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ch. 16: genetics and personality

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Psychology 2550A/B
Stephen Erdle

Chapter 16 Genetics and PersonalityNervous Systemy Basis of the brain y Can be broken down into 2 parts o Peripheraldeals with input and output o Centraldeals with processes y Input into the system through the peripheral nervous system with sensory neurons and output with motor neurons y Between the 2 is the nervous systemprocesses the input and leads to a decision about what to do in terms of outputassociation neurons that involve the process of information y Central nervous system made up of brain and spinal chord peripheral involve nerves that go through the rest of the bodyy Central nervous and the structures of the brain in terms of producing behaviour is whats most importantViewing the Brain y Number of techniques used to view the brain chronological y Dissectionparts of brain observed from corpses of humans and animalsdissect the brain after someone has died and observe the parts of the brainthe earliest method ancient Greecelooks at structures of the brain that can be observed when cutting into the brain y Surgerycan be done on a living person instead of having to wait until the person diessee what various structures there are and can also get an idea of the functions of the parts of the braincan lesion parts and see what effects there arey ElectricityEEG electro encephalogramlook at electrical activity in the brain to find out which parts of the brain are functioning during different activitiesy Xrayscan see various structurescat scan doing a sequence of xrays put together to view 3D pictures of the brain y MagnetismMRI or FMRI functioning magnetic resonance imagingMRI givens picture of magnetic activity in various parts of the brainFMRI gives an active picture instead of a static one like in MRI y Radioactive glucosePET scans positron electric tomography newest and most effective techniqueinjected with radioactive glucose that goes into the brain through the blood and when different areas of the brain are active it shows up as different colours in the PET scancan see changes throughout time fluid not staticBrain y Can be divided into 3 parts y Hindbrain o Hind brain developed firstall animals have hind brains evolutionary o Deals with very basic functions o 3 partsCerebellumdeals with the functions of balance and coordinationbasic motor movementsPonsdeals with regulating sleepMedulla oblongatadeals with digestive system y Midbrain
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