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General info about Neurons |
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-sensory, motor,interneurons -Parts of a neuron: axons, dendrites, cell body, axon terminals -sensory info in/motor signals out/ memory circuits/ decision making/ intelligence/ neurons are "information processing" |
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What does a sensory Neuron do? |
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take in info from external environment and turn it into electrical signals -specialized dendrite endings respond to light, motion, touch, and chemicals |
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what do motor neurons do? |
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motor neurons have connections with muscle fibers through specialized axon endings |
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receive information from one directions and shoot it out in another direction -input from "upstream" neuron -output from "downstream" neuron |
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axons bringing info in (mnemonic: “ascending” or “admit”) |
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axons bringing info out (mnemonic: “exiting”) |
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-associated with planning and execution of voluntary movements -if damaged, there will be problems in the planning and execution of these movements |
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appears to be disproportionally larger than other parts of the brain in humans -working memory, creativity, planning |
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Lobes of the Brain: Frontal Lobe |
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higher order cognitive functions |
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Lobes of the Brain: parietal lobe |
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Lobes of the Brain: Occipital lobe |
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vision interpretation of visual stimuli |
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role in memory; functioning long term memory -navigation (spatial) -1 on both sides of the brain |
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relation to emotion and memory as emotional stimuli |
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Proposed by C. Owen Lovejoy @Kent State -Links the advent of bipedality with a unique reproductive strategy |
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What are the hypotheses for primate brain evolution? |
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1. cognitive mapping hypothesis 2.Extractive Foraging Hypothesis 3. Social Intelligence hypothesis (Machiavellian intelligence) |
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What is the cognitive mapping hypothesis? |
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1 of the hypotheses for primate brain evolution, seeking widely dispersed resources (fruit) favored increased cognitive ability |
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What is the Extractive Foraging Hypothesis? |
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1 of the the hypotheses for primate brain evolution -seeking hidden food resources, such as insects or roots, increased cognitive ability |
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What is the social intelligence hypothesis? |
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1 of the hypotheses for primate brain evolution -machiavellian intelligence -living in groups promoted increased cognitive ability |
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What are the different hypotheses for human Brain evolution? |
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1. cognitive reserve hypothesis 2. general intelligence hypothesis 3. adapted intelligence hypothesis |
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What is the cognitive reserve hypothesis? |
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one of the hypotheses for human brain evolution -larger brai buffers itself against injury or disease, increases longevity |
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What is the general intelligence hypothesis? |
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one of the hypotheses for human brain evolution -larger brains give greater efficiency in many cognitive tasks |
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What is the adapted intelligence hypothesis? |
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one of the hypotheses for human brain evolution -one or several specific evolutionary factors involved: tool use and/or hunting, ecological strategies, social or machiavellian intelligence |
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What is the Universal Grammar hypothesis? |
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-suggests a human-only genetically-based "language organ' in the brain -language arose in humans sometime in the last 100,000 years -all natural languages are expected to share certain features-this is the universal grammar |
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What are some anatomical features related to language? |
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1. humans have a lower larynx that increases the possibility of choking 2. human tongues are short and deep, allows humans to produce a wide variety of sounds 3. neural control of structures involved in speech are greater in humans |
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