“…For anesthesia chosen in experiments, four studies (Shi et al, 2012;Han et al, 2015;Atochin et al, 2016;Zhang et al, 2020) used chloral hydrate, three studies (Zuo et al, 2018;Zhong et al, 2019) used isoflurane, four studies (Chen et al, 2016;Zhang et al, 2018;Li et al, 2020;Dong et al, 2021) used sodium pentobarbital, and the remaining four studies (Chen et al, 2009;Chen et al, 2014;Yu et al, 2014;Liu et al, 2018) did not report it. Ten studies utilized a dose gradient of RRC: one study (Atochin et al, 2016) used 5, 10 and 20 mg kg −1 intravenously, one study (Chen et al, 2016) used 20, and 40 mg kg −1 orally, one study (Han et al, 2015) used 15, and 30 mg kg −1 intraperitoneally, one study (Liu et al, 2018) used 2.5, 5, 10 and 20 mg kg −1 intravenously, two studies (Zhang et al, 2018;Li et al, 2020) used 25, 50 and 100 mg kg −1 intraperitoneally, one study used 20, 50 and 100 mg kg −1 intraperitoneally, one study (Zhong et al, 2019) used 20, 40, and 80 mg kg −1 intraperitoneally, one study (Zuo et al, 2018) used 10, 20, and 40 mg kg −1 intraperitoneally, and one study (Zhang et al, 2020) used 12 and 48 mg kg −1 through gavage. Six studies (Shi et al, 2012;Chen et al, 2014;Atochin et al, 2016;Chen et al, 2016;Zuo et al, 2018;Zhong et al, 2019) administrated RRC before stroke; Seven studies (Shi et al, 2012;Yu et al, 2014;Chen et al, 2016;Liu et al, 2018;Zhang et al, 2018;…”