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文献 归档 | Jack's Space

Early tagging of cortical networks is required for the formation of enduring associative memory. Spontaneous changes of neocortical code for associative memory during consolidation. Hypothalamic modulation of adult hippocampal neurogenesis in mice confers activity-dependent regulation of memory and anxiety-like behavior. Hippocampal-amygdala memory circuits govern experience-dependent observational fear Ripple-selective GABAergic projection cells in the hippocampus. Glutamatergic synapses from the insular cortex to the basolateral amygdala encode observational pain. Amount of fear extinction changes its underlying mechanisms. VTA dopamine neuron activity encodes social interaction and promotes reinforcement learning through social prediction error.
Distinct signals in medial and lateral VTA dopamine neuro...
阿杰 Jack · 2022-04-30 · via 文献 归档 | Jack's Space
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通讯作者

Ilana B Witten

Introduction

  • reward prediction errors
  • VTA DA neuron

Results

  • condition后,Medial VTA 展现出了reward prediction errors现象,Lateral VTA 展现出了salience相关,两者放电模式不同
    • extinction时,当声音出现,Medial VTA DA neuron活动下降,声音结束时活动上升
    • extinction时,当声音出现和结束,Lateral VTA DA neuron活动都是上升
  • DA neuron的活动和freezing水平相关
    • 声音开始时,Medial DA neuron活动下降越厉害,freezing越强,Lateral DA neuron活动越强,freezing越强;
    • 相反,声音结束时,Medial DA neuron活动上升越厉害,freezing越强,Lateral DA neuron活动越强,freezing越强。
    • 说明freezing程度与Lateral DA neuron活动的绝对值相关。
  • 在声音结束时,使用光遗传学抑制Medial DA neuron可以延长extinction所需要的时间
  • 在声音开始时,使用光遗传学抑制Lateral DA neuron可以延长extinction所需要的时间

参考文献

Cai, Lili X., et al. “Distinct signals in medial and lateral VTA dopamine neurons modulate fear extinction at different times.” Elife 9 (2020): e54936.