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(New page: {{BioPsy}} {{Infobox Anatomy | Name = {{PAGENAME}} | Latin = canalis semicircularis lateralis | GraySubject = 232 | GrayPage = 1049 | Image = Gray921.p...)
 
 
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The '''lateral or horizontal canal''' (external semicircular canal) is the shortest of the three canals.
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The '''lateral or horizontal canal''' (external semicircular canal) is the shortest of the three canals. Movement of fluid within this canal corresponds to rotation of the head around a vertical axis (i.e. the neck).
   
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==Structure==
 
It measures from 12 to 15 mm., and its arch is directed horizontally backward and lateralward; thus each semicircular canal stands at right angles to the other two.
 
It measures from 12 to 15 mm., and its arch is directed horizontally backward and lateralward; thus each semicircular canal stands at right angles to the other two.
   
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{{Vestibular system}}
 
{{Vestibular system}}
[[Category:Vestibular system]]
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[[Category:Balance]]
 
 
{{enWP|Horizontal semicircular canal}}
 
{{enWP|Horizontal semicircular canal}}

Latest revision as of 09:17, December 27, 2008

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Horizontal semicircular canal
Gray921
Interior of right osseous labyrinth.
Latin canalis semicircularis lateralis
Gray's subject #232 1049
System
MeSH A09.246.631.663
[[Image:{{{Image2}}}|190px|center|]]
{{{Caption2}}}

The lateral or horizontal canal (external semicircular canal) is the shortest of the three canals. Movement of fluid within this canal corresponds to rotation of the head around a vertical axis (i.e. the neck).

StructureEdit

It measures from 12 to 15 mm., and its arch is directed horizontally backward and lateralward; thus each semicircular canal stands at right angles to the other two.

Its ampullated end corresponds to the upper and lateral angle of the vestibule, just above the fenestra vestibuli, where it opens close to the ampullated end of the superior canal; its opposite end opens at the upper and back part of the vestibule.

The lateral canal of one ear is very nearly in the same plane as that of the other; while the superior canal of one ear is nearly parallel to the posterior canal of the other.

See alsoEdit

Additional imagesEdit

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.


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