learning and memory Flashcards

1
Q

what is learning?

A

process by which experience results in changes in behavior.

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2
Q

what is memory?

A

internal records of past experiences acquired through learning.

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3
Q

what is habituation?

A

a decease in the strength or occurrence of a behavior after repeated exposure to a stimulus

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4
Q

what is the acoustic startle reflex?

A

a defensive response to a startling stimulus.

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5
Q

an organism’s innate reaction to a stimulus is know as what?

A

the orienting response

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6
Q

what are three factors that influence the rate and duration of habituation?

A
  1. how arousing the stimulus is. (less arousing = faster habituation)
  2. the number of times it is experienced.
  3. the length of time b/w repeated exposure.
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7
Q

what do massed or closely spaced repetitions lead to?

A

faster habituation

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7
Q

what do spaced or repetitions spread out over time lead to?

A

longer duration habituation

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8
Q

what is sensitization?

A

concept in which an arousing stimulus leads to a stronger response to a later stimulus. (doesn’t have to be the same)

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8
Q

what are the basic concepts of classical conditioning?

A
  • unconditioned stimulus
  • unconditioned response
  • conditioned stimulus
  • conditioned response
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9
Q

what is operant conditioning?

A
  • an organism learns to make a response in order to obtain or avoid important consequences.
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9
Q

what is a cognitive map?

A

an internal psychological representation of the spatial layout of the external world

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9
Q

what is latent learning?

A

learning that is unconnected to a consequence and remains undetected until explicitly demonstrated at a later stage.

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10
Q

In the latent learning/cognitive map experiment, which group of rats had less errors over time?

A

the group that was awarded food on day 11 of the experiment

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11
Q

A small area of increased activity is called …

A

a place field

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12
Q

what are place cells and where are they found?

A

a maximally active group of neurons found in the hippocampus.

13
Q

what did Karl Lashley do?

A
  • observed effects of lesions on rats’ performance in a maze
14
Q

what is an engram?

A

a physical change in the brain that forms the basis of a memory

15
Q

in what ways can the brain change?

A
  1. dendrite length
  2. # of spines
  3. # of axon terminals
16
Q

what are the neurological results of being in an enriched environment?

A
  • more dendritic branches
  • longer dendritic length
  • greater # of connections
  • better learning performance
17
Q

what is long term potentiation?

A

when synaptic transmission becomes more effective at eliciting a postsynaptic response

18
Q

what is long term depression?

A

when synaptic transmission becomes less effective at eliciting a postsynaptic response

19
Q

who was Henry Molaison?

A

a patient who had his hippocampus removed to alleviate symptoms of epilepsy.

20
Q

Following his surgery, Henry was unable to form new episodic memories. what type of amnesia is that?

A

anterograde amnesia

21
Q

what is retrograde amnesia?

A

loss of memories for recent events but intact memories for events further back in time

22
Q

what are episodic memories?

A

a memory of a specific event

23
Q

what are semantic memories?

A

memories for facts and general knowledge about the world

24
Q

where are episodic memories initially coded and stored?

A

hippocampus

25
Q

how are memories consolidated?

A

hippocampus repeatedly sends memories to cortex where it is eventually stored independently.

26
Q

what happens to a memory if acetylcholine levels are low?

A

memories are consolidated

27
Q

what happens to a memory if acetylcholine levels are high?

A

memories are encoded

28
Q

if there is not enough time to consolidate memory in the cortex …

A

memory is still dependent on the hippocampus