Research in Dr. Urbanski's laboratory is focused on two major hypothalamic neural circuits: (1) those responsible for maintaining rhythmic biological functions (e.g., circadian hormone rhythms and the sleep-wake cycle), and (2) those responsible for maintaining normal reproductive function (e.g., puberty, ovulation, and menopause). His primary goal is to elucidate the molecular and cellular mechanisms that underlie these physiological functions, and to understand how they are influenced by various hormones and by changes in the external environment.