Anatomy of inner ear hk

ByDR MITHUN SUTRAVE PG IN ENT ,MRMC, GULBARGA

MODERATOR:DR C B NANDYAL,

PROF ENT,MRMC GULBARGA

OVERVIEW•EMBRYOLOGY• ANATOMYBONY LABYRINTH MEMBRANOUS LABYRINTH- GROSS ANATOMY OF COCHLEA

- MICROSCOPIC ANATOMY OF COCHLEA – ORGAN OF CORTI

- GROSS ANATOMY OF VESTIBULAR SYSTEM- MICROSCOPIC ANATOMY OF VESTIBULAR ENDORGANS

•INNER EAR FLUIDS•BLOOD SUPPLY•NERVE SUPPLY•SURGICAL APPROACH TO INNER EAR

OVERVIEW

•EMBRYOLOGY•ANATOMYBONY LABYRINTH MEMBRANOUS LABYRINTH- GROSS ANATOMY OF COCHLEA

- MICROSCOPIC ANATOMY OF COCHLEA – ORGAN OF CORTI

- GROSS ANATOMY OF VESTIBULAR SYSTEM- MICROSCOPIC ANATOMY OF VESTIBULAR ENDORGANS

•INNER EAR FLUIDS•BLOOD SUPPLY•NERVE SUPPLY•SURGICAL APPROACH TO INNER EAR

Involves three main phases:

1)Development(4th to 8th week)

2)Growth (8th to 16th week)

3)Ossification (16th to 24th week)

4

Embryology

OTIC PLACODES

OTIC PIT

OTOCYST

OTOCYST

VENTRAL SACCULAR PORTION

DORSAL URICULAR PORTION

SACCULE & COCHLEAR DUCT

UTRICLE , SCC & ENDOLYMPHATIC

DUCT

MEMBRANOUS LABYRINTH

DEVELOPMENT OF SACCULE COCHLEA & ORGAN OF CORTI

DEVELOPMENT OF SACCULE COCHLEA & ORGAN OF CORTI

DEVELOPMENT OF SCC AND VESTIBULAR END ORGANS

APPLIED

GENETIC

MICHELS

MONDINI

BING SEIBENMANN

SCHEIBE

USHERS

WAARDENBURG’S

ALPORTS

CHROMOSOMAL TRISOMY 13 AND 18

ACQUIRED

TERATOGENS EXRETINOIC ACID THALODOMIDE

PRENATAL INF RUBELLA CMV TOXOPLASMOSIS

SCHEIBE

MONDINI

USHER

ALPORT

WARDENBURG

OVERVIEW•EMBRYOLOGY

•ANATOMYBONY LABYRINTHMEMBRANOUS LABYRINTH- GROSS ANATOMY OF COCHLEA

- MICROSCOPIC ANATOMY OF COCHLEA – ORGAN OF CORTI

- GROSS ANATOMY OF VESTIBULAR SYSTEM- MICROSCOPIC ANATOMY OF VESTIBULAR ENDORGANS

•INNER EAR FLUIDS•BLOOD SUPPLY•NERVE SUPPLY•SURGICAL APPROACH TO INNER EAR

labyrinth - irregular network of passages in which it is difficult to find one's way.

