• This displaced material stimulates hair cells most commonly in the posterior semicircular canal, occasionally in the lateral semicircular canal, and rarely in the superior semicircular canal, creating the illusion of motion. (msdmanuals.com)
  • One was observed around the ampulla of the superior semicircular canal and utricle, and the other was observed around the ampulla of the posterior semicircular canal. (bvsalud.org)
  • There are three semicircular canals that are oriented at nearly right angles to one another and are named the anterior (superior), lateral (horizontal) and posterior canals. (cdc.gov)
  • The 3 semicircular canals are small, ringlike structures: lateral or horizontal, superior or anterior, and posterior or inferior. (medscape.com)
  • Three long canals (anterior, posterior, and lateral) of the bony labyrinth. (lookformedical.com)
  • The anterior part of the saccule exhibits an oval thickening, the macula acustica sacculi, or macula, to which are distributed the saccular filaments of the vestibular branch of the vestibulocochlear nerve, also known as the statoacoustic nerve or cranial nerve VIII. (wikipedia.org)
  • The arterial supply of the auricle is composed of the posterior auricular artery, the anterior auricular branch of the superficial temporal artery, and the occipital artery, which also contributes. (medscape.com)
  • It consists of an anterior chamber and the cochlear duct, which subserves hearing and connects by way of the round saccule with the peripheral vestibular apparatus. (medscape.com)
  • The saccular macula is an elliptical thickened area of sensory epithelium that lies on the anterior vertical wall of the saccule. (medscape.com)
  • The macula of the utricle lies mainly in the horizontal plane and is located in the utricular recess, which is the dilated anterior portion of the utricle. (medscape.com)
  • The semicircular canals have five openings into the vestibule with one shared by the anterior and the posterior canals. (lookformedical.com)
  • The saccule is a bed of sensory cells in the inner ear. (wikipedia.org)
  • When the head moves vertically, the sensory cells of the saccule are disturbed and the neurons connected to them begin transmitting impulses to the brain. (wikipedia.org)
  • Within the utricle and saccule, the sensory cells are arranged in a flat plate of cells called a macula. (cdc.gov)
  • The otolithic membrane overlies each macula and is composed of numerous filaments and has a high content of acid mucopolysaccharides. (cdc.gov)
  • the posterior and the superior semicircular canals share one opening at the crus commune. (medscape.com)
  • They are oriented at right angles to each other and are situated so that the superior and posterior canals are at 45° angles to the sagittal plane and the horizontal canal is 30° to the axial plane. (medscape.com)
  • All canals merge into the utricle. (medscape.com)
  • The saccule is an almost globular-shaped sac that lies in the spherical recess on the medial wall of the vestibule. (medscape.com)
  • The utricle is larger than the saccule and lies posterosuperiorly to it in the elliptical recess of the medial wall of the vestibule. (medscape.com)
  • The vestibule contains two communicating sacs (utricle and saccule) of the balancing apparatus. (lookformedical.com)
  • For this reason, the saccule is sometimes called an "otolithic organ. (wikipedia.org)
  • The difference between them is that the utricle is more sensitive to horizontal acceleration, whereas the saccule is more sensitive to vertical acceleration. (wikipedia.org)
  • The utricle senses motion in the horizontal plane (eg, forward-backward movement, left-right movement, or a combination thereof). (medscape.com)
  • The mineralized otoconia were first detected in the utricle at P3 and saccular otoconia at P6. (bvsalud.org)
  • From the posterior wall of the saccule is given off a canal, the ductus endolymphaticus (endolymphatic duct). (wikipedia.org)
  • however, the superior canal is paired with the contralateral posterior canal and vice versa. (medscape.com)
  • The nonampulated ends of the superior and posterior canal form the crus commune or common crus. (medscape.com)
  • The arterial supply includes the posterior auricular artery, deep auricular branch of the maxillary artery, and superficial temporal artery. (medscape.com)
  • This duct is joined by the ductus utriculosaccularis, and then passes along the aquæductus vestibuli and ends in a blind pouch saccus endolymphaticus (endolymphatic sac) on the posterior surface of the petrous portion of the temporal bone, where it is in contact with the dura mater. (wikipedia.org)
  • The saccule detects linear accelerations and head tilts in the vertical plane. (wikipedia.org)
  • Within the utricle and saccule, the sensory cells are arranged in a flat plate of cells called a macula. (cdc.gov)
  • Whereas the first mostly supplies the utricle and both HSC and ASC, the latter mainly serves the saccule, PSC, and the cochlea, with slight possible interindividual differences. (audiologyonline.com)
  • The mineralized otoconia were first detected in the utricle at P3 and saccular otoconia at P6. (bvsalud.org)
  • The density of the utricle and saccular otoconia showed different growth trends. (bvsalud.org)
  • In turn, the CCA divides into the vestibulocochlear artery, which serves PSC, the saccule, and the cochlear basal turn, and in the main cochlear artery supplying the rest of the cochlear neuroepithelium. (audiologyonline.com)
  • Finally, the posterior vestibular artery generates from the vestibulo-cochlear artery, providing blood supply to both PSC and saccule. (audiologyonline.com)
  • The saccule detects linear accelerations and head tilts in the vertical plane. (wikipedia.org)
  • The descending part presents two openings through each of which a branch of the facial nerve passes: the nerve to stapedius enters the canaliculus for nerve to stapedius , and the chorda tympani enters the posterior canaliculus of chorda tympani ( canaliculus chordae tympani , or iter chordae posterius [7] ). (cloudfront.net)
  • : 745 The canal then curves nearly vertically inferior-ward along the posterior wall . (cloudfront.net)
  • The structures that enable the saccule to gather this vestibular information are the hair cells. (wikipedia.org)
  • This duct is joined by the ductus utriculosaccularis, and then passes along the aquæductus vestibuli and ends in a blind pouch saccus endolymphaticus (endolymphatic sac) on the posterior surface of the petrous portion of the temporal bone, where it is in contact with the dura mater. (wikipedia.org)
  • From the lower part of the saccule a short tube, the canalis reuniens of Hensen, passes downward and opens into the ductus cochlearis near its vestibular extremity. (wikipedia.org)
  • Both the utricle and the saccule provide information about acceleration. (wikipedia.org)
  • The saccule, like the utricle, provides information to the brain about head position when it is not moving. (wikipedia.org)