067 The Anatomy and Functions of the Occipital and Temporal Lobes

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

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this is Leslie Samuel that's it for now

and I'll see you in the next one