@article{oai:miyazaki-u.repo.nii.ac.jp:00000374,
 author = {村上, 昇 and Murakami, Noboru and 幸野, 亮太 and 中原, 桂子 and Nakahara, Keiko and Ida, Takanori and 井田, 隆徳 and 黒田, 治門 and Kuroda, Haruto and Kono, Ryota and Ida, Takanori and 井田, 隆徳},
 issue = {7},
 journal = {The journal of veterinary medical science},
 month = {Jul},
 note = {Chipmunks that had been housed at 22℃ under a light-dark cycle of 14L:10D for at least one year were exposed to a short photoperiod （10L:14D） and low temperature to induce unseasonable hibernation. We were able to induce hibernation at any time of year and there was no significant difference in the duration of the hibernation bout, the duration of interbout euthermia and duration of bouts of torpor throughout the year, however entrance into hibernation took about 60 days in summer but only about 30 days in any other seasons. In addition, interbout euthermia predominantly occurred during the light phase in winter, whereas in spring interbout euthermia occurred equally in the light and dark phases. These results suggest that both the circadian and circannual systems are linked to hibernation in chipmunks. Subcutaneous infusion of a serotonin antagonist, papa-chlorophenylalanine （PCPA）, facilitated entrance into and interrupted hibernation in aroused and hibernating chipmunks in summer, respectively. On the other hand, opioid antagonist, naloxone, did not affect hibernation, but extended the period of interbout euthermia. These results suggest that the role of serotonin in entrance into and maintenance of hibernation in chipmunks is independent of the circannual system, and that opioid system may not be involved in hibernation in chipmunks., 一年以上の間, 室温22度, 14時間明:10時間暗の照明条件下で飼育されたシマリスを短日照明（10時間明:14時間暗）と低温条件に暴露することにより季節外冬眠を誘起した.我々は一年のどの時期でもこの季節外冬眠を誘起できた.この季節外冬眠は季節間において, 冬眠一党醒インターバルや, それぞれの冬眠や覚醒時間には有意な差を認めなかったが, 冬眠に入るまでの期間の長さにおいて夏のみ約60日を要し, 他の季節の平均30日より長かった.さらに, 覚醒インターバルでの覚醒時刻は冬では明期に起こるのに対し, 春では明期と暗期でほぼ等しい割合で起こった.これらの結果はシマリスの冬眠がサーカディアンリズム（概日リズム）とサーカニュアルリズム（概年リズム）の両者にリンクしていることを示唆している.夏の季節外冬眠において, セロトニン枯渇剤であるパラクロロフェニルアラニン（PCPA）の冬眠中での慢性投与は冬眠を阻止し, 非冬眠動物への投与は逆に冬眠を誘発した.一方, オピオイドのアンタゴニストであるナロキソンの投与は覚醒時間の延長を起こした.これらの結果は, セロトニンによる冬眠誘超や維持機構がサーカニュアル（概年リズム）システムと独立したものであることを示唆している.},
 pages = {763--766},
 title = {Induction of Unseasonable Hibernation and Involvement of Serotonin in Entrance into and Maintenance of Its Hibernation of Chipmunks T. asiaticus},
 volume = {62},
 year = {2000},
 yomi = {ムラカミ, ノボル and コウノ, リョウタ and ナカハラ, ケイコ and イダ, タカノリ and クロダ, ハルト and イダ, タカノリ}
}