Chap 9

Question 1

What are the 4 central regions of movement ?

Answer 1

1. Broadmans area 5 and 7
2. Prefrontal cortex
3. Premotor cortex
4. Primary motor cortex

Question 2

Describe the basic sequence of movement production

Answer 2

1. Broadmans area of the parietal cortex integrates sensory stimuli
2. The prefrontal cortex plans movement
3. The premotor cortex organizes movement sequences
4. The motor cortex produces elementary movements

Question 3

What are the 3 principles of motor system function

Answer 3

1. Movement sequence: complex movements are done sequentially, when one is performed another is being set up
2. Hierarchy: Different complexities of movements are produced in different brain regions
3. Parallel processing: one system may produce automatic movements while another system programs adjustments

Question 4

What is the movement lexicon

Answer 4

Pre-set primal movements that exist within our motor systems, if damage occurs to the parietal-motor system, these coordinated movements will be impaired not simply our muscles

Question 5

What is the function of the globes pallidus of the basal ganglia

Answer 5

Inhibits or allows the thalamus to produce movement therefore acting as a control center (volume control theory)

Question 6

What is the role of the cerebellum in movement?

Answer 6

Responsible for the timing and accuracy of our movements

Question 7

What are the 2 spinal-cord pathways ?

Answer 7

1. Corticobulbar: Projections are sent to the brain stem
   - responsible for facial movements
2. Corticospinal: projections are sent to the spinal cord
   - responsible for limb, digit and body movements