THE EAR ANATOMY & PHYSIOLOGY 熊覌霞（ VICKY XIONG) Otorhinolaryngology Hospital of the First Affiliated Hospital of Sun Yat-sen University Otorhinolaryngology Institute of Sun Yat-sen University Mobil ： 13711227500 E-mail:email@example.com
Cochlea: Scala vestibuli Scala media Scala tympani
-Line on the inner part of the basilar membrane,contains: Inner hair cell : *is connected to several afferent fibers of the cochlear nerver. *are the actual “hearing cells” which transform acoustic information into nerve pulses . Outer hair cell ： *there are three to four times more outer hair cell than inner hair cell(near 12,000). *are viewed as the effector or “motor” of the cochlear amplifier. Support cell: Tectorial membrane: * connect the ciliated surfaces of the seneory cells. *cover the sensory cell region of the corti organ. Corti organ (Spiral organ)
Corti organ (Spiral organ) Inner hair cell outer hair cell
The cochlear ： conduction + sense
Air conduction :
sound － the external － eardrum--ossicular chain
－ the inner － acoustic.N － brain
Bone conduction :
under 800Hz- - translatory mode bone conduction
upper 800Hz- - compressional mode of bone conduction
PHYSIOLOGY- HEARING How we hear?
How we hear ?
PHYSIOLOGY -BALANCE The vestibule and semicircular canals form the peripheral balance organ. These have connections to the cerebellum and the eyes, and are important in the maintenance of posture and the ability to keep the eyes fixed when the head is moving.