Class 11 Exam > Class 11 Videos > Inner ear, structure of cochlea - Neural control Cordination, Biology, Class 11
Inner ear, structure of cochlea - Neural control Cordination, Biology, Class 11 Video Lecture
FAQs on Inner ear, structure of cochlea - Neural control Cordination, Biology, Class 11 Video Lecture
| 1. What is the structure of the cochlea? |  |
Ans. The cochlea is a spiral-shaped, fluid-filled structure located in the inner ear. It is divided into three fluid-filled compartments called the scala vestibuli, scala media, and scala tympani. The scala media contains the organ of Corti, which is responsible for converting sound waves into electrical signals that can be interpreted by the brain.
| 2. How does the inner ear contribute to neural control and coordination? | |
Ans. The inner ear plays a crucial role in neural control and coordination. It is responsible for detecting sound waves and converting them into electrical signals that can be processed by the brain. The cochlea, in particular, is involved in the auditory pathway, where it transmits the electrical signals to the brain via the auditory nerve. This allows us to perceive and interpret sounds, helping us coordinate our movements and respond to auditory stimuli.
| 3. What is the function of the organ of Corti in the cochlea? | |
Ans. The organ of Corti is a specialized structure located in the scala media of the cochlea. It contains tiny hair cells that are responsible for converting sound waves into electrical signals. When sound vibrations enter the cochlea, they cause the hair cells to bend, which triggers the release of neurotransmitters. These neurotransmitters then stimulate the auditory nerve fibers, sending electrical signals to the brain for interpretation.
| 4. How does the structure of the cochlea contribute to our ability to hear different frequencies? | |
Ans. The structure of the cochlea is specifically designed to process different frequencies of sound. The cochlea is coiled in such a way that high-frequency sounds are detected near the base, while low-frequency sounds are detected near the apex. Additionally, the basilar membrane within the cochlea varies in stiffness along its length. This stiffness gradient allows different frequencies of sound to cause maximum displacement of the hair cells at specific locations along the basilar membrane, enabling us to perceive different frequencies of sound.
| 5. What happens if there is damage to the cochlea? | |
Ans. Damage to the cochlea can result in hearing loss or impairment. This can occur due to various factors, such as aging, exposure to loud noise, infections, or genetic conditions. When the cochlea is damaged, the hair cells may be unable to properly convert sound waves into electrical signals, leading to a decreased ability to hear or understand sounds. In severe cases, a cochlear implant may be considered as a treatment option to bypass the damaged cochlea and directly stimulate the auditory nerve.
Text Transcript from Video
hello friends this video on neural
control and coordination part 26
there's brought to you by exam feel calm
no more fear from exam next is the most
important part of the hearing that is
the inner fear so in a tear is also
known as that the most important part of
the inner ear is the cochlear so cochlea
which is also known as lavell and so
labyrinth is maddening for cochlear so
it is the fluid-filled part of the inner
here to to spill without fluid now there
are two parts of the labyrinth so what
are the two parts bony labyrinth and the
membranous labyrinth so these are the
two parts of labyrinth so bony labyrinth
is a series of channels on the outer
side it is filled with a fluid called
perilymph whereas membranous labyrinth
and the channels inside the bony
labyrinth so if you look at this coil
structure you can actually see that
inside the inside portions and a series
of channels which are filled with a
fluid called endolymph endo means inside
lay upon the membranous lebanon and
outside that at a bony labyrinth
now bony labyrinth labyrinth is since it
is bony structure so it is present on
the outer side and it can ensure some
protection as well so it is something I
mean I just show you with the help of an
a picture so we'll just see bony and
membranous labyrinth so before we talk
about that it is quickly talk about the
different parts of the labyrinth so an
important part of the cochlea labyrinth
is nothing but the fluid filled in it
here so as I said this
in a violent current structure which you
see that entire structure is either here
or labyrinth it is of two parts it is
going to be divided into two parts that
inner portion is the bony labyrinth is
the membranous labyrinth an outer
portion is the membranous slab is the
bony labyrinth so inner portion is
membranous and outer portion is bony now
there are many different parts of the
labyrinth one important part is the
cochlea which is this coil structure
