Steroid hormone activation of wandering in the isolated nervous system of Manduca sexta.

Steroid hormone activation of wandering in the isolated nervous system of Manduca sexta. Research Abstract Details 

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Steroid hormone activation of wandering in the isolated nervous system of Manduca sexta. Abstract Text:

Julie E Miller,Richard B Levine,

Steroid hormones modulate motor circuits in both vertebrates and invertebrates. The insect Manduca sexta, with its well-characterized developmental and endocrinological history, is a useful model system in which to study these effects. Wandering is a stage-specific locomotor behavior triggered by the steroid hormone 20-hydroxyecdysone (20E), consisting of crawling and burrowing movements as the animal searches for a pupation site. This study was undertaken to determine whether the wandering motor pattern is activated by direct action of 20E on the CNS. 20E acts on the isolated larval nervous system to induce a fictive motor pattern showing features of crawling and burrowing. The latency of the response to 20E is long, suggestive of a genomic mechanism of action. The abdominal motoneurons or segmental pattern generating circuits are unlikely to be the primary targets of 20E action in inducing fictive wandering. Exposure of the segmental ganglia alone to hormone did not evoke fictive wandering. Therefore, as suggested by an earlier study, the likely site of 20E action is within the brain.

Steroid hormone activation of wandering in the isolated nervous system of Manduca sexta. Publishing Authors By Initials

JE Miller,RB Levine,

For similar natural sciences: time: time factors research abstracts see: natural sciences: time: time factors research

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Steroid hormone activation of wandering in the isolated nervous system of Manduca sexta. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Journal of comparative physiology. A, Neuroetholog

VOLUME: 192

Page Numbers: 1049-62

Journal Abbreviation: J. Comp. Physiol. A Neuroethol

ISSN: 0340-7594

DAY: 20

MONTH: 06

YEAR: 2006

Steroid hormone activation of wandering in the isolated nervous system of Manduca sexta. Information

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LANGUAGE: eng

NlmUniqueID: 101141792

Steroid hormone activation of wandering in the isolated nervous system of Manduca sexta. Keywords Mesh Terms:

KEYWORDS: Time Factors

MESH TERMS: drug effects

Chemical & Substance for Abstract: Steroid hormone activation of wandering in the isolated nervous system of Manduca sexta. Information

Substance Name: Ecdysterone

Registry Number: 5289-74-7

Grant and Affiliation Information for Steroid hormone activation of wandering in the isolated nervous system of Manduca sexta.

AFFILIATION: Division of Neurobiology, University of Arizona, Tucson, AZ 85721, USA. jem2@ucla.edu

Country: Germany

AGENCY: United States NINDS

GRANT: TS32NS07309

ACRONYM: NS

MEDLINETA: J Comp Physiol A Neuroethol Se

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