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Encyclopedia > Utricle (ear)
Utricle (ear)
illustration of otolith organs showing detail of utricle, ococonia, endolymph, cupula, macula, hair cell filaments, and saccular nerve
Components of the inner ear including the utricle
Latin utriculus
Gray's subject #232 1051
MeSH Saccule+and+Utricle
Dorlands/Elsevier u_04/12841370

The utricle, larger than the saccule, is of an oblong form, compressed transversely, and occupies the upper and back part of the vestibule, lying in contact with the recessus ellipticus and the part below it. http://www. ... Otolith organ Utricle is also a fruit type, found in beet and dock. ... Endolymph is the fluid contained in the membranous labyrinth of the inner ear. ... The cupula forms the apex of the cochlea. ... Human eye cross-sectional view. ... Hair cells are the sensory cells of both the auditory system and the vestibular system in all vertebrates. ... Image File history File links Bony_labyrinth. ... The posterior semicircular canal, vertical like the superior, is directed backward, nearly parallel to the posterior surface of the petrous bone; it is the longest of the three canals, measuring from 18 to 22 mm. ... The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ... The lateral or horizontal canal (external semicircular canal) is the shortest of the three canals. ... The cochlea is the auditory branch of the inner ear. ... Categories: Stub ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... Elseviers logo. ... Categories: Stub ...

The utricle contains mechanoreceptors called hair cells that distinguish between degrees of tilting of the head grace to their apical cilia set-up. These are covered by otolith and, once you tilt your head, otolith viscosity has the cilia tilt as well. Depending on whether the tilt is in the direction of the kinocilium or not, the resulting hair cell polarisation is excitatory (depolarising) or inhibitory (hyperpolarisation), respectively. This signal to the vestibular nerve (which takes it to the brainstem) does not adapt with time, so if you're lying in bed, you still feel as if you're lying in bed 9 hours afterwards when you wake up. An otolith, or otoconium is a [[[calcium]] carbonate structure in the saccule or utricle of the inner ear (hence the name otolith, or ear-stone). It can be used for age determination, showing rings of different growth summer/winter, like tree rings. ...

That portion which is lodged in the recess forms a sort of pouch or cul-de-sac, the floor and anterior wall of which are thickened, and form the macula acustica utriculi, which receives the utricular filaments of the acoustic nerve. The vestibulocochlear nerve is the eighth of twelve cranial nerves, and also known as the auditory nerve. ...

The cavity of the utricle communicates behind with the semicircular ducts by five orifices.

From its anterior wall is given off the ductus utriculosaccularis, which opens into the ductus endolymphaticus.

See also

An otolith, or otoconium is a [[[calcium]] carbonate structure in the saccule or utricle of the inner ear (hence the name otolith, or ear-stone). It can be used for age determination, showing rings of different growth summer/winter, like tree rings. ...

Additional images

External links

  • Diagram at ipfw.edu

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. The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy after Henry Gray, is an anatomy textbook widely regarded as a classic work on human anatomy. ...



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