ANATOMY OF INNER EAR

OVERVIEW•EMBRYOLOGY• ANATOMY

BONY LABYRINTH MEMBRANOUS LABYRINTH- GROSS ANATOMY OF COCHLEA

- MICROSCOPIC ANATOMY OF COCHLEA – ORGAN OF CORTI

- GROSS ANATOMY OF VESTIBULAR SYSTEM- MICROSCOPIC ANATOMY OF VESTIBULAR ENDORGANS

•INNER EAR FLUIDS•BLOOD SUPPLY•NERVE SUPPLY•SURGICAL APPROACH TO INNER EAR

BONY LABYTINTH

Bony labyrinth

vestibule

Bony labyrinthSCC

Bony labyrinthSCC Orientation of semicircular canals in head

Bony labyrinthCOCHLEA

Bony labyrinthCOCHLEA

Bony labyrinthCOCHLEA COCHLEAR IMPLANT

OVERVIEW•INTRODUCTION: HISTORICAL PERSPECTIVE•EMBRYOLOGY• ANATOMYBONY LABYRINTH

MEMBRANOUS LABYRINTH- GROSS ANATOMY OF COCHLEA

- MICROSCOPIC ANATOMY OF COCHLEA – ORGAN OF CORTI

- GROSS ANATOMY OF VESTIBULAR SYSTEM- MICROSCOPIC ANATOMY OF VESTIBULAR ENDORGANS

•INNER EAR FLUIDS•BLOOD SUPPLY•NERVE SUPPLY•SURGICAL APPROACH TO INNER EAR

MEMBRANOUS LABYRINTH

MEMBRANOUS LABYRINTH COCHLEAR DUCT

MEMBRANOUS LABYRINTHCOCHLEAR DUCT

MEMBRANOUS LABYRINTH COCHLEAR DUCT

OVERVIEW•EMBRYOLOGY• ANATOMYBONY LABYRINTH MEMBRANOUS LABYRINTH- GROSS ANATOMY OF COCHLEA

- MICROSCOPIC ANATOMY OF COCHLEA – ORGAN OF CORTI

- GROSS ANATOMY OF VESTIBULAR SYSTEM- MICROSCOPIC ANATOMY OF VESTIBULAR ENDORGANS

•INNER EAR FLUIDS•BLOOD SUPPLY•NERVE SUPPLY•SURGICAL APPROACH TO INNER EAR

ORGAN OF CORTI

ORGAN OF CORTIORGAN OF CORTI

INNER AND OUTER HAIR CELLS

ORGAN OF CORTIDEITER CELLS

ORGAN OF CORTI

HENSEN, CLAUDIUS AND BOETTCHER CELLS

ORGAN OF CORTI

TECTORIAL MEMBRANE

OVERVIEW•EMBRYOLOGY• ANATOMYBONY LABYRINTH MEMBRANOUS LABYRINTH- GROSS ANATOMY OF COCHLEA

- MICROSCOPIC ANATOMY OF COCHLEA – ORGAN OF CORTI

- ANATOMY OF VESTIBULAR SYSTEM

•INNER EAR FLUIDS•BLOOD SUPPLY•NERVE SUPPLY•SURGICAL APPROACH TO INNER EAR

MEMBRANOUS LABYRINTH

&

MEMBRANOUS LABYRINTH UTRICLE SACCULE

&

MEMBRANOUS LABYRINTH

UTRICLE SACCULE

&

MEMBRANOUS LABYRINTH UTRICLE SACCULE

MEMBRANOUS LABYRINTH SACCULE APPLIED ANATOMY

MEMBRANOUS LABYRINTH ENDOLYMPHATIC DUCT AND SAC

MEMBRANOUS LABYRINTH ENDOLYMPHATIC SAC DECOMPRESSION

DONALDSON LINE

ANATOMY OF VESTIBULAR END ORGANS

ANATOMY OF VESTIBULAR END ORGANS CRISTAE

SUPPORTING CELLS

BPPVANATOMY OF VESTIBULAR END

ORGANS

MENIERE’SANATOMY OF VESTIBULAR END

ORGANS

OVERVIEW•EMBRYOLOGY• ANATOMYBONY LABYRINTH MEMBRANOUS LABYRINTH- GROSS ANATOMY OF COCHLEA

- MICROSCOPIC ANATOMY OF COCHLEA – ORGAN OF CORTI

- GROSS ANATOMY OF VESTIBULAR SYSTEM- MICROSCOPIC ANATOMY OF VESTIBULAR ENDORGANS

•INNER EAR FLUIDS•BLOOD SUPPLY•NERVE SUPPLY•SURGICAL APPROACH TO INNER EAR

INNER EAR FLUIDS

HIGH NaLOW K

LOW NaHIGH K

INNER EAR FLUID

OVERVIEW•INTRODUCTION: HISTORICAL PERSPECTIVE•EMBRYOLOGY• ANATOMYBONY LABYRINTH MEMBRANOUS LABYRINTH- GROSS ANATOMY OF COCHLEA

- MICROSCOPIC ANATOMY OF COCHLEA – ORGAN OF CORTI

- GROSS ANATOMY OF VESTIBULAR SYSTEM- MICROSCOPIC ANATOMY OF VESTIBULAR ENDORGANS

•INNER EAR FLUIDS

•BLOOD SUPPLY•NERVE SUPPLY•SURGICAL APPROACH TO INNER EAR

BLOOD SUPPLY

OVERVIEW•INTRODUCTION: HISTORICAL PERSPECTIVE•EMBRYOLOGY• ANATOMYBONY LABYRINTH MEMBRANOUS LABYRINTH- GROSS ANATOMY OF COCHLEA

- MICROSCOPIC ANATOMY OF COCHLEA – ORGAN OF CORTI

- GROSS ANATOMY OF VESTIBULAR SYSTEM- MICROSCOPIC ANATOMY OF VESTIBULAR ENDORGANS

•INNER EAR FLUIDS•BLOOD SUPPLY

•NERVE SUPPLY•SURGICAL APPROACH TO INNER EAR

NERVE SUPPLY OF INNER EAR

VESTIBULOCOCHLEAR NERVE

NERVE SUPPLY OF INNER EAR

Cochlear nerve

• TRANSCANAL APPROACH

• TRANSLABYRINTHINE

SURGICAL APPROACH TO INNER EAR

SURGICAL APPROACH TO INNER EARTRANS LABYRINTHINE APPROACH