Name: 軀體感覺道｜器官系統｜MCAT｜可汗學院 (Somatosensory tracts | Organ Systems | MCAT | Khan Academy)
Uploaded: 2021-01-14T06:42:07.000Z
Duration: 7 min 7 s
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I'm going to talk about the somatosensory tracts.

Somatosensory, which are the senses of the body,

and tracts, which are collections of axons

travelling together through the central nervous system.

The different types of somatosensory information

as they move through the central nervous system.

In general, the different types of somatosensation

from most of the body is going to travel back

through nerves in the peripheral nervous system,

and then spinal nerves that'll enter the spinal cord.

let's say we have a receptor that carries

That information is going to travel in nerves

and then spinal nerves to enter the spinal cord

and deliver that information into the spinal cord.

The same thing with this other big category

Let's say we had some sort of receptor here

down in the leg, I'll just write an R for receptor

through nerves of the peripheral nervous system

The same is true for somatosensory information

from the face and other parts of the head,

but that information will enter usually the brain stem

that can detect vibration somewhere here on the face,

that information can travel through a cranial nerve

If we had another receptor here in the face

one of these other types of somatosensation,

that also could travel through a cranial nerve

But now what happens once this information is delivered,

into either the spinal cord or into the brain stem-

So I've taken the brain and the spinal cord,

and I've drawn a little bigger illustration over here.

We're still looking at it from the front,

but I've kind of cut into the brain here,

and temperature sense and gross touch sense.

some of that coming in from the leg on one side.

Let me just draw an arrow, showing that information

neuron axons are going to carry that information

up to the brain, in one of these somatosensory tracts,

to this category of types of somatosensation.

but I'm going to leave out some of the details.

that it actually crosses to the other side,

and then goes up through the spinal cord,

and then comes to a place kind of deep down

a little bit more in another one of these videos.

it's actually coming into the cerebral hemisphere

on the other side, from the part of the body

for this other category of types of somatosensation,

Let's say, just like I drew some of that information

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軀體感覺道｜器官系統｜MCAT｜可汗學院 (Somatosensory tracts | Organ Systems | MCAT | Khan Academy)

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