The acting brain

Question 1

action vs. movement

Answer 1

action: cognitive process
movement: physical act - need not to cognitive (reflex)

Question 2

sensory motor transformation problem

Answer 2

the problem of linking together the position of an object and the position of limbs

Question 3

what is preservation?

Answer 3

repeating an action that has been performad but is no longer relevant

Question 4

explain the SAS model

Answer 4

SAS: supervisory attentional system

selects schema’s of automatic behaviour depending from situation

intervention if action requires attention

damage in PFC results in a weaker SAS

Question 5

what is the role of the subcortex in action?

Answer 5

1. cerebellar loop = visual feedback
2. basal ganglia loop = initiation/execution of internally generated movements
3. influences the probability of a movement

Question 6

what is contention scheduling`?

Answer 6

mechanism that selects one particular schema to be enacted from a host of competing schemas

Question 7

what is frontal apraxia?

Answer 7

also called action disorganisation syndrome

failure in routine tasks that involve setting up and maintaining subgoals

no deficit in object recognition etc.

Question 8

what is the forward model?

Answer 8

forward model: representation of the motor command (efference copy) -> used to predict sensory consequences of an action

Question 9

what is optic ataxia?

Answer 9

inability to use vision to guide action