Distinct neuronal populations contribute to trace conditioning and extinction learning in the hippocampal CA1

eLife

Xue Han¹  Rebecca A Mount¹  Kyle R Hansen¹  Sudiksha Sridhar¹  Howard J Gritton¹  Moona Abdulkerim¹  Robb Kessel¹  Ali I Mohammed¹  Bobak Nazer² 

[1] Department of Biomedical Engineering, Boston University, Boston, United States;Department of Electrical and Computer Engineering, Boston University, Boston, United States;

关键词: trace conditioning;    extinction learning;    hippocampus;    calcium imaging;    Mouse;   

DOI  :  10.7554/eLife.56491

来源: eLife Sciences Publications, Ltd

【 摘 要 】

Trace conditioning and extinction learning depend on the hippocampus, but it remains unclear how neural activity in the hippocampus is modulated during these two different behavioral processes. To explore this question, we performed calcium imaging from a large number of individual CA1 neurons during both trace eye-blink conditioning and subsequent extinction learning in mice. Our findings reveal that distinct populations of CA1 cells contribute to trace conditioned learning versus extinction learning, as learning emerges. Furthermore, we examined network connectivity by calculating co-activity between CA1 neuron pairs and found that CA1 network connectivity patterns also differ between conditioning and extinction, even though the overall connectivity density remains constant. Together, our results demonstrate that distinct populations of hippocampal CA1 neurons, forming different sub-networks with unique connectivity patterns, encode different aspects of learning.

【 授权许可】

CC BY