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
Ehretia microphylla medicinally in the Philippines to treat cough, colic, diarrhea and dysentery. Ehretia microphylla Ehretia microphylla, synonym Carmona retusa, also known as the Fukien tea tree or Philippine tea tree, is a species of flowering plant in the borage family, Boraginaceae. "Ehretia microphylla" is a shrub growing to 4 m height, with long, straggling, slender branches. It is deciduous during the dry season. Its leaves are usually 10–50 mm long and 5–30 mm wide, and may vary in size, texture, colour and margin. It has small white flowers 8–10 mm in diameter with a 4–5 lobed corolla, and drupes 4–6 mm