Notably, the mutant mice also showed periodic changes in locomotor activity in their home cages with an approximate cycle length of 10 - 20 days. (sciencedaily.com)
Sensitization of Locomotor Activity in the mouse as a Potential Indicator of Abuse Liability B.J. CALDARONE, C.M. RUIZ, M.L. MANZANO, A.C. FEDOLAK, J. ZHOU, B. OLIVIER... Abstracts / Posters (psychogenics.com)
This is the first evidence that a mutation in a non-coding region of the genome is able to influence the period of circadian locomotor activity. (sciencedaily.com)