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Modification of statocyst input to local interneurons by behavioral condition in the crayfish brain

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Title: Modification of statocyst input to local interneurons by behavioral condition in the crayfish brain
Authors: Hama, N. Browse this author
Takahata, M. Browse this author
Keywords: Statocyst
Local interneurons
Crayfish
Brain
Response modulation
Issue Date: Aug-2005
Publisher: Springer Berlin / Heidelberg
Journal Title: Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology
Volume: 191
Issue: 8
Start Page: 747
End Page: 759
Publisher DOI: 10.1007/s00359-005-0630-z
PMID: 15856256
Abstract: Posture control by statocysts is affected by leg condition in decapod crustaceans. We investigated how, in the crayfish brain, the synaptic response of local interneurons to statocyst stimulation was affected by leg movements on and off a substratum. The magnetic field stimulation method permitted sustained stimulation of statocyst receptors by mimicking body rolling. The statocyst-driven local interneurons were classified into four morphological groups (Type-I–IV). All interneurons except Type-IV projected their dendritic branches to the parolfactory lobe of the deutocerebrum where statocyst afferents project directly. Type-I interneurons having somata in the ventral-paired lateral cluster responded invariably to statocyst stimulation regardless of the leg condition, whereas others having somata in the ventral-unpaired posterior cluster showed response enhancement or suppression, depending on the cell, during leg movements on a substratum, but no response change during free leg movements off the substratum. The synaptic responses of Type-II and IV interneurons were also affected differently by leg movements depending on the substratum condition, whereas those of Type-III remained unaffected. These findings suggest that the statocyst pathway in the crayfish brain is organized in parallel with local circuits that are affected by leg condition and those not affected.
Rights: The original publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/16954
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高畑 雅一

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