passages.id: split_8_test_1817_passage
passages.type: progene_text
passages.text: We have found that anoxia - induced network oscillations ( ANOs , 20-40 Hz , lasting for 1-2 min ) can be reproduced in the intact hippocampi of postnatal day P7 - 10 rats in vitro , and we have examined the underlying mechanisms using whole - cell and extracellular field potential recordings in a CA3 pyramidal layer .