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ON THE GEOTROPIC ORIENTATION OF HELIX

The snail Helix nemoralis in negatively geotropic creeping orients upward upon an inclined surface until the angle of the path of progression (θ) is related to the tilt of the surface (α) as (Δ sin θ) (Δ sin α) = – const.; θ is very nearly a rectilinear function of log sin α. The precision of orient...

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Detalles Bibliográficos
Autor principal: Crozier, W. J.
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1935
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2141391/
https://www.ncbi.nlm.nih.gov/pubmed/19872874
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author Crozier, W. J.
author_facet Crozier, W. J.
author_sort Crozier, W. J.
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description The snail Helix nemoralis in negatively geotropic creeping orients upward upon an inclined surface until the angle of the path of progression (θ) is related to the tilt of the surface (α) as (Δ sin θ) (Δ sin α) = – const.; θ is very nearly a rectilinear function of log sin α. The precision of orientation (P.E.(θ)) declines in proportion to increasing sin α, P.E.(θ)/(θ) in proportion to θ. These facts are comprehensible only in terms of the view that the limitation of orientation is controlled by the sensorial equivalence of impressed tensions in the anterior musculature.
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spelling pubmed-21413912008-04-23 ON THE GEOTROPIC ORIENTATION OF HELIX Crozier, W. J. J Gen Physiol Article The snail Helix nemoralis in negatively geotropic creeping orients upward upon an inclined surface until the angle of the path of progression (θ) is related to the tilt of the surface (α) as (Δ sin θ) (Δ sin α) = – const.; θ is very nearly a rectilinear function of log sin α. The precision of orientation (P.E.(θ)) declines in proportion to increasing sin α, P.E.(θ)/(θ) in proportion to θ. These facts are comprehensible only in terms of the view that the limitation of orientation is controlled by the sensorial equivalence of impressed tensions in the anterior musculature. The Rockefeller University Press 1935-05-20 /pmc/articles/PMC2141391/ /pubmed/19872874 Text en Copyright © Copyright, 1935, by The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Crozier, W. J.
ON THE GEOTROPIC ORIENTATION OF HELIX
title ON THE GEOTROPIC ORIENTATION OF HELIX
title_full ON THE GEOTROPIC ORIENTATION OF HELIX
title_fullStr ON THE GEOTROPIC ORIENTATION OF HELIX
title_full_unstemmed ON THE GEOTROPIC ORIENTATION OF HELIX
title_short ON THE GEOTROPIC ORIENTATION OF HELIX
title_sort on the geotropic orientation of helix
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2141391/
https://www.ncbi.nlm.nih.gov/pubmed/19872874
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