To find out if these chemical changes do indeed take place, the researchers first identified a group of
engram cells in the hippocampus that, when activated using optogenetic tools, were able to express a memory.
In contrast, hippocampal engram cells were activated by natural cues on the second day after receiving a foot shock, but not on day 13 — indicating engrams in the hippocampus become active immediately, but gradually fade into a «silent» stat
In contrast, hippocampal
engram cells were activated by natural cues on the second day after receiving a foot shock, but not on day 13 — indicating
engrams in the hippocampus become active immediately, but gradually fade into a «silent» stat
in the
hippocampus become active immediately, but gradually fade into a «silent» state.