Action Preperation Part 2

Question 1

2 personal characteristics affecting RT

Answer 1

Alertness
-immediate task, vigilance task
Direction of focus/attention
- sensory set, movement set

Question 2

What does Motor control system do when we get ready to perform action

Answer 2

Action intention -> action preparation/organization -> action initiation -> action termination

Question 3

Five practical aspects of action prep

Answer 3

Postural prep
Limb performance characteristics
Object control characteristics
Sequence of movements
Rhythmicity prep

Question 4

AKA for postural preparation

Answer 4

Anticipatory postural adjustments

Question 5

How does postural prep occur

Answer 5

Prior to excecution of an intended action, additional muscles activate
Occurs unconsciously
Even simple actions require complex synergistic system of muscles to work together

Question 6

What is the relationship which has a basic in preperation of postural prep movements

Answer 6

Movement time and movement accuracy demands (Fitts law)

Question 7

Examples of postural prep

Answer 7

Sit to stand
Pelvis control in deadlift (lat dorsi vs abdominals)

Question 8

Preperation of limb movement characteristics

Answer 8

Selecting and organizing the movement characteristics of the limb according to the task constraints and characteristics

Question 9

features of limb movement

Answer 9

1. Direction
2. TRAJECTORY (path limb follows)
3. End point accuracy
4. Hand/finger movements

Question 10

End point accuracy

Answer 10

Constraining the limb movement to meet accuracy constraints of the task
E.g. speed vs accuracy

Question 11

Prep of movements for object control when action involves manipulating an object

Answer 11

1. Force control
2. End state comfort control

Question 12

Force control

Answer 12

Pre setting the amount of force required to lift or move the object

Question 13

End state comfort control

Answer 13

We grasp objects based on what we plan to do with them
Dominant over non-dominant hand

Question 14

Why do we grasp objects based on what we plan to do with them

Answer 14

• makes action more comfortable
• precision greater, movement faster

Question 15

Prep of sequences of movements

Answer 15

Short sequences of movements prepared in advance
Ie) playing piano, speaking, typing
Kinematic charateristics (in hands, lips, tongue) modified by elements that come before and/or after them
Ie) tongue twister

Question 16

In prep of sequences of movement as complexity increases

Answer 16

Results in systematic increases in RT or errors

Question 17

Rhythmicity prep

Answer 17

Many skills require that the component movements follow specific rhythmic patterns
- pre performance rituals
- high correlation between relative time for ritual behaviours and successful performance