Psych 251 - Topic 4 - Action

Skeletal muscles : move limbs

-Smooth muscles: change blood pressure, digest food
-cardiac muscles: heartbeat
-endocrine glands: secrete hormones
-Exocrine glands: secrete sweat, saliva etc

-update memory, switch tasks etc. Not occuring out in environment, but brain uses same patterns sometimes for these nternal actions

Rostral, dorsal

Breaks it down into chunks step by step

Eg can draw with hand, foot, teeth, even though they are controlled by completely different muscles
--> shows that at a high level the plan isn't about what muscles to move, its lower down in hierarchy that figure out which muscles to move
= motor equivilence

•current position and desired position
--> motor comands
--> used to create motor plans

- good for figuring out how to get to some desired goal state

-helpful because once you've decided what you want to do , can compare where you want it to go with where it's going along the way and if something goes wrong you can detect it as quickly as possible

-Current position & motor commands
--> predicted position
-Used to evaluate motor plans and/or action

-brain comes up with motor command, can send to motor control, AND send a copy to another part of brain, so don't have to wait to see what muscle actually does.
--> used for the prediction

Send a command to a limb and then hope its executed correctly
-Faster but less accurate

--> eg used for eye movements (saccades)

Motor command sent to muscle
-actual state compared to desired state
-Adjustments made based on errors
-slower but mor accurate

Inverse

-terminology is confusing
-in feedforward, uses an inverse model because its using a desired state and working back

In the feedback state during feedback control

Selecting goals and planning actions at a conceptual level
-particularly when plans are driven by external stimuli
(idea that you will drink from cup)

Goals