A Focus on Neuroscience box, "Emotions and the Brain,"described a PET scan study by researcher Antonio Damasio and his colleagues. The study found that when participantsre called an emotionally charged memory:
A) internal brain changes occurred after the participant reported subjectively feeling the emotion.
B) there was an increase in brain levels of the neurotransmitter neuropeptide Y (NPY) .
C) there was an increase in brain levels of the neurotransmitter cholecystokinin (CCK) .
D) internal brain changes occurred before the participant reported subjectively feeling the emotion
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