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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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Formato: | Texto |
Lenguaje: | English |
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The Rockefeller University Press
1935
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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. |
collection | PubMed |
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. |
format | Text |
id | pubmed-2141391 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1935 |
publisher | The Rockefeller University Press |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT crozierwj onthegeotropicorientationofhelix |