Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/41

Click to flip

41 Cards in this Set

  • Front
  • Back
Lining of tympanic membrane
Simple squamous epithelium
Lining of tympanic cavity
siple squamous epithelium
Lining of eustachian tube
pseudostratified columnar ciliated epithelium
Otitis media
Middle aer infection
Actions of ossicles
Decrease amplitude but increase force
Secondary tympanic window
Covering of round window
Spiral lamina
Extending from modiolus a thin bony ridge
Contents of modiolus
Cell bodies and processes of spiral ganglion cells and acoustic branch of VIII cranial nerve (vestibulocochlear)
Bony labryrinth filling
Perilymph
High Na+ Low K+
Membranous labryth filling
Endolymph
High K+ Low Na+
Lining of membranous labyrinth
Simple squamous epithelium
Helicotrema
Where scala vestibuli and scala tympani communicate
Walls of cochear duct
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)
Anchoring of the organ of corti
Spiral ligament at one end and osseous spiral lamina at the other
Supporting cells of cochlea
Pillar cells and phalangeal cells
Inner vs. outer hair cells
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
Impedance matching
Vibrations of the tympanic membrane forcing changes in leverage of ossicles
Inner vs. outer hair cells
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
Impedance matching
Vibrations of the tympanic membrane forcing changes in leverage of ossicles
Structures involved in detection of motion
Endolymph filled utricule and saccule, semicircular ducts
Lining of semicircular ducts
Simple squamous epithelium
Cristae ampullaris
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)
Origin of sensory hair cell contacts
Vestibular (Scarpa's) ganglion located at base of modialus
Type I vs. Type II cell endings
Type I = Funnel (chalice) shaped endings
Type II = Bouton-like endings
Cupola
Glycoprotein material that extends from the walls of the ampullae in the semicircular ducts.
Inner vs. outer hair cells
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
Macula
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
Impedance matching
Vibrations of the tympanic membrane forcing changes in leverage of ossicles
Structures involved in detection of motion
Endolymph filled utricule and saccule, semicircular ducts
Cell types in utricle and saccule
Columnar supporting cells, sensory hair cells
Otolithic membrane
Membrane covering the apical surface of sensory hair cells in saccule and utricle.
Lining of semicircular ducts
Simple squamous epithelium
Cristae ampullaris
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)
Otoliths
Calcium carbonate crysals in otolithic membrane
Origin of sensory hair cell contacts
Vestibular (Scarpa's) ganglion located at base of modialus
Type I vs. Type II cell endings
Type I = Funnel (chalice) shaped endings
Type II = Bouton-like endings
Cupola
Glycoprotein material that extends from the walls of the ampullae in the semicircular ducts.
Macula
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
Cell types in utricle and saccule
Columnar supporting cells, sensory hair cells
Otolithic membrane
Membrane covering the apical surface of sensory hair cells in saccule and utricle.
Otoliths
Calcium carbonate crysals in otolithic membrane