This 2014 rodent study provided more details on the CA3 segment of the hippocampus:

“Silencing of either the left or right CA3 was sufficient to impair short-term memory…

Only left CA3 silencing impaired performance on an associative spatial long-term memory task, whereas right CA3 silencing had no effect.”

http://www.pnas.org/content/111/42/15238.full “Left–right dissociation of hippocampal memory processes in mice”