Final Lecture 18: March 28 Flashcards
(40 cards)
what is considered our “sixth sense”?
vestibular system and our sense of equilibrium
Modalities and qualities of spatial orientation
Sense of linear motion
Sense of angular motion
Sense of tilt
what is Sense of linear motion :
the perceptual modality that senses translation.
what is -> Sense of angular motion:
the perceptual modality that senses head rotation from side to side (as if to say “no”).
what is -> Sense of tilt:
the perceptual modality that senses head inclination with respect to gravity.
Sense of linear motion
Sense of angular motion
Sense of tilt
these are considered what
These are different considered senses (like audition and vision) and not different qualities of the same sense because they transduce different energies.
- > linear acceleration - > angular acceleration - > gravity
The main peripheral component of the vestibular system is what
the labyrinth:
what is the labyrinth:
an elaborate set of interconnected chambers.
The labyrinth has many things in common with what
the cochlea (hair cells, endolymph, etc.).
The labyrinth consists of what
two otolith organs, the utricule and saccule, and three semicircular canals
Hair cells are located in the
what
utricule and saccule,
tree ampullae located where
at the basis of the semi-circular canals.
The two otilith organs are responsible for perception of: what
1) linear accelaration, and 2) gravity.
The semicircular canals are responsible for perceiving what
of rotatation.
what is th Principle of equivalence
Gravity and Linear accelaration are fundamentally the same thing
(you feel the same in space as you do free falling
you also feel the same on earth as you do in a rocket)
go over the lecture for the vestibular system– cant do in flash cards
do it
starting at sensory integration
slide 18
what is Sensory integration:
The process of combining different sensory signals.
->Typically leads to more accurate information than can be obtained from individual senses alone.
what is Vection:
An illusory sense of self motion produced when you are not, in fact, moving.
Example: Being stopped in your car at a light next to a semi. The semi begins to roll forward and you press on the brake because you feel as if you are rolling backwards.
what is Rotational vection
Subjects have the illusion of tilt but do not feel as if they turn upside-down.
- The vestibular system’s sense of gravity stops the illusion.
what is Motion sickness:
Results when there is a disagreement the vestibular system, and vision.
-> Could be an evolutionary response to being poisoned
what are Vestibulo-spinal reflexes
A whole family of reflexes that work together to keep us from falling over
Without vestibulo-spinal responses, we would be unable to stand up in the dark.
Patients with vestibular loss actually over-compensate for body sway.
Galvanic vestibular stimulation
what is Somatosensation:
Collectively, sensory signals from the skin, muscles, tendons, joints, and internal receptors.
what is Kinesthesia:
Perception of the position and movement of our limbs in space.
