hello and welcome to another episode of
interactive biology TV where we're
making biology fun my name is Leslie
Samuel and in this episode episode 67
I'm going to be talking about the
anatomy and functions of the occipital
and temporal lobes so let's get right
into it
the occipital lobe you can see it here
to the posterior end of the brain and
it's here in pink now you just see a
small surface here but I do want to
emphasize that it also extends medially
so it's more prominent as you go more
medially into the brain and we're going
to see that in the next slide this is
the primary visual cortex so so when you
see something light is coming into the
eyes it's hitting the rods and the cones
in the retina and there are some signals
being sent to the brain those signals
that are sent to the brain are coming to
the visual cortex in the occipital lobe
and then there's processing that's
happening there if you want to review
how that happens in the eyes you can
check out episode 34 and 35 where we
deal with some of those things in terms
of how the rods and the cones process
the information and then how they are
sent to the brain and this is the region
in the brain that they're coming so that
they can be processed and so that you
can see this screen and you can see all
of the things that you see alright let's
look at a midsagittal section so that we
can see the medial aspect of the brain
and you can see here let's do it in blue
you can see in this area we have the
occipital lobe so you were just seeing
the outside surface and it does extend
more medially so you can see that here
okay let's move on now to the temporal
lobe and a temporal lobe you can see is
over here it's kind of to the side of
the brain and it's in green and the
temporal lobe is involved in processing
auditory signals now we've spoken about
how hearing happens you can look from
episode 36 through 40 I cover hearing
their and specifically in episode 40 I
spoke about the hair cells and about how
when you hear something their vibrations
that are happening and that causes the
hair cells to bend and when they Bend
they send signals to the brain so this
is the region we're talking about in the
brain now specifically there's a region
that's not shown the gyri of Heschel and
that is found in the most superior inner
aspect of the temporal lobe so as we go
more medial you'll see we have some gyri
and we call those gyri of Heschel and
that is where we find the primary
auditory receiving area so this is where
the signals are coming from the hair
cells so that we can hear stuff alright
let's go a little further into the
temporal lobe we're going to look at the
three regions we have the superior
temporal gyrus the middle temporal gyrus
and the inferior temporal gyrus okay so
those are the three sections and you can
see they're separated by these two sulci
and when I look at something that's
moving there's some processing that
needs to happen for me to understand
that that object is moving and their
regions in the middle and inferior gyri
that are involved in perceiving moving
objects and also recognizing faces so
you're getting now into some more
detailed processing so that you can see
someone and recognize who they are by
looking at their face you can understand
that objects are moving because of the
processing that's happening in these
areas that's pretty much all I want to
say about that for now as usual you can
visit the website at interactive -
biology comm and there you can find more
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kinds of resources to help make biology
fun
this is Leslie Samuel that's it for now
and I'll see you in the next one