Unit 6-Motor control

Question 1

What is a motor event?

Answer 1

the consequence of the coordinated and simultaneous activity of many cortical and subcortical areas.

Question 2

Explain the systems theory

Answer 2

Motor/postural control is specific to each activity and depends on feed forward (feedback, anticipation) and peripheral inputs.

The different systems involved are:
* Ascendent pathways (as studied on unit 4)
* Descendent pathways
* Association areas

In order to plan, coordinate and execute motor programs, an adequate prior
sensory representation is necessary.

Motor mechanisms are directly related to sensory function.

Question 3

what is postural control?

Answer 3

Postural control is based on adjusting the orientation and position of the internal
segments in order to act in relation to the outside world.

Question 4

Postural control depends on neurophysiological mechanism to:

Answer 4

• Maintain a stable position (balance) against gravity.
• Produce adjustments that anticipate voluntary movements in the desired
  direction: stabilize certain parts of the body to allow movement in others
  .
• React appropriately and proportionally to unexpected or possible imbalances.

Question 5

what are the two types of motor systems?

Answer 5

Postural Systems: Control tonic muscles for posture, originating in the brainstem and running medially in the spinal cord. They manage overall body posture and movement.

Movement Systems: Control phasic muscles for specific movements, especially in the hands and feet. They originate in the motor cortex and descend laterally in the spinal cord

Question 6

what are the 4 different types of motor pathways systems?

Answer 6

1)Cortico reticulospinal system
2)Vestibulospinal system
3)Cortico-rubrospinal system
4)Corticospinal systems