next important part is the vestibular
apparatus which is this entire part so
this entire part is cochlea and this
entire Park is the vestibular apparatus
so let us talk about both of these parts
in detail so first let us talk about the
cochlea it is the coil portion of the
labyrinth as you can see it is a highly
coiled structure pressure vibrations
converted into electrical signals so
this is the area where the pressure
vibrations which were received up till
now they are converted into electrical
signals because only electrical signals
can be transmitted to the brain through
the nerves so the pressure vibrations
converted into electrical signals here
vestibular apparatus is a complex system
which is located above cochlea so this
system above Poppaea is the vestibular
apparatus it is responsible for
maintenance of body balance and question
so maintenance of the body balance and
posture is its main job that is the
vestibular apparatus now how do cochlear
and vestibular but cavalry does perform
their job that we will see a little
later so let us talk about cochlear
first now the membrane constituting the
cochlea so what are the membranes which
form the cochlea so there are two
membranes that is the basilar membrane
and the rest
membrane so many new memes right so let
us have a detailed look at the cochlea
so this is how the cochlea looks like so
as I was mentioning you before that the
cochlea is made up of I mean the
labyrinth is actually made up of a bony
labyrinth of Evelina's labyrinth so here
if you see this light purple colored
structure which is the outer layer that
is the bony labyrinth and this inner
layer which is a dark blue color that is
the membranous labyrinth so if you see
this is present to walk throughout this
dark blue but it is the inner structure
and the light purple color is the outer
structure now right now we are talking
about the cochlea so that means we are
talking only about this much portion the
quiet structure so let us see now this
is a detailed structure of cochlea only
the coiled structure so that structure
is in detail that looks immediately like
this so this is broadly divided into two
parts that is kala
vestibuli and the scala tympani so we're
in scalar vestibule ions kala tympani
now as I said there are two membranes
which form the cochlea so what are those
two membranes the basilar membrane so
this membrane is the basilar membrane so
here the membrane which you see that is
the basilar membrane and which is the
resonance membrane so this membrane is
the Reznor's membrane so these are the
two membranes which form the cochlea now
the bony labyrinth that is the outer
side of labyrinth of the cochlea engine
is divided into two parts one is scalar
vestibule eye this region is scaled up
vestibule eye and the lower region is
the scalar
tympani now what is the purpose of these
regions so scalar vestibule is the upper
part
and it ends at the open window so you
remember which is the oval window the
oval window of that inner year so you
have the oval window somewhere here so
this is where it ends
skeleton panel is the lower part that is
this part and it ends at the round
window so this ends at the round window
of the use tacky and - so that is how
the internal structure is linked now
other than this there is not the region
on the scaler media which is the space
inside the cochlea so there is a scalar
media so this space inside the cochlea
is known as the scalar medium so this
region is scalar medium right and this
region is filled with endolymph so
endolymph
is present here so this is the inside
portion so basically if you see
endolymph was present inside the
membranous labyrinth right so this forms
a part of the membranous labyrinth
because it is the inside portion and the
outer portion is the bony labyrinth and
they are filled with perilymph now there
is another important part of the cochlea
that is the organ of Corti so what does
this order of courtiers rest it is a
structure at the basilar membrane so
here you have the organ of Corti so here
the structure which you see that this is
organ of Corti and here hair cells are
present here which act as auditory
receptors so like how in case of eye you
have the photoreceptor cells located in
the retina similarly here the ordinary
receptor cells the cells which can
actually recognize sound waves those
cells are located in the organ of Corti
which is in turn is located on the
basilar membrane of the inert unit right
so now these hair cells how are they
organized
if you can see here the air sets are
organized in rows on the internal side
of the king of the organ of Corti and
also if you know that each ASL you will
see that their bottom or the basal end
of the gear cell is in contact with an
afferent nerve fiber so this is how the
hair cells are let us suppose these are
the hair cells inside the order of
cotton so let us suppose these are the
hair cells so these hair cells and
in the form of rows on the internal side
