Microtia accessory auricle Microtia Bat ear Accessory auricle Accessory auricle micro
Microtia & accessory auricle Microtia & accessory auricle Mi ti cro a B t a ear 6 Accessory auricle Accessory auricle & microtia
/ Different microtia
7 Different microtia
External acoustic meatus 92.5cm length, S-shaped curvature Between ext acoustic pore and tympanic membrane Beneath the skin lie the wax secreting ceruminous gland OParts: outer1/3 cartilaginous part, inner 2/3 osseous part While to examine or check tympanic membrane In adult: pull the auricle posteriorly superiorly In children: pull the auricle posteriorly inferiorly Ceruminal impaction Much cerumen block the external auditory meatus and affect the conduction of sound wave
External acoustic meatus 2.5cm length, S-shaped curvature Between ext.acoustic pore and tympanic membrane Between ext.acoustic pore and tympanic membrane Beneath the skin lie the wax secreting ceruminous gland Parts:outer1/3 cartilaginous part,inner 2/3 osseous part While to examine or check tympanic membrane In adult: pull the auricle posteriorly & superiorly In children In children:pull the auricle posteriorly & inferiorly :pull the auricle posteriorly & inferiorly Ceruminal impaction Ceruminal impaction Much cerumen block the external auditory meatus and affect the conduction of sound wave. 8
Bony semicircular canal cochlea Vestibulocochlear n Tensortympa Bony part of extemal acoustic meatus Internal carotid a Cartilaginous part of ernal acoustic meatus 3:圈 Auditory The vestibulocochlera organ
The vestibulocochlera organ 9
Tympanic membrane(Eardrum) Head of Perforation of Posterior malleolar fold Flaccid tympanic membrane Malleolar malleolar fold Malleolar stria Umbo of tympanic Tense part Cone c
Tympanic membrane (Eardrum) Tympanic membrane (Eardrum) Perforation of tympanic membrane tympanic membrane 10