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
Orange (colour) problems. Orange also had and continues to have a political dimension. Orange serves as the colour of Christian democratic political ideology, which is based on Catholic social teaching and Neo-Calvinist theology; Christian democratic political parties came to prominence in Europe and the Americas after World War II. In Ukraine in November–December 2004, it became the colour of the Orange Revolution, a popular movement which carried activist and reformer Viktor Yushchenko into the presidency. In parts of the world, especially Northern Ireland, the colour is associated with the Orange Order, a Protestant fraternal organisation and relatedly, Orangemen, marches and other social