Middle Ear Cavity aka Tympanic Cavity

Bismillahirrahmaanirrahiim

FIG. 910– The tympanic membrane viewed from within. (Testut.) The malleus has been resected immediately beyond its lateral process, in order to show the tympanomalleolar folds and the membrana flaccida.

1. Tympanic membrane.
2. Umbo.
3. Handle of the malleus.
4. Lateral process.
5. Anterior tympanomalleolar fold.
6. Posterior tympanomalleolar fold.
7. Pars flaccida. 8. Anterior pouch of Tröltsch.
9. Posterior pouch of Tröltsch.
10. Fibrocartilaginous ring.
11. Petrotympanic fissure.
12. Auditory tube.
13. Iter chordæ posterius.
14. Iter chordæ anterius.
15. Fossa incudis for short crus of the incus.
16. Prominentia styloidea.

p/s: emmm, saya pun tak pasti apa yang saya jumpa, tapi saya nak save link animations nie.. :D


http://www.getbodysmart.com/ap/respiratorysystem/pharynx/auditorytubes/tutorial.html
http://www.slideshare.net/bholmes/chapt12-holes-lecture-animation1
http://www.slideshare.net/bholmes/ch12-ppt-lect
http://bcs.whfreeman.com/thelifewire/content/chp45/4502001.html
http://www.oucom.ohiou.edu/dbms-witmer/Downloads/2008_Witmer_and_Ridgely_Pachyrhinosaurus_brain-ear.pdf


http://kuwaitmd.hsc.edu.kw/main/files/flash/pouch.swf




yg kat bawah nie amik kat sini.. credit to kak zahidah :) syukran!
http://home.comcast.net/~wnor/lesson3.htm

The Ear

Dissection of the ear is difficult in the lab and usually takes too much time in most anatomy courses, but, you should have some understanding of what makes up the ear.

The ear is usually broken up into three parts: External ear auricle external auditory meatus Middle ear (or tympanum, tympanic cavity) tympanic membrane tympanic cavity & antrum pharyngotympanic tube (or auditory tube, or Eustachian tube) Internal (inner) ear osseous labyrinth membranous labrynth

External Ear concha crus helix helix scaphoid fossa antihelix antitragus tragus lobule not labeled

Middle earThe diagram shows a cut through the external, middle and inner ears. The middle ear cavity is like a small box with lateral, medial, anterior and posterior walls, a floor and a roof. This box is located inside the temporal bone. Items to identify are: mec-middle ear cavity ptb-temporal bone, eam-external auditory meatus, ec-ear cartilage, tm-tympanic membrane. Medial wall promontory with its tympanic plexus of nerves Lateral wall tympanic membrane (tm) Anterior wall pharyngotympanic tube (at) sulcus for internal carotid artery Posterior wall opening into mastoid air cells Roof tegmen tympani of petrous temporal bone ptb Floor sulcus for internal jugular vein (not shown)

Contents of the middle ear cavity: malleus (m) incus (i) stapes (s)

Internal EarThe internal or inner ear is made up of an osseous part (ol) which encloses a membranous part (ml), in blue on the image. The membranous part includes the vestibule and semicircular canals for equilibrium and the cochlea for sound.

If visualizing the middle ear cavity in three dimensions is difficult, print out the following image and make the proper folds. The associated structures are listed and numbered.

Middle ear cavity canal for tensor tympani muscle auditory tube internal carotid artery facial nerve geniculate ganglion greater petrosal nerve lesser petrosal nerve promontory formed by 1st turn of cochlea tympanic plexus round window lateral semicircular canal facial canal and facial nerve oval window for stapes tympanic nerve from IX jugular vein opening to mastoid air cells (aditus ad antrum) tendon of stapedius muscle malleus tympanic membrane chorda tympani stylomastoid foramen

List of items to identify in this lesson

Bones of orbitfrontal zygomatic greater wing of sphenoid maxillary lacrimal ethmoid (orbital plate) palatine lesser wing of sphenoid Foramina of orbit optic foramen anterior ethmoidal foramen posterior ethmoidal foramen superior orbital fissure inferior orbital fissure zygomatic foramen Contents of orbit optic nerve eyeball ophthalmic artery central artery of retina superior ophthalmic vein ophthalmic division of V frontal supraorbital supratrochlear lacrimal nasociliary anterior ethmoidal posterior ethmoidal (very small) infratrochlear trochlear nerve abducens nerve oculomotor upper division lower division ciliary ganglion

Floor of orbitinfraorbital nerve zygomatic nerve Muscles levator palpebrae superioris superior rectus superior oblique medial rectus lateral rectus inferior rectus inferior oblique External Ear concha crus helix helix scaphoid fossa antihelix antitragus tragus lobule not labeled Middle ear malleus incus stapes

1st time wat nota copy n paste :P
ntah, tensen sangat kot tegok 'ruang' yg sempit


*jadi menyampah bila apa yang kita cari tak jumpa.. pheww*
fasobrun jameel :)