Motor Control by the CNS

Question 1

What is the rubrospinal system?

Answer 1

Motorcortex through red nucleus

feeds to the spinal CPGs

Question 2

What is the cortical neurone

Answer 2

“Manager” of multiple spinal cords neurones

control of movements, not of individual muscles

Question 3

Where is the corticospinal tracts

Answer 3

Come from the motor tracts

Cross over in the medulla oblongata

Question 4

What is the basal ganglia

Answer 4

Groups of neurones where all motor fibres are passed between

Question 5

Role of basal ganglia

Answer 5

Release and supression of movement

Question 6

What is the putamen circuit

Answer 6

Loop from the cerebral cortex and back via the putamen - GP - subthalamic nucleii - SN, thalamus

Question 7

What are problems with the putamen circuit

Answer 7

Athetosis- slow involuntary movement
Ballismus- ballistic movement
Chorea- dance like movements

Question 8

What is the cuadate circuit?

Answer 8

Cognitive control of movement

Question 9

What is the caudate circuit common to both?

Answer 9

Excitatory dopaminergic pathway from SN to straitum