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Learning and Memory (Long Term Potentiation (How does it occur? (Creation…
Learning and Memory
Long Term Potentiation
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How does it occur?
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The glutamate goes to the glutamate receptor (AMPA) and opens that which activates Na+ to be let into the dendrite
If it is enough glutamate that will activate the Mg to be pushed away from the NMDA receptor. Now, Ca- can enter
Now the Ca- can attach to proteins and essentially make proteins (CREB and CaMKII) that create new AMPA receptors
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The Hippocampus
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Spatial Memory
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Damage
Radial Arm Task
The rats with damage would re-enter paths of the maze where they should have known there was no food there anymore because they already ate it
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Consolidation
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Damage shows that in rats if the hippocampus is damaged, the rat can learn a new task but it'll forget it quickly
Drugs that block protein synthesis in hippocampus (before learning or right after) doesn’t prevent learning but prevents remembering task 2 days later
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Types of Memory
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Long-Term
Implicit Memory
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Ex. That exercise you did where you listened to the story and then had to fill in the words with missing letters and you usually ended up spelling words that were in the story
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Types
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Non-Associative
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Sensitization
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Ex. dog initially likes riding in the car but after a couple of rides to the vet, it stops because it associates the car with bad vet experiences
Explicit Memory
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Types
Semantic
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Ex. names of colors, capitals of countries
Semantic Dementia
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Ex. holding a closed umbrella over your head, bringing wife a lawnmower when she asked for a stepladder
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Episodic
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Ex. your skiing vacation last winter, the first time you traveled by airplane
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Types of Amnesia
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Who was H.M.?
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Issues
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was not able to imagine a future because that requires you to remember past events to use as a basis
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Lashley's Engram
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He didn't find an actual physical representation of learning but he found that overall when more brain areas were working, the brain was more effective in learning
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Thompson's Engram
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He found that learning occurred in a kind of linear way. From there he discovered that the LIP (lateral interpositus nucleus) was responsible for learning because it played a big role in the linear process of learning. It was kind of the end-all-be-all.
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