Term
| What operations are involved in voluntary movement and what areas do they involve? |
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Definition
1) Identification of the task:
- Posterior parietal cortex
2) Planning/ programming:
- Premotor areas:
a) Premotor cortex
b) Supplementary motor area
3) Execution:
- Primary motor cortex. |
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Term
| Where does the intention to move originate? |
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Definition
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Term
| What is the role of the premotor cortex? |
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Definition
| Involved in complex movements. |
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Term
| What is the role of the primary motor cortex? |
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Definition
| Produces simple movements. Involved in movement initiation. |
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Term
| How do neurones in the primary motor cortex affect direction and force? |
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Definition
| Single neurone dscharge controls muscle force. Population neuronal discharge controls movement direction. |
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Term
| Where does sensory input to the primary motor cortex come from? |
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Definition
| The primary somatic sensory cortex. |
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Term
| What control loops are involved in moderating muscle contraction? |
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Definition
| Spinal and cortical loops. |
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Term
| What is the role of the supplementary motor cortex? |
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Definition
| It is active in the performance or mental rehearsal of a complex movement. |
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Term
| What is the role of the premotor cortex? |
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Definition
| It controls axial and proximal limb muxcles in the initial phases of orienting the body and arm to a target. It is also involved in the visual steering/ guidance of a movement. |
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Term
| How can the motor areas of the cerebral cortex influence the spinal cord? |
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Definition
| Directly and through the brainstem descending pathways: rubrospinal and reticulospinal tracts. |
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