as I said now the basal end of the cell
is in contact with a nerve fiber
so if you see this is the baseline end
of the base of the hair they are in
comparing connection or they are in
contact with a nerve fiber and this
nerve fiber as soon as the afferent
nerve fiber we all know what is afferent
nerve fiber it is that nerve fiber which
brings in information it brings in
information to these a leg structures
and there are many spiria like
structures which are present on the
apical part of this hair cell and these
structures which are present on the
apical side these are known as stereo
Celia so they are smooth microcredit
structures for Speed stereocilia
which are present on its apple apical
end and also there is a membrane above
this hair like straw here sense and this
membrane which is present above is known
as the tectorial membrane so if you
actually try to look at the internal
structure of the ear space especially
the inner ear you will see that there
are a lot of small small components so
even here if you look at the picture
here you can see that the tectorial
membrane is somewhere here just above
the hair cells near the organ of Corti
so this is how the structure of the
cochlea is so now you understand the
significance of cochlea cochlea has been
hair cells in the organ of Corti which
acts as the auditory receptors
thank you please visit www.payoor.com
to watch more videos attempt free online
test
get free study material find
tutors and mentors thank you once again
control and coordination part 26
there's brought to you by exam feel calm
no more fear from exam next is the most
important part of the hearing that is
the inner fear so in a tear is also
known as that the most important part of
the inner ear is the cochlear so cochlea
which is also known as lavell and so
labyrinth is maddening for cochlear so
it is the fluid-filled part of the inner
here to to spill without fluid now there
are two parts of the labyrinth so what
are the two parts bony labyrinth and the
membranous labyrinth so these are the
two parts of labyrinth so bony labyrinth
is a series of channels on the outer
side it is filled with a fluid called
perilymph whereas membranous labyrinth
and the channels inside the bony
labyrinth so if you look at this coil
structure you can actually see that
inside the inside portions and a series
of channels which are filled with a
fluid called endolymph endo means inside
lay upon the membranous lebanon and
outside that at a bony labyrinth
now bony labyrinth labyrinth is since it
is bony structure so it is present on
the outer side and it can ensure some
protection as well so it is something I
mean I just show you with the help of an
a picture so we'll just see bony and
membranous labyrinth so before we talk
about that it is quickly talk about the
different parts of the labyrinth so an
important part of the cochlea labyrinth
is nothing but the fluid filled in it
here so as I said this
in a violent current structure which you
see that entire structure is either here
or labyrinth it is of two parts it is
going to be divided into two parts that
inner portion is the bony labyrinth is
the membranous labyrinth an outer
portion is the membranous slab is the
bony labyrinth so inner portion is
membranous and outer portion is bony now
there are many different parts of the
labyrinth one important part is the
cochlea which is this coil structure
next important part is the vestibular
apparatus which is this entire part so
this entire part is cochlea and this
entire Park is the vestibular apparatus
so let us talk about both of these parts
in detail so first let us talk about the
cochlea it is the coil portion of the
labyrinth as you can see it is a highly
coiled structure pressure vibrations
converted into electrical signals so
this is the area where the pressure
vibrations which were received up till
now they are converted into electrical
signals because only electrical signals
can be transmitted to the brain through
the nerves so the pressure vibrations
converted into electrical signals here
vestibular apparatus is a complex system
which is located above cochlea so this
system above Poppaea is the vestibular
apparatus it is responsible for
maintenance of body balance and question
so maintenance of the body balance and
posture is its main job that is the
vestibular apparatus now how do cochlear
and vestibular but cavalry does perform
their job that we will see a little
later so let us talk about cochlear
first now the membrane constituting the
cochlea so what are the membranes which
form the cochlea so there are two
membranes that is the basilar membrane
and the rest
membrane so many new memes right so let
us have a detailed look at the cochlea
so this is how the cochlea looks like so
as I was mentioning you before that the
cochlea is made up of I mean the
labyrinth is actually made up of a bony
labyrinth of Evelina's labyrinth so here
if you see this light purple colored
