The human brain lacks a sleep regulating structure.
Keith Harper -LRB- 12 July 1927 -- 12 August 1997 -RRB- was an Australian rules footballer who played for Perth in the West Australian National Football League -LRB- WANFL -RRB- during the late 1940s and 1950s .. Perth. Perth Football Club. West Australian National Football League. West Australian Football League. His younger brother Roy also played with the club .