“…In various studies no stimulation has been demonstrated (Wu andMiltner 1937, Keck andKelly 1965), while others have reported a slight stimulation (Pearse and Morton 1930, Bergmann 1931, Kishikawa 1936, Servelle 1948, Hutchinson and Burdeaux 1954, Colt and Iger 1963. In various studies no stimulation has been demonstrated (Wu andMiltner 1937, Keck andKelly 1965), while others have reported a slight stimulation (Pearse and Morton 1930, Bergmann 1931, Kishikawa 1936, Servelle 1948, Hutchinson and Burdeaux 1954, Colt and Iger 1963.…”