logging in or signing up inner ear anatomy ppt. Dr Javed shah FRCS ,Bannu Medical College jisent Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 1222 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: September 27, 2011 This Presentation is Public Favorites: 1 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Anatomy of inner Ear: Anatomy of inner Ear Inner Ear Lies in Petrous part of temporal bone. Inner Ear consist of two Parts 1/ Bony (Osseous ) Labyrinth. 2/ Membranous LabyrinthSlide 2: Embryology: Thickening of ectoderm. Pit and vesicle formation,sinks deep to mesenchyma. Pit and then vesicle, sinks to deep mesenchyma Embryology: Thickening of ectoderm.Slide 3: The vesicle forms Membranous Labyrinth The surrounding Mesenchyma forms the Bony Labyrinth, Hardest bone. Perilymphatic spaceSlide 4: Perilymph Bony(osseous labyrinth): Bony(osseous labyrinth) Vestibule: central area between lateral termination of IAM and tympanic cavity. Size: ASpirin tablet. Communicates anteriorly with scala vestibule And posteriorly with 5 openings of SCC>Slide 6: Medial wall of vestibule: 8th nerve Lateral wall, oval window and round window.Slide 8: Medial wall of vestibule. perforations for 8th nerve. The front half of medial wall has Saccule of membranous labyrinth the posterior half contains Utricle orifice of aqueduct of vestibule.Slide 10: The Semicircular Canals: Posterior end of bony Labyrinth. 3 SCC, Lateral, Posterior and Superior, 2/3 of a circleSlide 11: Each canal has 2 opening to vestibule one opening of each canal is dilated called Ampulary end Non ampulary ends of Posterior and superior canal make common opening. total 5 openings to vestibule Cochlea: Cochlea Anterior part of bony labyrinth Hollow tube taking 2and3/4 turn round Modiolus. where the tube is applied to modiolus ,crest of bone like flange of screw projects to lumen dividing almost to 2 tube, HelicotremaSlide 13: Modiolus abuts on the cholera area of IAM Cochlear nerve enters in the centre and periphery. distance from base to apex is 5 mm. length of cochlear duct is 30 mm.Slide 14: Scala vestibule scala tympani Membranous Labyrinth: Membranous Labyrinth Otic vesicle. 2 out growths Anterior forms cholera duct(scala media)and endolymphatic duct and sac Posterior part forms sacule,utricle and 3 scc .Slide 16: Semicircular canals. superior and lateral have 3 openings, crus commune and 2 ampulary ends,lat scc have 2 openings to utricle . total 5 opening to utricle.Slide 17: Cochlear duct . starts at saccule by canalis reunion. Basilar membrane,attaches to spiral lamina aand lateral wall of bony cochlea.and divide the chclear duct to scala vestibule and tympaniSlide 18: basilar membrane epithelium show modification ,organ of corti Scala media triangular on sectionSlide 20: Sensory areas in membranous ssc and cochlea. 1/ Crista ampullaris of ssc 2/Macula in utricle and saccule. 3/organ of cortiSlide 21: Blood supply of internal Ear. internal auditory artery, branch of anterior cerbellar artery, cochlear and vestibular branches veins of same name drain to petrosal sinusSlide 22: Vestibular cochlear nerve. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.