EAR
HISTOLOGY AND
DEVELOPMENT
Assoc. Prof. Nazlı Ece Ordueri
,Leraning Objectives
• Know the structural differences between the outer, middle
and inner ear and what their functions are. Be able to
recognize them at the light microscope and EM levels.
• Be able to distinguish the auditory parts of the inner ear
from those of the vestibular system. What are their roles
in hearing and balance?
• What are sensory hair cells? How do they differ (in
appearance and function) from neurons of the spiral
ganglion?
• What is presently the only known "cure" for deafness
besides hearing aids?
, EAR
auditory system: perception of sound
vestibular system: maintaining balance
VESTIBULOCCHLEAR
DEVICE / APPARAT
, Consists of three parts:
1-Outer ear (Auris externa); picks up sound waves.
2-Middle ear (Auris media); It transmits sound
waves to the inner ear through the middle ear
bones.
3-Inner ear (Auris interna); it translates these
vibrations into specific nerve impulses that can be
transmitted to the nerve center via the N. cochlearis
(acoustic nerve, auditory nerve).
The inner ear also contains the vestibular organ for
balancing.
HISTOLOGY AND
DEVELOPMENT
Assoc. Prof. Nazlı Ece Ordueri
,Leraning Objectives
• Know the structural differences between the outer, middle
and inner ear and what their functions are. Be able to
recognize them at the light microscope and EM levels.
• Be able to distinguish the auditory parts of the inner ear
from those of the vestibular system. What are their roles
in hearing and balance?
• What are sensory hair cells? How do they differ (in
appearance and function) from neurons of the spiral
ganglion?
• What is presently the only known "cure" for deafness
besides hearing aids?
, EAR
auditory system: perception of sound
vestibular system: maintaining balance
VESTIBULOCCHLEAR
DEVICE / APPARAT
, Consists of three parts:
1-Outer ear (Auris externa); picks up sound waves.
2-Middle ear (Auris media); It transmits sound
waves to the inner ear through the middle ear
bones.
3-Inner ear (Auris interna); it translates these
vibrations into specific nerve impulses that can be
transmitted to the nerve center via the N. cochlearis
(acoustic nerve, auditory nerve).
The inner ear also contains the vestibular organ for
balancing.
