BEHAVIORAL ENDOCRINOLOGY With an Emphasis on Aggression Earliest behavioral endocrinologists: - farmers - ranchers Reasons for Calf Castration produce tame oxen for draught purposes prevent mating and reproduction after the age of puberty decrease aggressiveness, mounting activity, injuries Without Castration ?? Who has more testosterone … Man or Bull? NERVOUS SYSTEM - controls other systems - influences behavior ENDOCRINE SYSTEM? Clean, discrete integrated system Messy, diverse disarticulated System Exocrine Gland Endocrine Gland AP (lightening quick) Neural Event Milliseconds Endocrine Event Neuron Non-neural Endocrine Cell 1 * * 3 2