Anchusa Anchusa The genus Anchusa belongs to the tribe Boragineae of the borage family (Boraginaceae). It includes about 40 species. These species grow in Europe, North Africa, South Africa and Western Asia. They are introduced in the United States. They consist of annual plants, biennial plants and perennial plants with the general characteristics of the borage family. They are generally herbs, covered with bristly hairs. The leaves are simple or undulate, covered with stiff hairs. The small radially symmetrical flowers are sapphire blue and retain their colour a long time. The plants show numerous flowers with 5 sepals, united at their
Colour centre ventral occipital area plays an important role in colour vision. The search for the human equivalent of V4 led to the discovery of other areas that were stimulated by colour. The most significant was an area anterior in the ventral occipital lobe, subsequently named V4α. Further fMRI experiments found that V4α had a different function than V4, but worked cooperatively with it. V4α is involved in a number of processes, and is active during tasks requiring colour ordering, imagery, knowledge about colour, colour illusions, and object colour. The V4 and V4α areas are separate entities, but because of their close