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۱ ‏رت واه رزوی زواکت واااعز‎ the external acoustic ‏تخل تزور‎ Ceruminous glands; -ear wax or cerumen Arteries; Sola Nee le -deep auricular -ant. Auricular ‏روت‎ ‎-auriculotemporal -auricular branch of the ‏5ناوة/ا‎ 

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Tympanic cavity or middle ear (tympanic cavity proper & epitympanic reces) tympanic cavity proper; -vertical & anteroposterior D. 150 ع 6010 عناوتاة .0 ع5اع لاكمة 1 یی یتک تیاس ببرواعط The cavity is bounded; -laterally; tympanic membrane -medially; lat. Wall internal ear ۳ ‏یت مر ری اور وت تنیز‎ Lea) ۷۵ ۱۱۵5۲۵10 ۵۱۳ ‏کااع‎ -anteriorly; pharyngotympanic tube - Roof; tegmen tympani -floor; separated fom sup. Bulb of the int. jugular vein 

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تاه ام ات داد هگا ۱۳۵4۵ 9-9 tant inre arti 0 0 et en ormurtegt cer) ‏ع ناعم أطوم مي‎ 0 alee ل 00 علعه أمفم متنا 0 0 Mela ۱ ica Malle) floor 0 ۱ erere-ueletligetetenye) = -ant. & post. Malleolar folds 00 ieticiasly ۳ Pathway of Sound Reception ۳ عبا۲0۵۱۱6 ۵۲ ۳20016 0لا 

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Relations of the tympanic ‏اننا‎ -sup: auditory ossicles -ant. Inf.: conus light -post. Inf.: promontory Histologically has three strata; -cuticular, fibrous & mucous ‏توت و‎ -deep auricular ‏3ه الإك-‎ -ant. Tympanic Nerves; ‏ل‎ Led e-1) -auricular branch of vagus 

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Medial wall; 0 ‏أمهم مالا كناماك-‎ ‏05م 3اأنامممة-‎ Semicircular canal See Moet (ovalis) ۳ -annular ligament ‏وعااعم هندع مع)-‎ (rotunda) ۱ ‏عأفومصوين‎ ‎membrane (three layer) ۳ )2621 ۱6۳/۵ ‏ای‎ ‎Becta ea eal Plas lauryl Levator vel plat muscle SPrmontory with tympanic Uacobson and plexes Fossa of round (cochlear window jugular fos eral carci artery Facial nerve (V1 امه مسومو 9 0 

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Post. Wall; یت ایرث تا ‎-mastoid antrum‏ -0۷۲۵۲۵ ۱۵۱ ۵۵ 5أ0ناءمأ ه055- Mastoid Antrum ۵01 ۷۷۵۱۱۶ 301605 ‎Wall; post. Semicircular‏ رم اروت ‎-post. Wall; sigmoid sinus -roof; tegmen Ley ec Lali ‎-floor; several opening foe ‏از‎ ‎-ant.-inf.; facial nerve canal -lat. Wall; suprameatal triangle ‎ 

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:القللا امم ی ‎-osseous part of the‏ ‎pharyngotympanic tube‏ ‎Poa‏ ‏12000 30م كنامعدوه- مم24 كناهمزوة انارق 0 6- ‎Beat‏ ‎-tubal tonsil‏ ‎Secu‏ ‎aint cl‏ ۱۳ امع ومتمعدم 0016م ‎Spm)‏ ‏أقمقء ‏00 ‏بع كناماء ام امهم دمي - ‎pterygopalatine ganglion‏ 

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Auditory ossicles (malleus, incus & stapes) = Hammer or Malleus: = Head, Neck, Handle, Ant. Process & Post. Process = Saddle joint with incus - = Neck related with chorda tympanic nerve ‘Auditory ossicles Head Short limb, /AnticularMalleus Anterior surface process for malleus Body 1 on iio Lenticular Lateral Base pre Process Incus: testes lateral view limb: “Anterior ; Je Stapes Malleus: He ۷ 4 ‏بال ل‎ lateral view Stapes: superolateral view Ossicles articulated: medi 

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Incus; -body -saddle joint with malleus -long process -lenticular process -short process -fossa incudis 

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Stapes; Head, neck, limbs & base ‏لقعم‎ -joint with lenticular process Neck; -attached by tendon stapedius ‏ریا كا‎ -ant. Limb is shorter & ‏لع لثاناء 55و16‎ Foot plate or Base; -attached to margin ‏عاناطتأدوعنا هأوعمع1]‎ 

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Ligaments of the auditory ossicles = Ant. Lig. Of the malleus; = -from mallear neck to ant. Wall tympanic cavity near petrotympanic ‏توااتتزرا‎ = Lat. Lig of the malleus; = -from 0 notch to head of malleus = Post. Lig. Of the incus; = -from short process to fossa incudis = Sup. Lig. Of the incus; = -from body incus to roof = Annular lig. Of the base of stapes 

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Muscles of the tympanic cavity 

