Psyc4130 1nd Edition Lecture 7 Outline of Last Lecture II Overview Review of Neuroanatomy III Major Neurotransmitters a Monoamines i Dopamine ii Norepinephrine iii Serotonin b Other i Acetylcholine ii Glutamate iii GABA Outline of Current Lecture IV Dopamine A Substantia Nigra B VTA V Roles of Dopamine A Motor B Motivation VI Norepinephrine A Locus coeruleus VII Serotonin A Raphe nuclei Current Lecture Test ch 1 2 without neuroanatomy stuff Tyrosine DOPA main therapy for parkinson s Dopamine Norepinephrine locus coeruleus Epinephrine 1 Dopamine Two major sources of dopamine in the braino Both found in midbrain A Substantia Nigra SN o Motor These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute o Clusters of nuclei in midbrain houses cells of dopamine means black area body o Dopamine producing neurons into area of brain called DORSAL STRIATUM dorsal top part Parkinson s is a dopamine deficiency o Pathway is called nigrostriatal B VTA o Motivation o Pathway is called mesolimbic o Ventral Striatum Nucleus accumbens where dopamine is being released NAc Roles of Dopamine A Motor dopamine translate the command signals that originate in motor areas of brain and causes results of skeletal muscular movement without dopamine we wouldn t be able to move our bodies we would freeze up B Motivation the actual drive craving desire pursuit o Dopamine has to do with Positive applies stimulus Negative removes stimulus Neg reinforcement take away something unpleasant Neg punishment take away something good Reinforcement increases the frequency of desirable behavior Punishment decreases the frequency of undesirable behavior Addictive behaviors porn gambling gaming sex exercise o Has everything to do with dopamines o Fixation motivating all your time towards one thing 2 Norepinephrine NE Locus coeruleus where you find cell bodies of norepinephrine releasing neurons o Major roles of norepinephrine attention how much do I need to be paying attention to my environment Helps enable short term memory so you can absorb stuff that s important to you o Sends axons down the spinal cord o Attention alerting vigilance extreme during fight or flight panic because of sleep deprivation stress and Adderall o Attention deficit hyperactivity disorder 3 Serotonin 5 HT Raphe nuclei o Send serotonin to all areas of brain and down to spinal cord o Mood affect o Affect regulation regulating your mood tied in with serotonin levels People who struggle with this tend to have low serotonin levels o Sleep cycles dependent on serotonin melatonin o Impulsive behaviors
View Full Document
Unlocking...