Histology Of The Ear Chiaia Anatomy Block Ii Unit Iii

Front 1

Lining of tympanic membrane

Back 1

Simple squamous epithelium

Front 2

Lining of tympanic cavity

Back 2

siple squamous epithelium

Front 3

Lining of eustachian tube

Back 3

pseudostratified columnar ciliated epithelium

Front 4

Otitis media

Back 4

Middle aer infection

Front 5

Actions of ossicles

Back 5

Decrease amplitude but increase force

Front 6

Secondary tympanic window

Back 6

Covering of round window

Front 7

Spiral lamina

Back 7

Extending from modiolus a thin bony ridge

Front 8

Contents of modiolus

Back 8

Cell bodies and processes of spiral ganglion cells and acoustic branch of VIII cranial nerve (vestibulocochlear)

Front 9

Bony labryrinth filling

Back 9

Perilymph
High Na+ Low K+

Front 10

Membranous labryth filling

Back 10

Endolymph
High K+ Low Na+

Front 11

Lining of membranous labyrinth

Back 11

Simple squamous epithelium

Front 12

Helicotrema

Back 12

Where scala vestibuli and scala tympani communicate

Front 13

Walls of cochear duct

Back 13

Roof = Reissner's membrane (2 layers of simple squamous epithelium separated by a basement membrane)

Lateral wall= Stria vascularis (source of endolymph)

Floor = basilar membrane
(columnar epithelum)

Front 14

Anchoring of the organ of corti

Back 14

Spiral ligament at one end and osseous spiral lamina at the other

Front 15

Supporting cells of cochlea

Back 15

Pillar cells and phalangeal cells

Front 16

Inner vs. outer hair cells

Back 16

Inner hair cells
Stereocilia, innervation from CN 8
Very sensitive

Outer hair cells
Columnar shape cells
3 rows
Arranged in a W shape
Tips are embedded in tectorial membrane
Responds to low intensity sounds
Few neuronal connections

Front 17

Impedance matching

Back 17

Vibrations of the tympanic membrane forcing changes in leverage of ossicles

Front 18

Inner vs. outer hair cells

Back 18

Inner hair cells
Stereocilia, innervation from CN 8
Very sensitive

Outer hair cells
Columnar shape cells
3 rows
Arranged in a W shape
Tips are embedded in tectorial membrane
Responds to low intensity sounds
Few neuronal connections

Front 19

Impedance matching

Back 19

Vibrations of the tympanic membrane forcing changes in leverage of ossicles

Front 20

Structures involved in detection of motion

Back 20

Endolymph filled utricule and saccule, semicircular ducts

Front 21

Lining of semicircular ducts

Back 21

Simple squamous epithelium

Front 22

Cristae ampullaris

Back 22

Raised transvese ridge in the semicircular ducts

Composed of 3 types of cells
Tall columnar sustentacular cells
Type I: Flask shaped cells with apical stereocilia similar to the inner hair cells of the basilar membrane (flanked by non-motile kinocilium)

Type II:
Cylindrical cells with apical stereocilia similar to outer hair cells of the basilar membrane, also possess kinocilia)

Front 23

Origin of sensory hair cell contacts

Back 23

Vestibular (Scarpa's) ganglion located at base of modialus

Front 24

Type I vs. Type II cell endings

Back 24

Type I = Funnel (chalice) shaped endings
Type II = Bouton-like endings

Front 25

Cupola

Back 25

Glycoprotein material that extends from the walls of the ampullae in the semicircular ducts.

Front 26

Inner vs. outer hair cells

Back 26

Inner hair cells
Stereocilia, innervation from CN 8
Very sensitive

Outer hair cells
Columnar shape cells
3 rows
Arranged in a W shape
Tips are embedded in tectorial membrane
Responds to low intensity sounds
Few neuronal connections

Front 27

Macula

Back 27

Patch of sensory epithelium in the utricle and saccule that is responsible for the detection of head position and linear acceleartion.

Macula of saccule in vertical plane
Macula of utrical in horizontal plane

Front 28

Impedance matching

Back 28

Vibrations of the tympanic membrane forcing changes in leverage of ossicles

Front 29

Structures involved in detection of motion

Back 29

Endolymph filled utricule and saccule, semicircular ducts

Front 30

Cell types in utricle and saccule

Back 30

Columnar supporting cells, sensory hair cells

Front 31

Otolithic membrane

Back 31

Membrane covering the apical surface of sensory hair cells in saccule and utricle.

Front 32

Lining of semicircular ducts

Back 32

Simple squamous epithelium

Front 33

Cristae ampullaris

Back 33

Raised transvese ridge in the semicircular ducts

Composed of 3 types of cells
Tall columnar sustentacular cells
Type I: Flask shaped cells with apical stereocilia similar to the inner hair cells of the basilar membrane (flanked by non-motile kinocilium)

Type II:
Cylindrical cells with apical stereocilia similar to outer hair cells of the basilar membrane, also possess kinocilia)

Front 34

Otoliths

Back 34

Calcium carbonate crysals in otolithic membrane

Front 35

Origin of sensory hair cell contacts

Back 35

Vestibular (Scarpa's) ganglion located at base of modialus

Front 36

Type I vs. Type II cell endings

Back 36

Type I = Funnel (chalice) shaped endings
Type II = Bouton-like endings

Front 37

Cupola

Back 37

Glycoprotein material that extends from the walls of the ampullae in the semicircular ducts.

Front 38

Macula

Back 38

Patch of sensory epithelium in the utricle and saccule that is responsible for the detection of head position and linear acceleartion.

Macula of saccule in vertical plane
Macula of utrical in horizontal plane

Front 39

Cell types in utricle and saccule

Back 39

Columnar supporting cells, sensory hair cells

Front 40

Otolithic membrane

Back 40

Membrane covering the apical surface of sensory hair cells in saccule and utricle.

Front 41

Otoliths

Back 41

Calcium carbonate crysals in otolithic membrane