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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Life Science / Faculty of Advanced Life Science >
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Chronic electromyographic analysis of circadian locomotor activity in crayfish
| Title: | Chronic electromyographic analysis of circadian locomotor activity in crayfish |
| Authors: | Tomina, Yusuke Browse this author | | Kibayashi, Akihiro Browse this author | | Yoshii, Taishi Browse this author | | Takahata, Masakazu Browse this author →KAKEN DB |
| Keywords: | Walking behavior | | Motor command | | Behavioral initiation | | Reflexiveness | | Spontaneity | | Invertebrate | | Crustacean |
| Issue Date: | 15-Jul-2013 |
| Publisher: | Elsevier Science BV |
| Journal Title: | Behavioural Brain Research |
| Volume: | 249 |
| Start Page: | 90 |
| End Page: | 103 |
| Publisher DOI: | 10.1016/j.bbr.2013.04.029 |
| PMID: | 23631885 |
| Abstract: | Animals generally exhibit circadian rhythms of locomotor activity. They initiate locomotor behavior not only reflexively in response to external stimuli but also spontaneously in the absence of any specific stimulus. The neuronal mechanisms underlying circadian locomotor activity can, therefore, be based on the rhythmic changes in either reflexive efficacy or endogenous activity. In crayfish Procambarus clarkii, it can be determined by analyzing electromyographic (EMG) patterns of walking legs whether the walking behavior is initiated reflexively or spontaneously. In this study, we examined quantitatively the leg muscle activity that underlies the locomotor behavior showing circadian rhythms in crayfish. We newly developed a chronic EMG recording system that allowed the animal to freely behave under a tethered condition for more than 10 days. In the LD condition in which the animals exhibited LD entrainment, the rhythmic burst activity of leg muscles for stepping behavior was preceded by non-rhythmic tonic activation that lasted for 1323 +/- 488 ms when the animal initiated walking. In DD and LL free-running conditions, the pre-burst activation lasted for 1779 +/- 31 and 1517 +/- 39 ms respectively. In the mechanical stimulus-evoked walking, the pre-burst activation ended within 79 +/- 6 ms. These data suggest that periodic changes in the crayfish locomotor activity under the condition of LD entrainment or free-running are based on activity changes in the spontaneous initiation mechanism of walking behavior rather than those in the sensori-motor pathway connecting mechanoreceptors with leg movements. (c) 2013 Elsevier B.V. All rights reserved. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/53090 |
| Appears in Collections: | 生命科学院・先端生命科学研究院 (Graduate School of Life Science / Faculty of Advanced Life Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 冨菜 雄介
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