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  • canal
  • The utricle and saccule communicate with each other by means of a Y-shaped canal. (wikipedia.org)
  • In the early phase, Wnt/β-catenin signaling is required to preserve the epithelial integrity of the vertical canal pouch perimeter (presumptive anterior and posterior SSCs) by establishing a sensory-dependent signaling relay that maintains expression of Dlx5 and opposes expression of the fusion plate marker netrin 1. (biologists.org)
  • This displaced material stimulates hair cells most commonly in the posterior semicircular canal (and rarely in the superior semicircular canal), creating the illusion of motion. (merckmanuals.com)
  • while the superior canal of one ear is nearly parallel to the posterior canal of the other. (wikipedia.org)
  • The posterior semicircular canal is a part of the vestibular system that detects rotation of the head around the left-right (frontal) axis, or in other words rotation in the coronal plane. (wikipedia.org)
  • The posterior canal is part of the bony labyrinth and is used by the vestibular system to detect rotations of the head in the coronal plane. (wikipedia.org)
  • At the base of each canal, the bony region of the canal is enlarged which opens into the utricle and has a dilated sac at one end called the osseous ampullae. (wikipedia.org)
  • duct
  • 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)
  • 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)
  • whereas
  • Utricle responds to linear accelerations and head-tilts in the horizontal plane (head to shoulder), whereas saccule responds to linear accelerations and head-tilts in the vertical plane (up and down). (wikipedia.org)
  • auditory
  • Research has shown, like songbirds, females in some species of fish show seasonal variation in auditory processing and the sensitivity of the saccule of females peaks during the breeding season. (wikipedia.org)
  • head
  • The initial head tilt to right will cause stimulation of the right utricle resulting in excitory signals to pass to the SR and SO (right eye), and IO and IR (left eye). (wikipedia.org)
  • In case of any lesion from the utricle to the brainstem, diminished input from the affected vestibular pathway, for example the left vestibular is the same as stimulation of right vestibular pathway, resulting in the erroneous interpretation by the brain that the head is tilted to the right and consequently that the SVV is tilted to the left. (wikipedia.org)
  • The saccule translates head movements into neural impulses which the brain can interpret. (wikipedia.org)
  • The saccule, like the utricle, provides information to the brain about head position when it is not moving. (wikipedia.org)
  • consists
  • The pinna consists of a single piece of elastic cartilage with a complicated relief on its inner surface and a fairly smooth configuration on its posterior surface. (wikipedia.org)
  • skull
  • The anterior surface forms the posterior part of the middle cranial fossa of the base of the skull, and is continuous with the inner surface of the squamous portion, to which it is united by the petrosquamous suture, remains of which are distinct even at a late period of life. (wikipedia.org)
  • The posterior surface forms the anterior part of the posterior cranial fossa of the base of the skull, and is continuous with the inner surface of the mastoid portion. (wikipedia.org)
  • bone
  • It is directed superiorly, as per its nomenclature, and posteriorly, nearly parallel to the posterior surface of the petrous bone. (wikipedia.org)
  • it extends to the posterior surface of the petrous portion of the temporal bone. (wikipedia.org)
  • neck
  • The talonavicular ligament stretches between the posterior surfaces of the neck of the talus and the navicular bone. (anatomynext.com)
  • The anterior and middle scalene muscles lift the first rib and bends the neck to the same side as the contracting muscle, while the posterior scalene muscle lifts the second rib and flexes the neck to the same side. (anatomynext.com)
  • 1964) and subsequently Townsend and Cody, provided evidence for a short latency response in posterior neck muscles in response to loud clicks that appeared to be mediated by activation of the vestibular apparatus. (wikipedia.org)
  • surface
  • It is directed superiorly, as per its nomenclature, and posteriorly, nearly parallel to the posterior surface of the petrous bone. (wikipedia.org)
  • The pinna consists of a single piece of elastic cartilage with a complicated relief on its inner surface and a fairly smooth configuration on its posterior surface. (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)
  • The anterior surface forms the posterior part of the middle cranial fossa of the base of the skull, and is continuous with the inner surface of the squamous portion, to which it is united by the petrosquamous suture, remains of which are distinct even at a late period of life. (wikipedia.org)
  • The posterior surface forms the anterior part of the posterior cranial fossa of the base of the skull, and is continuous with the inner surface of the mastoid portion. (wikipedia.org)
  • it extends to the posterior surface of the petrous portion of the temporal bone. (wikipedia.org)
  • tube
  • 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)
  • away
  • A mass arising from the paraspinal portion displaces the paraspinal musculature and posterior cervical space fat away from the spine. (radiopaedia.org)
  • space
  • The perivertebral space is a cylinder of soft tissue lying posterior to the retropharyngeal space and danger space surrounded by the prevertebral layer of the deep cervical fascia and extends from the skull base to the upper mediastinum. (radiopaedia.org)
  • body
  • The body of the maxilla is roughly pyramidal and has four surfaces that surround the maxillary sinus, the largest paranasal sinus: anterior, infratemporal (posterior), orbital and nasal. (radiopaedia.org)