The human hypothalamus is subdivided into some 20 well-defined nuclei that
have a multitude of specific functions from the time of birth to the moment
we die. Hypothalamic nuclei show structural and functional differences not
only in relation to classic neuroendocrine disorders, such as diabetes ins
ipidus, climacteric flushes and Kallwtan's syndrome, but also in relation t
o gender and sexual orientation, to adaptive precesses such as non-thyroida
l illness and in psychiatric disorders such as depression.