This area has a few medium sized neurons scattered among the fibres of the dorso-medial division of the medial forebrain bundle (Gurdjian, 1927, Swanson, 1976a, Bleier et al., 1979) The central part of this area contains mainly fibres and is termed as para preoptic of medial forebrain bundle (MFB) The medial part, termed the preoptic nucleus contains fibres and many neurons (Gurdjian, 1927, Jacobwitz and Palkovits, 1974, Swanson, 1976a, Bleier...