Periodicity in the growth and shedding of hair.

  title={Periodicity in the growth and shedding of hair.},
  author={M. Courtois and Genevi{\`e}ve Loussouarn and S Hourseau and J F Grollier},
  journal={The British journal of dermatology},
  volume={134 1},
Ten men, with or without alopecia, were observed for a period of between 8 and 14 years using phototrichograms on a precisely located zone on the vertex of the scalp. Among the various parameters observed, we chose the percentage of hairs in telogen as the criterion for assessment of hair shedding. Mathematical analysis of the variations in this telogen percentage was carried out for each individual subject and for the whole group, as represented by the population mean (or the 'average subject… CONTINUE READING