Week 1 Flashcards
(31 cards)
What is a perception action loop?
Where our actions effect future perceptions
What is vision for perception?
features of objects e.g. colour, size
What is vision for action?
Processing needed to give movements e.g. catching a ball
What regulates the sensory systems?
Nervous system
What is special about human movement?
- Hands (can hold and manipulate objects)
- Planning (better at using flexible cues)
What is anticipatory control?
Where movements are smooth and executed in time
How does anticipatory control occur?
Due to the long time for the brain to given commands to muscles; so they are sometimes given in advance
Where does anticipatory control occur?
Cerebellum
What are motor invariants?
The highly stereotyped trajectories for eye and arm movements e.g. path and velocity
What is the function of the retina?
To connect the eyes and brain, by using light sensitive cells that detect sensory information
How do we see colour?
When we look at a certain colour, that colours cell increases activity = we see that colour every time
What is the resolution problem?
There is too much information in the world, so our brain reduces the amount of information
What is the energy problem?
We dont have enough energy to have our cells to be active all of the time and optic nerve isn’t large enough
What is the solution to the energy and resolution problem?
Compression
What is the key idea of Compression Mechanism I?
Where one colour influences your perception of another colour
When does encoding changes in compression mechanism I?
Over space
How fast is adaption in compression mechanism I?
Fast
What is the definition of lateral inhibition?
Disables the spreading of action potentials from excited to neighbouring cells
Where does lateral inhibition occur?
Retina and motor system
How does lateral inhibition work?
When one cell is active, it turns off its neighbours
Where does tactile inhibition occur?
“upstream” in the spinal cord
When does encoding change in compression mechanism II?
Time
What type of inhibition occurs at compression mechanism II?
Temporal (after effect type illusion)
How fast is adaptation in compression mechanism II?
Slow
