The Ear

The Ear
External ear centre of attention ear Internal ear
By Dr Ahmad Dalbah

External Ear
The external ear has an auricle and an external auditive meatus. The auricle ( penna) : collects air vibrations.

External Ear
The external auditory meatus is a curved tube. The framework of the outer third of the meatus is elastic cartilage, and the intimate two thirds is bone, formed by the tympanic plate of the lay bone 2-3 cm





AUDITORY MEATUS cerumen (wax) is produced in the outer 2/3 and is a bactericidal which aids in the cleanup mechanism along with epithelial migration



The hairs and the wax provide a sticky barrier that prevents the entrance of foreign bodies

External Ear
The afferent typeface supply from the auriculotemporal nerve and the great auricle nerve ( to posterior find). The lymph drainage is to the superficial parotid, mastoid, and superficial cervical lymph nodes.

 center of attention Ear
The tympanic membrane is a thin, semitransparent, fibrous membrane that is helicopter gray. The membrane is obliquely placed, facing downward, forward, and laterally. It is concave laterally, small depression, the umbo, produced by the tip of the handle of the malleus. The tympanic membrane is about 1 cm in diameter.





Middle Ear, tympanic membrane
The tympanic membrane is extremely sensitive to pain and is innervated on its outer step forward by the auriculotemporal nerve and the auricular branch The internal surface of the tympanic membrane is supplied by the glossopharyngeal nerve (CN IX).



tympanic Membrane Examination
BY Otoscopic

Otitis media

Perforation of tympanic membrane

Middle ear
The cavity of the center ear is the narrow air-filled chamber in the petrous part of the temporal bone. The tympanic cavity is lined with mucous membrane that is continuous with the lining of the pharyngotympanic tube, mastoid cells, and mastoid antrum.

Middle ear
The contents of the middle ear are the: ...If you want to place a full essay, order it on our website: Orderessay



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