Circadian activity

Meijer, J. H., van der Zee, E. A. Dietz, M. (1988). Glutamate phase shifts circadian activity rhythms in hamsters. Neurosci. Lett. 86, 177-83. 

Koehl, M. et al., Prenatal stress alters circadian activity of hypothalamo-pituitary-adrenal axis and hippocampal corticosteroid receptors in adult rats of both genders, J. Neurobiol., 40, 302, 1999. 

Internally generated behavior includes observation of animal behavior in response to various experimental situations, and includes exploratory behavior, circadian activity, social behavior, and so on. The performance of animals treated with a particular chemical is compared with that of untreated controls as a measure of the effect of the chemical. 

HT7-Receptor-Induced Phase Shift in Suprachiasmatic Nucleus Circadian Activity... 

Tobler I, Gaus SE, Deboer T, Achermann P, Fischer M, Rulicke T, Moser M, Oesch B, McBride PA, Manson JC (1996) Altered circadian activity rhythms and sleep in mice devoid of prion protein. Nature 380 639-642. 

The prion protein PrP represents a central player in transmissible spongiform encephalopathies (TSEs), also known as prion diseases (for review see Lasmezas and Weiss, 2000)). The physiological role of the cellular isoform of PrP termed PrP is speculative so far (for review see (Weissmann, 1996)) and might involve control of circadian activity rhythms and sleep (Tobler et ai, 1996), maintenance of cerebellar Purkinje cell (Sakaguchi et al, 1996), and normal synaptic functions (Collinge et al., 1994 Fournier et al., 1995 Kitamoto et al., 1992). Because several reports do not describe any phenotype for PrP (Bueler et al, 1992 Lledo et al, 1996 Manson et al., 1994), the only proved role of prpc is its necessity for the development of TSEs (Bueler et al., 1993)... 

Kempainnen, R. J., and J. J. Sartin. 1984. Evidence for episodic but not circadian activity in plasma concentrations of adrenocorticotrophin, cortisol and thyroxine in dogs. Endocrinology 103 219-226. 

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