This volume contains papers presented at the Fifth International Symposium on Intra cranial Pressure held on May 30-June 3,1982, in Tokyo, Japan. The Symposium has continued to grow since it began in 1972, and this year it was comprised 121 oral and 46 poster presentations. This considerable number was chosen from the more than 216 abstracts that were received, which made the selection process very difficult. We would like to thank the Program Committee for their efforts. One hundred and fifty-one of the manuscripts are printed here. The classic papers, short communications, and the...