Jooyoung Kim

The paper shows that astrocytes form more connections with engram neurons after learning, and these connections are stabilized by neuronal activity.

This study tracks synaptic changes in the hippocampus during fear memory formation and extinction, showing synaptogenesis and synapse modification between CA3 and CA1 engram cells.

The paper shows that associative fear memory increases spine size at synapses between engram cells in the amygdala, which decreases with extinction and recovers with re-conditioning.