Fear of mice avoid a mouse, showing there may be some basis for this belief. It is not known why elephants should react in this way, though there are several theories. Regardless, elephantine murophobia remains the basis of various jokes and metaphors. The classical board game Dou Shou Qi has the Rat kill an Elephant: as multiple editions of the rule book mentions that the Rat would crawl into the Elephant's ears to gnaw into its brain: but this is considered to be a folk tale. Gertrude of Nivelles is the patron saint of murophobia, and is also invoked against rats and mice
Abnormal cannabidiol Abnormal cannabidiol Abnormal cannabidiol (Abn-CBD) is a synthetic regioisomer of cannabidiol, which unlike most other cannabinoids produces vasodilator effects, lowers blood pressure, and induces cell migration, cell proliferation and mitogen-activated protein kinase activation in microglia, but without producing any psychoactive effects. It has been shown that the actions of abnormal cannabidiol are mediated through a site separate from the CB and CB receptors, which responds to abnormal cannabidiol, O-1602, and the endogenous ligands: anandamide (AEA), N-arachidonoyl glycine (NAGly) and N-arachidonoyl L-serine. Multiple lines of evidence support the proposed identification of this novel target in microglia as the previously "orphan" receptor