Lecture 20 - Principles of motor control Flashcards

1
Q

what are marr’s 3 levels of analysis of the brain?

A

implementational (what is system made from), algorithmic (what does system do), computational (what problem does it solve)

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2
Q

which one of marr’s 3 levels of analysis does the motor system carry out?

A

computational

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3
Q

give an example of simple feedback (servo) control and what happens to the feedback control in the example

A

multi joint movements e.g picking up object to your right with your left arm (as you get closer to object target on right, feedback control decreases)

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4
Q

feedback control with time delays is either…..

A

very slow or unstable

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5
Q

the motor system uses knowledge about the body and environment to make fast feedforwards movements even when feedback is slow, this is known as an……. model mapping consequence to …….

A

internal /inverse, cause

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6
Q

what does the forward model predict? what can it distinguish between?

A

sensory consequences of actions, can distinguish between self-generated and external sensory feedback - can’t tickle yourself

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7
Q

in signal dependent noise in force production, the higher the muscle force being generated, the higher the …….

A

inaccuracy

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8
Q

to calculate the inaccuracy of force hen 2 agonist muscles are used, what would you do?

A

add the inaccuracies

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9
Q

give the equation for signal dependent noise

A

sigma (variance) = k x F (force)

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10
Q

describe the uncontrolled manifold hypothesis

A

skilled movements are characterised by repetition without repetition - slightly different movements achieve the same goal

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11
Q

what is the name of the best current model of how the brain controls complex, skillful movement?

A

optimal feedback control theory

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