Johannes Lingelbach [Public domain] via Wikimedia Commons
A key challenge in research on depression and other mood-related disorders is the availability of appropriate animal models. In addition to the difficulties inherent in assessing mood in animals, the fact that most studies are done in a controlled environment rather than a natural environment may confound interpretation of the results. Hence, some researchers have emphasized the need for behavioral models of mood disorders based on animals living under natural conditions.
Lab Anim. (NY) 41, 301 (2012).
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