Motor hierarchy till spinal

Question 1

Motor programs (goals)

Answer 1

At highest level of motor hierarchy, motor programs are a set of commands to initiate a sequence of movements

Question 2

Motor invariance

Answer 2

Ability to execute same motor actions with different body parts. Evidence for motor programs at top of hierarchy

Question 3

Motor execution (muscles)

Answer 3

Lowest level, elementary behavioral units activate individual muscle fibers. Direct link betw. action potential in specific neuron and simple muscle contraction

Question 4

1. Highest level structures (planning)

Answer 4

SMA (top, no sensory info required)
Premotor cortex (involved in learning, input required)
Prefrontal area

Question 5

2. M1 (Motor cortex)

Answer 5

Partially involved in planning of movement, partially in activating specific muscle groups

Question 6

3. Basal Ganglia

Answer 6

Selecting and inhibiting motor actions and simple learning

Question 7

4. Cerebellum

Answer 7

Adjusting ongoing movements. Sensory motor coordination

Question 8

5. Brainstem

Answer 8

Relaying motor signals and adjusting posture

Question 9

6. Spinal cord

Answer 9

Direct activation of single fibers and taking care of reflexes