Download Other examples of complex waves

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Endomembrane system wikipedia, lookup

Cell membrane wikipedia, lookup

Anatomical terminology wikipedia, lookup

Ear wikipedia, lookup

Transcript
Middle ear
Middle ear structures

Middle ear
cavity/tympanum

Tympanic
membrane

Ossicles/Middle
ear bones
Middle ear cavity

Approximately 2 cm3 in volume

Comprised of

Tympanic cavity between
outer and inner ear

Epitympanic recess above
the TM

Mastoid recess contained in
the mastoid region of the
temporal bone
Tympanic cavity

Similar to a box with six surfaces
1.
Lateral wall or membraneous
2.
Medial wall or labyrinthine wall:
3.
Anterior wall or carotid wall
4.
Posterior wall or mastoid wall
5.
Inferior wall or jugular wall
6.
Superior wall or tegmental wall
wall: Formed by TM
Promontory (outer wall of inner
ear)
Contains oval and round
windows
Tympanic membrane

Located in a bony groove

Held in place by fibers and cartilage

Cone shaped, translucent

55 to 90 mm2 in area
http://www.ghorayeb.com/AuricleEACAnatomy2.html
Tympanic membrane, cont’d.

Composed of two sets of
fibers:
1.
Radiates outward from
center
2.
Rings of fibers

Two regions in tympanic
membrane:

Superior region: Pars
flaccida

Inferior region: Pars tensa
Tympanic membrane, cont’d.

Umbo: Region of maximum concavity

Tympanic membrane attached to ossicles.
http://hyperphysics.phy-astr.gsu.edu/hbase/sound/ear.html
Ossicles
1.
Malleus: Hammer
2.
Incus: Anvil
3.
Stapes: Stirrup

Head of malleus and body of incus located in the
epitympanic recess

http://oto.wustl.edu/bbears/ossicle.htm
http://www.ghorayeb.com/StapesPics.html
http://audilab.bmed.mcgill.ca/~daren/3Dear/mid1.html
Malleus

Head

Anterior and posterior
processes

Handle or Manubrium
Incus

Body

Short crus/process

Long crus/process
(Plural of crus: Crura)
Stapes

Head or capitulum

Two bony crura

Flat oval bone
called footplate