16100998
Description
Mind Map by heba magdi, updated more than 1 year ago
|
Created by heba magdi
about 6 years ago
|
|
Hard hearing
- External ear
- Collects sound waves and
channel them down the
auditory channel
- Vibration of the
tympanic membrane
- Vibration of the
tympanic membrane
- Collects sound waves and
channel them down the
auditory channel
- Middle ear
- Auditory ossicles
- Malleus
- Sound waves
traveling through
air must be
converted into
pressure waves
in fluid.
- When the sound waves move the tympanic membrane, the chain
of ossicles also moves, pushing the footplate of the stapes into
the oval window and displaces the fluid in the cochlea
- Sound waves
traveling through
air must be
converted into
pressure waves
in fluid.
- Incus
- Stapes
- Malleus
- Auditory ossicles
- Inner ear
- Sensory
organ
- Cochlea
- 3 coiled tubes
- Scala vestibuli
- Contains
perilymph
- Contains
perilymph
- Scala media
- Contains
endolymph
- Contains
endolymph
- Scala tympani
- Contains perilymph
- Contains perilymph
- Reissner's membrane
- Basilar
membrane
- Organ of Corti
lies on it
- Inner hair
cells
- Outer hair
cells
- Inner hair
cells
- Organ of Corti
lies on it
- Helicotrema
- Point of
communication
between the
scala vestibuli
and scala
tympani. Scala
media does
not
communicate
with these
two scala.
- Point of
communication
between the
scala vestibuli
and scala
tympani. Scala
media does
not
communicate
with these
two scala.
- Scala vestibuli
- 3 coiled tubes
- Cochlea
- Sensory
organ
- Tympanic
membrane
- Separates
external ear
from internal
ear
- Pearly gray and
translucent, with a
sharp light reflex
and bony landmarks
- Pearly gray and
translucent, with a
sharp light reflex
and bony landmarks
- Separates
external ear
from internal
ear
- Hearing loss
- Conductive
hearing loss
- sound waves are not
adequately conducted through
the external or middle ear
- Cause: Damage to cochlea, CN VIII
or central auditory connections.
- Air conduction> bone conduction
- Cause: Damage to cochlea, CN VIII
or central auditory connections.
- sound waves are not
adequately conducted through
the external or middle ear
- Sensorineural hearing loss
- Sound waves are not translated into
nerve signals and not recognized as sound
sensations by the brain.
- Etiology: physical blockade
of the ear canal
- Bone conduction> air
conduction
- Etiology: physical blockade
of the ear canal
- Sound waves are not translated into
nerve signals and not recognized as sound
sensations by the brain.
- Presbycusis
- partial loss of hearing as a
result of loss of hair cells
- Caused due to
aging
- Caused due to
aging
- partial loss of hearing as a
result of loss of hair cells
- Conductive
hearing loss
- Infections of the
ear
- Otitis externa
- Inflammation
of the external
ear
- Acute loxalized
otitis externa
- Furunculitis
which leads to
furuncle
formation
- Staphylococcus
aureus
- Staphylococcus
aureus
- Furunculitis
which leads to
furuncle
formation
- Acute diffuse
otitis externa
- Swimmer's ear
- Most
common
form
- Pseudomonas
aeruginosa
- Pseudomonas
aeruginosa
- Most
common
form
- Swimmer's ear
- Acute loxalized
otitis externa
- Inflammation
of the external
ear
- Otitis media
- Inflammation of
the middle ear
- Acute otitis media
- Causative agent
- Streptococcus
pneumonia
- Haemophilus
influenza
- Moraxella
catarahlis
- Streptococcus
pneumonia
- Complication
- Cholesteatoma
formation
- Tympanic membrane retraction
- Lead to pocket that protrudes
into the middle ear
- dead skin cells accumulate
in pocket
- dead skin cells accumulate
in pocket
- Lead to pocket that protrudes
into the middle ear
- Tympanic membrane retraction
- Cholesteatoma
formation
- Causative agent
- Acute otitis media
with effusion
- Chronic otitis media
- Acute otitis media
- Inflammation of
the middle ear
- Otitis externa
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