst, body temperature, sex Prader-Willi Syndrome: rare genetic disorder that affects hypothalamus ...
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9-8-11 - 9-8-11 Thursday, September 08, 2011 11:08 AM Types...

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