anatomy of middle ear cleft microteaching, 06.03.17, dr.pk
TRANSCRIPT
Dr.P.KARTHIKEYAN, D.L.O.,DNB(ENT),PROFESSOR AND HEAD OF ENT,
MGMCRI, PONDICHERRY.
MIDDLE EAR CLEFT
PARTS OF TYMPANIC MEMBRANE
CONTENTS OF MIDDLE EAR
SURGICAL IMPORTANCE
Layers of TM: outer epithelial layer middle fibrous layer inner mucosal layer Nerve supply: Branches of auriculotemporal nerve. Auricular branch of vagus. Tympanic branch of glossopharyngeal
nerve.
Irregular air filled space within temporal bone between TM laterally and osseous labyrinth medially.
Contains- 3 ossicles 2 muscles chorda tympani tympanic plexus
Anterio inferiorly – Ciliated columnar epithelium with lot of goblet cells and mucous glands.
Postero superiorly – Cuboidal epithelium with less glands.
Epitympanum – Pavement or flat epithelium.
DRAW THE DIAGRAM OF TM AND NAME ITS PARTS.
MEDIAL WALL OF MIDDLE EAR.
CONTENTS OF MIDDLE EAR
CSOM - SIGNIFICANCE