2010 Fiscal Year Final Research Report
Neurophysiological and neuroanatomical analyses of brain mechanisms subserving spontaneous initiation of behavior in invertebrates
| Project/Area Number |
20370028
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Animal physiology/Animal behavior
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| Research Institution | Hokkaido University |
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Principal Investigator |
TAKAHATA Masakazu Hokkaido University, 大学院・理学研究院, 教授 (10111147)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 行動生理 / 神経行動 / 神経生物 |
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| Research Abstract |
Extracellular recordings from the brain of crayfish, Procambarus clarkii, fixed on a sphere-type treadmill have revealed for the first time in invertebrates that a specific set of descending interneurons show a noticeable increase in their spike activity, i.e., the readiness activity, before the animal spontaneously initiates locomotor behavior. Using intracellular recording and staining techniques, we could identify those readiness discharge neurons by characterizing their physiological and morphological features in the brain. Furthermore, we showed that the readiness activity is shaped by sequential synaptic excitation and inhibition.
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