Colour centre in humans as an area specialized for colour vision. V2, also called the prestriate cortex, is believed to have a small role in colour processing by projecting signals from V1 to the V4-complex. Whether or not colour selective cells are present in V2 is still being investigated. Some optical imaging studies have found small clusters of red-green colour selective cells in V1 and V2, but not any blue-yellow colour selective cells. Other studies have shown that V2 is activated by colour stimuli, but not colour after images.[8] V4 also has feedback on V2, suggesting that there is a defined network
Borage (asthma, bronchitis), cardiovascular, (cardiotonic, antihypertensive and blood purifier), urinary (diuretic and kidney/bladder disorders). One case of status epilepticus has been reported that was associated with borage oil ingestion. A methanol extract of borage has shown strong amoebicidal activity "in vitro". The 50% inhibitory concentration () of the extract against "Entamoeba histolytica" was 33 µg/mL. Pliny the Elder and Dioscorides say that borage was the "Nepenthe" mentioned in Homer, which caused forgetfulness when mixed with wine. Francis Bacon thought that borage had "an excellent spirit to repress the fuliginous vapour of dusky melancholie." John Gerard's "Herball" mentions an old verse concerning