Now what are some the other senses that come to
forefront? Again, we have a lot of different senses
and we highlighted the usual, the usual suspects,
but there are a couple other that I wanted to
highlight as well. One is kinesthetic sense or
proprioception. This is you being aware of yourself.
Now how do I know right now that I’m actually standing
this way versus this way? Or how do you know that
when you’re leaning your arm against on a counter
that it's actually there? So that self-report of
being aware of where you are or what you’re doing
or what you’re touching is called proprioception.
You can have a muscle spindle, which is a mechanoreceptor
found in certain muscle stretch. Again, as you
stretch a muscle, you need that information to be
sent back, saying, this muscle is being stretched.
So there's a lot of feedback senses that are happening.
You can have Golgi tendon organs which monitor
tension and certain tendons. You can have joint capsule
receptors which detect pressure tension and movement
in the joints. And you can have the proprioception
which I mentioned already. So all of these are
providing a lot of feedback towards movement,
stance and muscle. All really, really important
as well. And a lot of these used to go sort of
undetected or unannounced, not by your body but by
yourself. Cognitively speaking, you’re not aware of
the fact that you’re aware that you are standing
in a certain fashion. We’re also going to look at
something called your vestibular sense. This is a
really neat thing. Again, you very rarely think
about this, but this is your sense of balance
and spatial orientation, and this helps with
coordinating your movement and balance.
And the only time you’re actually aware of that,
you have these vestibular senses when things go awry.
When you lose your balance, so you get really,
really dizzy. That’s when you’re like,
“Okay, something’s wrong.” So things like, you know,
literally, dizziness or vertigo are linked to
some issues with your vestibular sense. So what this
does is it coordinates the cochlea, which is found
in your ear to determine rotational and translational
movement. So I think we all understand what rotational
means. That would be movement like this and
translational would be movement along an axis
this way. So forward to back. Rock, a rocking motion
this way. So the two components are usually learning
to do different structures. So the semicircular
canal system is what mediates and manages the
rotational movements. So what it does is, it knows
how the rotational movement. Now if you go on a ride
at the local carnival that spins you around,
that movement tells you that you're upside down,
or that you're sitting backwards. And it moves as
you move because it's fluid filled. The otoliths
indicate linear accelerations. And the two structures
in specific are the uttricle and saccule.
And you can see them here in the diagram. The best
analogy for this movement to use is a long tube
partly filled with water. As that tube is moved
forward and back, that liquid is going to move
this way and there is a wave action. That wave
action allows you to indicate linear accelerations.
So all this information is gathered and is sent to
the cerebellum for processing. That allows you to get
that 3D orientation of where am I in the rotational
space and where am I in the translational space.
So you’re getting all of this information.
So collectively, we term that the vestibular sense.
So we’ve walked through a whole bunch of senses
quite quickly, but I hope you appreciate the fact
that we do a have a lot of senses. We do interact
with our environment. All that information gets
processed up in the central nervous system at
different brain regions and allows us to process,
interpret, and respond to that information.