Name the Senses

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來自 The University of Chicago 的課程

了解大脑：日常生活中的神经生物学

624 個評分

The University of Chicago

了解大脑：日常生活中的神经生物学

624 個評分

Learn how the nervous system produces behavior, how we use our brain every day, and how neuroscience can explain the common problems afflicting people today. We will study functional human neuroanatomy and neuronal communication, and then use this information to understand how we perceive the outside world, move our bodies voluntarily, stay alive, and play well with others.

從本節課中

Perception and Vision

Perception is how the brain interprets incoming stimuli. Not all stimuli that can be sensed are perceivable, and sometimes those that can be perceived play tricks on us. The systematic ways that stimuli are interpreted (or misinterpreted) show how well the brain can understand our surroundings, sometimes with limited information. This module we will explore perception and vision.This module contains a lot of material, so be sure to start early so that you have time to finish!

Introduction to Perception4:01

Sensory Interpretation: Optical Illusions3:33

Sensory Interpretation: Auditory Illusions3:09

Sensory Interpretation: Weber's Law4:06

Stimulus Set7:07

The Road to Perception5:10

Name the Senses4:53

與講師見面

Peggy Mason
Professor
Neurobiology

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Okay, before we concentrate on vision and hearing,

let's just understand what, what's the landscape of perceptions?

Are there five?

That is a common thing that's taught at least in the United States.

well, no, there're not five, there're many more.

So, these are the five that are usually

talked about, vision, hearing, smell, taste, and touch.

And to that we can right off the bat add the vestibulars to that sense.

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Where we are in space.

But in addition, there's another thing that is important, and

that is that each one of these, and we'll take the example of of touch.

Actually, has several what we call modalities.

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[COUGH] And so the modalities in the somantic sensory system, are light touch.

We can actually feel hair bending.

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Hair bending.

We could feel vibration.

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We can feel cool and warm and we can perceive, we can

a sti, a noxious stimulus can cause pain, which

can be aching or stabbing, or shooting, etcetera.

So many varieties of that.

So, there're many modalities and, and a

similar thing can be said for instance, vision.

We have a a low light intensity vision,

which is good at for sensitivity, and for motion.

And we have color vision, etcetera.

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And one other way to think about this, is that these are the modalities,

this is how the, the nervous system divides up these various,

systems, but what do we perceive, what do we actually work with?

Well, for instance, let's think about eating.

In a, in the case of, eating something, we

actually use these three, and to make up flavor.

So flavor is a little bit of taste, maybe 10% or something like that.

It's maybe 70% smell, but it's also highly influenced by touch.

Not by touch so much as by not vibration ,sorry, temperature.

So it's temperature and texture.

[BLANK_AUDIO].

Temperature and texture.

Food can ha, taste well, taste and smell good, but have a bad temperature.

It can have a bad texture.

One that somebody doesn't like.

So we, we make compound sensations that use these various systems.

Another example of a compound sensation is touch,

plus cold gives us wet, and if we, if we don't have those two,

we can't detect wet and you can test this for yourself.

If you have a non-hairy part to your body, put that put your hand into

room temp or body temperature water, and you won't be able to detect that it's wet.

Unless it's cold and unless it moves the hairs on your, on your

body.

So, this, for this reason swimmers who

competitive swimmers who shave, when they get

into a warm pool, they don't particularly know where the the water begins and ends.

In any case, normally, we're using all of our senses

to make a picture of what's going on in the world.

What we're going to do in the next couple of modules, is to

look at vision and then in the next unit, we'll look at hearing.

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