@inproceedings{oai:repo.qst.go.jp:00082284, author = {Kazuma, Sakamoto (Hiroshima Univ.) and Hiroki, Yamashita (Hiroshima. Univ.) and Zu, Soh (Hiroshima Univ.) and Michiyo, Suzuki and Toshio, Tsuji (Hiroshima Univ.) and Michiyo, Suzuki}, book = {Proceedings of 26th International Symposium on Artificial Life and Robotics (AROB 26th 2021)}, month = {Jan}, note = {The nematode Caenorhabditis elegans is a multicellular organism with a length of approximately 1.0 mm, and although they have a very simple structure with approximately 1,000 cells, they can move according to diverse environmental stimuli. Research has been conducted to investigate the mechanism of C. elegans movement; however, the relationship between muscle activity and local body bends has not been fully clarified. In this study, we employed a transgenic strain of C. elegans expressing fluorescent proteins on its body wall muscle to measure the fluorescence intensity corresponding to muscle activity and analyze their relation to local body-bending angles. Specifically, we performed a multiple regression analysis to calculate the partial correlation of the fluorescence rate of the body wall muscles against the local bending angles, bending angular velocities, and bending angular accelerations. The partial regression coefficients showed that the fluorescence rate was mainly correlated with the local bending angles. This finding indicated that the stiffness effect was dominant in driving the body.}, pages = {96--100}, title = {Multiple Regression Analysis to Reveal Relationships between Muscle Activities and Body Bends in a Transgenic Caenorhabditis elegans}, year = {2021} }