The gonadal steroids, testosterone and estradiol, are known to be important
modulators of neuronal functions and behaviors in most vertebrate species. These
steroid hormones also elicit changes in neuropeptide synthesis and secretion, alter
specific neurohormone receptor levels, and alter neuronal morphology and
electrophysiology. Many of the actions of androgens and...
The main objectives of the current study were to obtain the complete cDNA sequence of an opioid-like receptor from an amphibian, the roughskin newt, Taricha granulosa, and investigate the receptor's tissue distribution and regulation following chronic exposure to the glucocorticoid corticosterone (CORT). Degenerate primers designed in highly conserved regions of...
In addition to the well-characterized genomic mechanism of steroid action that uses
intracellular receptors, steroid hormones also signal through nongenomic processes
that use membrane receptors. A membrane receptor for corticosterone (CORT) has
been described in brains of the roughskin newt (Taricha granulosa). This receptor is
believed to be a G-protein...
To quantify the reproductive behavior of male and female gray-tailed
voles, Microtus canicaudus, under conditions of natural
estrus, sexually experienced pairs were observed in a standardized
behavior test for 10 hours. The total duration of sexual
interactions averaged 223 minutes, which is considerably longer than
previously published reports on microtines....
In nature, animals survive threats by responding physiologically and behaviorally in ways that are appropriate to the situation. Which responses are appropriate depend on the animals' surroundings and current physiological and behavioral state. This dissertation investigated the neuroendocrine mechanisms that control context-dependent behavioral responses to stress by focusing on the...