• The vestibule contains two communicating sacs (utricle and saccule) of the balancing apparatus. (bvsalud.org)
  • The vestibule contains a pair of membranous sacs: the saccule (sacculus) and the utricle (utriculus). (medscape.com)
  • The vestibular system consists of the three semicircular canals and two sacs called the saccule and the utricle. (weilab.com)
  • In addition, the maculae of the utricle and saccule were partially fused. (biologists.com)
  • The maculae of the utricle and saccule are nearly perpendicular to one another. (cdc.gov)
  • The peripheral branches of the bipolar cells in the vestibular ganglion course from the specialized receptors (hair cells) in the ampullae and from the maculae of the utricle and the saccule. (mhmedical.com)
  • They contain the sensory hair cells and otoliths of the macula of utricle and of the saccule, respectively, which respond to linear acceleration and the force of gravity. (medscape.com)
  • Within the utricle and saccule, the sensory cells are arranged in a flat plate of cells called a macula. (cdc.gov)
  • The utricle and the saccule also possess a sensory end organ, the macula, which has neurosensory hair cells and otoliths. (basicmedicalkey.com)
  • The vestibular division supplies the macula in the utricle and in the saccule, as well as the crista ampullaris in the ampulla of each of the three semicircular ducts. (digitalhistology.org)
  • The receptor called the macula is a thickening in the wall of both the utricle and the saccule that responds to changes in linear acceleration and the force of gravity. (digitalhistology.org)
  • The cochlea, which houses the sensory organ for hearing, consists of a triangular-shaped, fluid-filled channel, the membranous labyrinth, that is housed within the bony labyrinth (otic capsule). (cdc.gov)
  • The membranous labyrinth spirals around a central bony canal, the modiolus, that contains the auditory division of the vestibulocochlear nerve (i.e., 8th cranial) and blood vessels to the cochlea. (cdc.gov)
  • The membranous labyrinth houses the cochlea and the vestibular apparatus, both of which are supplied by cranial nerve VIII. (basicmedicalkey.com)
  • Two special sensory systems receive their input from structures in the membranous labyrinth: the auditory system, from the cochlea (see Chapter 16 ), and the vestibular system, from the remainder of the labyrinth. (mhmedical.com)
  • Within the utricle and saccule, otoliths (small calcium carbonate crystals, also termed otoconia ) are located adjacent to hair cells clustered in macular regions. (mhmedical.com)
  • its anterior part leads, by an elliptical opening, into the scala vestibuli of the cochlea. (co.ma)
  • This opening is bounded inferiorly by a thin osseous plate, the lamina spiralis ossea, which springs from the floor of the vestibule immediately lateral to the recessus sphæricus, and forms, in the cochlea, the bony part of the septum between the scala tympani below and the scala vestibuli above. (co.ma)
  • The otoliths displace the hair cell processes and excite the utricle and saccule in response to horizontal and vertical acceleration. (mhmedical.com)
  • One end terminates in the spiral ligament, a process of the cochlea's central column, while the other is connected to the bony wall of the cochlea. (cloudaccess.net)
  • It is bounded internally by the lamina spiralis ossea, and externally by a second, smaller lamina, the lamina spiralis secundaria, which projects from the outer wall of the cochlea. (co.ma)
  • Its base corresponds with the area cochleæ on the fundus of the internal acoustic meatus, and exhibits the tractus spiralis foraminosus, which transmits the nerves for the basal and central coils of the cochlea and the foramen centrale, which gives passage to the nerves for the apical coil. (co.ma)
  • Ventral to the mid-level of the presumptive utricle, Otx1 and Otx2 were co-expressed, in regions such as the saccule and cochlea. (biologists.com)
  • Another study related to the knowledge of arteries anterior and posterior semicircular canals students about attitudes and practices for the to irrigate, utricle, saccule and part of the cochlea8. (bvsalud.org)
  • Paint-filled membranous labyrinths of Otx1 −/ − mutants showed an absence of the lateral semicircular canal, lateral ampulla, utriculosaccular duct and cochleosaccular duct, and a poorly defined hook (the proximal part) of the cochlea. (biologists.com)
  • The utricle communicates with the saccule through the utriculosaccular duct from which the endolymphatic duct arises. (lecturio.com)
  • Connected to the cochlea is the vestibular system, this organ senses where your head is in space, and is responsible for your feeling of equilibrium. (thevertigodoctor.com)
  • Hair follicles in the saccule and utricle add to the balance information by providing feedback about the position of the head in reference to gravity (vertical orientation) as well as detecting linear motion of the head. (revitalhealth.ca)
  • Both the cochlea and the vestibular system contain specialized sensory hair cells. (weilab.com)
  • the membrane's movements pushing the fluid in the Cochlea, and stimulating the hair cells at certain pitches of sound. (craniofacial.net)
  • The labyrinth or the inner ear contains two main structures including the cochlea and the vestibular system. (weilab.com)
  • The length of the tube is from 28 to 30 mm., and its diameter, near the base of the cochlea, 2 mm. (co.ma)
  • The cochlea is responsible for hearing and the vestibular system is responsible for motion and maintaining balance. (weilab.com)
  • The anterior portion is known as the cochlea and is the actual organ of hearing. (cloudaccess.net)
  • From the anterior part of the floor of the vestibule a narrow cleft, the fissura vestibuli, extends forwards into the bony canal of the cochlea. (co.ma)