Elements of Psychology Notes Week 3
Elements of Psychology Notes Week 3 PSY 1113
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This 5 page Class Notes was uploaded by Ryan Henry on Friday February 5, 2016. The Class Notes belongs to PSY 1113 at University of Oklahoma taught by Jenel Cavazos in Fall 2015. Since its upload, it has received 14 views. For similar materials see Elements of Psychology in Psychlogy at University of Oklahoma.
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Date Created: 02/05/16
Psychology Notes Week 3 The Nervous System: ● Afferent nerves: sensory nerves => brain and spinal cord ● Efferent nerves: carry messages from the brain and spinal cord to motor neurons ● Neural networks : networks of nerve cells that integrate sensory and motor nerves (Sympathetic is known as fight or flight instincts” while parasympathetic is known as “rest and repose”) (electric pulses travel from dendrites to axons) ● Resting potential: the axon is negatively charged when not in use and when a message comes through, the axon flips the charges like this: ● Which sends the message to the dendrites of another axon ● The message cannot be “strong” or “weak” just on or off (like turning on the lights) ● Speed varies based on the thickness of the myelin sheath and length of the neuron (thicker sheath moves faster, shorter neuron moves faster) Synapses and neurotransmitters: ● The more a signal is sent to a neuron, the stronger the signal will become and the faster it will act (like studying material over time has better results than cramming) ● Synapse: space between axon of sending neuron and dendrites or receiving neuron ● Neurotransmitters: chemicals that carry messages across the synapse ● Reuptake: the reabsorption of neurotransmitters ○ Selective Serotonin Reuptake InhibiSRI) keeps serotonin in the neuron, used as a treatment for depression. (Types of neurotransmitters and what their purpose is) (DO NOT need to memorize for the tebut know the basics like serotonin and dopamine) ● Thalamus: Relays info between lower and higher brain centers ● Reticular Functio: diffuse collection of neurons involved in arousal and stereotypes patterns, such as walking ● Pons: governs sleep and arousal ● Medulla: Governs breathing and reflexes ● Cerebellum: Rounded structure involved in motor coordination ● Brainstem (general): Keeps us alive even when we do stupid things (breaths for us while we are doing other things) ● Hippocampus: involved in creating long term memories (goes offline when heavy drinking (makes sense)) ● Amygdala: involved in fear and discrimination of objects necessary for survival (why we find spiders and bears scary) (or why we hate Kmart because of one bad experience when an old guy was a dick) ○ Psychopaths have low threshold in their amygdala, so they don't find somethings scary while normal people do. ● Cerebral Cortex: the big wrinkly thing and controls logic, brain functions, thinking, or just people things (last thing to mature) The Brain's Hemispheres: ● Hemispheres operate contralaterally (left controls right, right controls left) ● Lateralization: the dominance of one hemisphere ○ Left: verbal abilities, thinking, reading, reasoning, sequential ○ Right: Visualspatial, emotional expression, artistic, global ■ Does not mean people are “left brained” or “right brained” ■ Most things are not lateralized, equally used ○ Communicates via the Corpus Callosum Genes and behavior: ● Behavior genetics: the study of heredity influence on behavior
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