structure which is the outer layer that
is the bony labyrinth and this inner
layer which is a dark blue color that is
the membranous labyrinth so if you see
this is present to walk throughout this
dark blue but it is the inner structure
and the light purple color is the outer
structure now right now we are talking
about the cochlea so that means we are
talking only about this much portion the
quiet structure so let us see now this
is a detailed structure of cochlea only
the coiled structure so that structure
is in detail that looks immediately like
this so this is broadly divided into two
parts that is kala
vestibuli and the scala tympani so we're
in scalar vestibule ions kala tympani
now as I said there are two membranes
which form the cochlea so what are those
two membranes the basilar membrane so
this membrane is the basilar membrane so
here the membrane which you see that is
the basilar membrane and which is the
resonance membrane so this membrane is
the Reznor's membrane so these are the
two membranes which form the cochlea now
the bony labyrinth that is the outer
side of labyrinth of the cochlea engine
is divided into two parts one is scalar
vestibule eye this region is scaled up
vestibule eye and the lower region is
the scalar
tympani now what is the purpose of these
regions so scalar vestibule is the upper
part
and it ends at the open window so you
remember which is the oval window the
oval window of that inner year so you
have the oval window somewhere here so
this is where it ends
skeleton panel is the lower part that is
this part and it ends at the round
window so this ends at the round window
of the use tacky and - so that is how
the internal structure is linked now
other than this there is not the region
on the scaler media which is the space
inside the cochlea so there is a scalar
media so this space inside the cochlea
is known as the scalar medium so this
region is scalar medium right and this
region is filled with endolymph so
endolymph
is present here so this is the inside
portion so basically if you see
endolymph was present inside the
membranous labyrinth right so this forms
a part of the membranous labyrinth
because it is the inside portion and the
outer portion is the bony labyrinth and
they are filled with perilymph now there
is another important part of the cochlea
that is the organ of Corti so what does
this order of courtiers rest it is a
structure at the basilar membrane so
here you have the organ of Corti so here
the structure which you see that this is
organ of Corti and here hair cells are
present here which act as auditory
receptors so like how in case of eye you
have the photoreceptor cells located in
the retina similarly here the ordinary
receptor cells the cells which can
actually recognize sound waves those
cells are located in the organ of Corti
which is in turn is located on the
basilar membrane of the inert unit right
so now these hair cells how are they
organized
if you can see here the air sets are
organized in rows on the internal side
of the king of the organ of Corti and
also if you know that each ASL you will
see that their bottom or the basal end
of the gear cell is in contact with an
afferent nerve fiber so this is how the
hair cells are let us suppose these are
the hair cells inside the order of
cotton so let us suppose these are the
hair cells so these hair cells and
in the form of rows on the internal side
as I said now the basal end of the cell
is in contact with a nerve fiber
so if you see this is the baseline end
of the base of the hair they are in
comparing connection or they are in
contact with a nerve fiber and this
nerve fiber as soon as the afferent
nerve fiber we all know what is afferent
nerve fiber it is that nerve fiber which
brings in information it brings in
information to these a leg structures
and there are many spiria like
structures which are present on the
apical part of this hair cell and these
structures which are present on the
apical side these are known as stereo
Celia so they are smooth microcredit
structures for Speed stereocilia
which are present on its apple apical
end and also there is a membrane above
this hair like straw here sense and this
membrane which is present above is known
as the tectorial membrane so if you
actually try to look at the internal
structure of the ear space especially
the inner ear you will see that there
are a lot of small small components so
even here if you look at the picture
here you can see that the tectorial
membrane is somewhere here just above
the hair cells near the organ of Corti
so this is how the structure of the
cochlea is so now you understand the
significance of cochlea cochlea has been
hair cells in the organ of Corti which
acts as the auditory receptors
thank you please visit www.payoor.com
to watch more videos attempt free online
test
get free study material find
tutors and mentors thank you once again
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