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12 Cards in this Set
- Front
- Back
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What does the CNS consist of? |
Cerebral hemispheres Brain stem Spinal cord |
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What does the PNS consist of? |
Peripheral nerves Neuromuscular JUnction Muscles Sensory nerves Cranial nerves |
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What does the Motor system consist of? |
Upper motor neuron Lower motor neuron |
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Give an example of a descending motor pathway where the upper motor neuron is found. |
Corticospinal tract |
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What is the pathway of the upper motor neuron? |
Cerebral cortex - white matter structures (corona radiata, internal capsule) - down brain stem - crosses in medulla - spinal cord - supplies ant. horn cells throughout spinal cord |
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What is the pathway for the lower motor neuron? |
Ant. horn cell - ventral horn - vental root - join dorsal root to form mixed spinal nerve - neuromuscular junction - muscle |
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What is the cervical cord's associated plexus? |
brachial plexus |
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What is the lumbosacral cord's associated plexus? |
Lumbosacral plexus |
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Where do the corticospinal axons terminate? |
On the anterior horn cells |
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Where are the anterior horn cells? |
Ventral grey matter |
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What is meant by the term plegia? |
Very weak, can't pick up leg |
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What is meant by the term paresis? |
Moderately weak, can pick up leg |
