Chapter 12 (1)
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What part of the superficial anatomy of the spinal cord supplies nerves to shoulder and upper limbs?
What part of the superficial anatomy of the spinal cord supplies nerves to the pelvis and lower limbs?
What part of the superficial anatomy of the spinal cord is the tapered terminal end inferior to the lumbar enlargement?
What part of the superficial anatomy of the spinal cord is inferiorly extending dorsal and ventral roots which resemble a horse's tail?
What part of the superficial anatomy of the spinal cord is a slender thread of connective tissue attaching conus medullaris to coccyx and provides longitudinal support to the spinal cord?
How many pairs of spinal nerves are there?
How are cervical nerves identified and how many are there?
- From vertebrae immediately inferior.
How do you identify thoracic nerves?
From the vertebrae immediately superior.
Describe the posterior median sulcus.
Shallow longitudinal groove on posterior surface.
Describe the anterior median fissure.
Deep groove along anterior (ventral) surface.
Describe the dorsal root.
Contains axons of neurons whose cel bodies are in dorsal root ganglion.
Describe the dorsal root ganglion.
Contains sensory neurons cell bodies. These are found at each side of the spinal cord.
Describe white matter.
- Contains large numbers of mostly myelinated and some unmyelinated axons.
Describe gray matter.
- Surrounds central canal.
- Forms butterfly or H-shape.
- Dominated by cell bodies of neurons, neuroglia, and unmyelinated axons.
Describe the ventral root.
Contains axons of motor neurons extending into periphery to contral somatic and visceral effectors.
Describe the spinal nerve.
- Contains axons of both sensory and motor neurons.
- Sensory enter CNS through dorsal root.
- Motor exit through ventral root.
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