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Questions and Answers
What is the immediate outcome after the spinal nerve trunk leaves the intervertebral foramen?
What is the immediate outcome after the spinal nerve trunk leaves the intervertebral foramen?
- It forms the mixed spinal nerve trunk
- It divides into two primary rami (anterior and posterior) (correct)
- It joins with the corresponding spinal nerve trunk from the adjacent level
- It branches into ventral and dorsal roots
What is the main characteristic of the spinal nerve trunk?
What is the main characteristic of the spinal nerve trunk?
- It is mainly involved in autonomic functions
- It directly connects to the brainstem
- It is very short and immediately divides into two primary rami (correct)
- It contains only sensory nerves
What happens at the corresponding intervertebral foramen?
What happens at the corresponding intervertebral foramen?
- The spinal nerve trunk merges with the spinal cord
- The ventral and dorsal roots unite to form the spinal nerve trunk (correct)
- The ventral and dorsal roots separate to form individual nerves
- The spinal nerve trunk divides into two primary rami
What type of nerves do the primary rami supply?
What type of nerves do the primary rami supply?
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In the cervical region, which vertebral spine is opposite to the C6 segment?
In the cervical region, which vertebral spine is opposite to the C6 segment?
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Which vertebrae are opposite to the T11 spine?
Which vertebrae are opposite to the T11 spine?
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What results in the gradual lengthening of the lumbar and sacral nerve roots?
What results in the gradual lengthening of the lumbar and sacral nerve roots?
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Where does the C8 nerve emerge in relation to the vertebra?
Where does the C8 nerve emerge in relation to the vertebra?
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Study Notes
Spinal Nerve Trunk
- After leaving the intervertebral foramen, the spinal nerve trunk immediately divides into dorsal and ventral rami.
- The main characteristic of the spinal nerve trunk is that it is a mixed nerve, containing both sensory and motor fibers.
Intervertebral Foramen
- At the corresponding intervertebral foramen, the spinal nerve trunk exits the vertebral column.
Primary Rami
- The primary rami supply the dorsal and ventral rami.
Cervical Region
- In the cervical region, the C7 vertebra is opposite to the C6 segment.
Thoracic Region
- The T11 spine is opposite to the T11 and T12 vertebrae.
Lumbar and Sacral Nerve Roots
- The gradual lengthening of the lumbar and sacral nerve roots results from the vertebral column growing faster than the spinal cord.
- The C8 nerve emerges below the C7 vertebra in relation to the vertebra.
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