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۱۷ ‏واع‌ووه‎ ‎-ant. Tympanic -stylomastoid -petrosal -sup. Tympanic -ascending pharyngeal -artery of the petrygoid canal -tympanic branch Plexus tympanic; -tympanic branch of glossopharyngeal -caroticotympanic nerve of sympathetic 

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(osseus & Membrane eeyaaisiea} ramens Ween mes ticle Umer ICES 2 Vestibule; ovoid, L=5mm, T=3mm Siecle ‏اي ل‎ U LT -medial wall; [۳ eteee Beco] -macula cribrosa media -area vestibularis inf. -vestibular crest Byer Meta etal) ‏ا‎ ‏امءتامزااع-‎ ۲6655 و۰ ۰اه 5ز۲هاباطناکه۷ ۳۵۵ج- و" عن عتأقطممم يزاه لمع ‎Ant. Wall;‏ Bee Roel :اا۷۷۵ 50۰ اعوع ‎-five orifices of the semicircular canals‏ 

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Semicircular canals (ant. Or sup. post. & lat. Or horizontal) = They lie posterosuperior to the vestibule = Two-thirds of a circle = 0.8mm diameter = Ampulla & nonampulla = Crus commune 

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Ant. (sup.) semicircular canal; ۰۳ ‏رويك‎ -vertical to long axis of the ‏5نام6اعم‎ 0051 حاتأأللا 10ن 10 تلامء 005 - ‎Semicircular‏ Post. Semicircular canal; -L=18-22mm -parallel to long axis of the petrous 98 ‏همان دابت‎ ۴ -foramen singulare Lat. Semicircular canal; -L=12-15mm, horizontally 

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Conical snail-shell 0 eae] or cupula ree eae ag cE TS mele ‏ل ل‎ ‏ع أنأدنامع2‎ 7635 00 ‏عفرح‎ ‎-Spiral canal is two & three- 0103866 ‏غ1 كنا‎ 0 ‏ل‎ ce dividing the canal Three longitudinal canal; -middle (cochlear duct), blind 0 01 cul -Helicotrema 

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Modiolus; -tractus spiralis foraminous -near int. acoustic meatus -spiral canal -central foramina -Canalis longitudinal modioli 

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= Osseous spiral canal; mene) ence aS promontory = -.=35mm from base to cupula -three opening; -fenestra cochlea -fenestra vestibuli -cochlear 69091 ‏کباانت‎ 

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Osseous spiral lamina; -projecting from odiolus -halfway across the cochlear canal and complate by lamina basilaris -scala vestibuli -scala tempani -helicotrema ‏ورزر‎ ‎secondary spiral lamina 

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Internal acoustic meatus ۳ 00 Btls ie a oar) ۱۱۳ ۳ میاه عزءدابطناعع۷ 2۲62 , تاووم- 0 5نام 800 کهانا ۲و5 eared عیاعهوزط۵:۵) وااه۲امه عننا ۲۲۵ راوج ‎ae‏ 1۳ هزعم ووهءطلى دانا ۳۵ ,دهم ۳ ۳ ۲۵ 6د انا و زو ‎ei‏ ۳ و و موه 

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Membranous labyrint (utricle, saccule, three semicircular duct & cochlear duct) = Utricle; = -larger vestibular sacs = -utricular macula = -ductus utriculosaccular |) endolymphaticus = -Aqueduct vestibuli = -ductus reuniens or ‏ةا‎ 0 = -macula of the saccule 

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Semicircular ductus; weer mesa rer t -sepum transersum pra Ulcers Structure of utricle, saccule & 56100۲ ‏:كاعنال ۲داب‎ -ext. layer, fibrous -0/۵016 ۱3۱/۵۴, ‏داب که۷‎ ۱ ‏أقأاء ط امع‎ Cochlear duct; ذاناومدء ذا أه مقوءه كقط عمق طممع ص عواتكة8- كناف عمةطصعمم زو ۱۶ أقعام5 .وذ! ته كأمقانءكنا هناك 

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Spiral organ of corti Rods or pillars of corti; -internal & external Hairs cells; -inner (single row) -outer (four row) -1161 0۲ 60 Supporting cells; -Deiters or phalengeal -Hensen supporting cells Reticular lamina; -from outer hair to Hensen Tectoria membrane 

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Vestibulocochlearis (vestibular & cochlear) = Vestibular nerve; = -Vestibular ganglion (of Scarpa) = -sup., inf. & post. Vestibular 801 = -Sup. Ramus; ‏ت۱۱‎ 3 -utricular macula, ampullaris ‏آ0 کع۲»‎ 20. 6 3. ‏کف كيتكت‎ ‏ریت رز‎ 106. ‏5لا 6ةاناطاأغدوعلا‎ -saccular maculare -post. Ramus; -ampullary crest of post. Semicircular duct 

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Cochlear nerve; Spiral ganglion; -in spiral canal modiolus تلو اك تلان تحاعغمأء لاط قا -labyrinthine from basilar or ant. Inf. ‏وتات( و۱92‎ -stylomastoid 

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