brain and behaviour - neurotransmitters

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1

fisher - aim

investigate neural mechanisms of romantic love

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2

fisher - participants

  • 17 “intensely in love”

  • mean age 21

  • in love around 7 months

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3

fisher - method

  • placed in fMRI

  • view photo of loved on for 30 seconds

  • filler activity for 40 seconds

  • view photo of emotionally neutral acquaintance = 30 seconds

  • filler activity = 20 seconds

  • brain responses compared

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4

fisher - results

pattern of activation in brain in response to photos of loved ones

especially prominent in dopamine rich areas

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5

Martinez and Kesner - aim

determine the role of acetylcholine in memory formation

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6

Martinez and Kesner - method

  • mice run t-maze to find food in 1 arm

  • timed how long it takes

  • after running the maze but before memory consolidation injected with 1 of 3 chemicals

    • scopolamine - blocks acetyle receptors inhibiting any response

    • physostigmine - breaks down enzyme acetylcholinesterase, breaking down acetyl receptors in synapse

    • placebo - control for adrenalines effect on memory

  • mice timed how long it takes to run maze again

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7

Martinez and Kesner - results

  • scopolamine group took longer and made more mistakes

  • physostigmine group learned faster and made less mistakes

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8

Martinez and Kesner - strengths

  • control = reliable

  • easily replicable

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9

Martinez and Kesner - weaknesses

rats can smell food not remember its location

low ecological validity

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10

fisher - strengths

  • replicable

  • reliable (lab)

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11

fisher - weaknesses

  • culture bias - generalisability

  • low ecological validity

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