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Unformatted text preview: 2-1-08 anatomy notes1.Organ Systems2.Nervous Systema.Central Nervous Systemi.Brain1.Brainstem: midbrain, pon, medulla oblongataa.Midbraini.Cerebral Peduncles-nerve tracts1.Sensory Fibers from ponsthalamusa.PonsCPThalamus2.Motor Fibers from cerebrum to ponsa.CerebrumCPPonsii.Corpora Quadrigemina1.Superior Colliculi (visual reflexes)a.BRIGHT LIGHT2.Inferior Colliculi (auditory reflexes)a.LOUD SOUNDSiii.Substantia Nigra (one of the basal ganglia but NOT located in the cerebrum1.Dark pigmented region (melanin)2.Produces a neurotransmitter called DOPAMINEa.Affects motor output3.Gradual degeneration of this tissue causes Parkinsons diseasea.A LACK of dopamine is associated w/diseaseb.Cant give a person dopamine and expect them to get better; doesnt work because the dopamine never enters the cellsc.Signs and Symptomsi.Resulting in muscular tremors and muscular rigidity (facial muscles)ii.LACK of dopamineiii.Initial treatment is L-DOPA (dihydroxyphenyaline); (1) L-DOPA enters cells that...
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