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A-State PSY 2013 - Parts of Nervous System

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PSY2013 1st Edition Lecture 5 Outline of Last Lecture I. Behavioral GeneticsII. Evolutionary PsychologyIII. Neuroscience A. Study of NeuronsOutline of Current Lecture I. Neuroscience (continued)B. Neurotransmitters II. Parts of the Nervous SystemA.Central v. PeripheralB.Sympathetic v. ParasympatheticC. Lobes of the BrainIII. Studying the BrainCurrent LectureI. NeuroscienceA. Neurotransmitters – carry signals between neurons(Below is the exact photo from his power point. I believe we are to know these, but what is listed below is what he harped on in class for each.)- Acetylcholine – memory- Dopamine – only produced in one part of the brain; don’t mess with it very much; it’s never alone (always with NDRP/SDRI)- Seratonin – doesn’t affect other functions as much and keeps working; housewives take this the most- Norepinephrine – less broad version of serotonin; opposite I epinephrine (aka adrenaline)- GABA – causes neurotransmitters to shut off; lack of this causes seizures (neurotransmitters won’t stop firing)- Glutamate – makes it easier for other neurotransmitters to fireo MSG – too much causes seizuresThese 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.II. Parts of the Nervous SystemA. Central v. Peripheral- Central: Brain and spinal cord; reflexes- Peripheral: Nerves; sensesB. Sympathetic v. Parasympathetic- Sympathetic: When we must act quicklyo Fight or flight (see Lecture 4 for example)o Pupils dilateo More alerto Burns a ton of energy- Parasympathetic: Normal stateo Brings you down from sympathetico Anxiety disorders are the result of this failingC. Lobes of the Brain- Frontal lobeo Decision makingo Personalityo ThinkingExample: In class he talked about a man named Phineas Gage. Long story short, his team was trying to put stakes in the ground via explodingthem downwards. However, his team put the “ingredients” in the hole inreverse order and the stake shot upwards through his head. There was only damage to the frontal lobe and the man was fine, but his personality was completely different.- Temporal lobe (2 – one on either side)o Languageo Hearingo Short-term memory- Parietal lobeo Touch Lips, hands, genitalia are most sensitive (in order from greatest to least) Back is least sensitiveo Movement Tongue has greatest movement Back has least movement- Occipital lobeo VisionIII. Studying the Brain (you just have to take it out and look at it)- Corpus callosum – connects two halves of braino The body is contralateral, meaning the left half of the brain controls the right half of the body and vice versa.Example: In class, we talked about what would happen if you snipped the corpus callosum. Say you showed someone an image through a device similar to binoculars, but the two eyes had different pictures. For this example, we will use a tree on the left and a house on the right. Theimage would look something like what is displayed to the left. Because we are contralateral, the person would say they saw a tree, but if you told them to draw it, they would draw a house. The left half of the brain is for language, while the right half is for creativity (drawing).- Hemispherectomy – cut out half of braino Neuroplasticity – neurons/axons connect to different dendrites and strengthen connections- Electrical impulseso Electroencephalogram (EEG/EKG) Measures on top of skull Uses distance to determine speed- Neuroimageryo PET scano MRI (measures blood flow)o fMRIo CT


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