Circadian Rhythms in Locomotor Activity of the Hagfish, Eptatretus burgeri III. Hypothalamus: a Locus of the Circadian Pacemaker? : Behavior Biology

概要

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By recording the locomotor activity rhythms of hagfish in which partial ablations in brain were made, this work was designed to determine the location of the circadian pacemaker. The characteristic rhythms were maintained in the absence of the optic tectum, but were lost in animal lacking the telencephalon or diencephalon. The telencephalon-diencephalon unit was more finely dissected for more precise localization. The rhythm still occurred without the upper or the lateral parts of this anatomical unit. Transecting the middle of the telencephalon had no effect on the rhythms displayed. These findings suggest that a crucial part (circadian pacemaker?) for the fish to be rhythmic may be in the ventromedial part of telencephalon-diencephalon, the hypothalamus, the frontal part of which extends under the telencephalon.
社団法人日本動物学会の論文
1988-04-15