Remember the days when hair needed 100 brush strokes a day to keep it in tip-top condition?  With the advent of modern shampoos, hair needs brushing for styling and neatness only.  Brushing helps to dislodge particles of dust and dirt from the hair and massages the scalp to promote blood circulation whilst encouraging hair growth.  Brushing also helps distribute natural oils along the hair shaft, to smooth hair cuticles and add shine.