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
Colour guard of Nations are expected to lower their flags to the ground in full and regular salutes in ceremonies and parades. Civilians should stand during such times and soldiers are expected to salute them when not in formation. As the British Army, the Royal Air Force, the Royal Marines and the Royal Navy have several types of colours, there are also colour guards for these colours and these colours and their colour guards are as follows: In the cavalry, the Queen's Standard or Guidon and the Regimental/Squadron Standard or Guidon (for the light cavalry only) are the equivalents to the Queen's