Topic 1 - Movement Measures

Question 1

2 types of movement measures

Answer 1

1. Behavioural
   - temporal -> when, how long?
   - error -> where?
2. Electrophysiological
   - electromyography (EMG)
   
   • muscle electrical activity
   • force bc force js highly relates to electrical activity generated by the muscle

Question 2

Reaction Time

Answer 2

Stimulus onset until response initiation

Central and peripheral processing (how quickly you interpret stimulus info and program/ iniate a movement)

Question 3

Movement Time

Answer 3

Response initiation until response termination

Gives indication of how the movement was programmes and the efficiency kf feedbsck utilization

Question 4

Simple RT

Answer 4

No response competition bc only one stimulus and action

Question 5

Choice RT

Answer 5

High degree of response competition bc multiple stimuli with specific responses

Question 6

2 tyoes of Error Measures

Answer 6

1. Constant error

2. Variable error

Question 7

Constant Error

Answer 7

DL - AL =

Tells us about behavioural bias

Question 8

Variable error

Answer 8

Distribution of the errors

Tells us the consistency of behaviour

Question 9

2 types of EMG approaches

Answer 9

1. Fine wire approach
   - less noise bc only one muscle fibre
2. Surface EMG
   - more noise bc many muscle fibres / MUs

Question 10

With more force, do myscle EMG singlas increase or decrease?

Answer 10

Increase with more force bc more MUs or larger MUs

Question 11

When signals are rectified they can tell us about ______?

Answer 11

Force

Question 12

Pre-motor time

Answer 12

Stimulus onset until onset of muscle activity

Tells us about central (high order) processing and perioheral nerve integrity

Question 13

Motor time

Answer 13

Onset of muscle activity to inset of movement

Tells us about peripheral mechanical characteristics (muscle stiffness, inertia)