the highest concentrations of acth and alpha-msh were found in the diencephalon ( hypothalamus 4.2 and 12.5 pmol/g wet weight , respectively ) and in midbrain ( periaqueductal gray 0.5 and 1.7 pmol/g , respectively ) and smaller quantities in the rhombencephalon and telencephalon .
C0012144
diencephalon
C0020663
hypothalamus