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Describe the components, connective tissue coverings, and branching of a spinal nerve.
Describe the components, connective tissue coverings, and branching of a spinal nerve.
Spinal nerves are parallel bundles of axons and their associated neuroglia cells wrapped in several layers of connective tissue. They branch into dorsal and ventral rami.
Describe the clinical significance of dermatomes.
Describe the clinical significance of dermatomes.
Dermatomes are specific areas of the skin that are innervated by a single spinal nerve. They are clinically significant for diagnosing neurological conditions and determining the location of nerve damage or dysfunction.
Define plexus, and identify the distribution of nerves of the cervical, brachial, lumbar, and sacral plexuses.
Define plexus, and identify the distribution of nerves of the cervical, brachial, lumbar, and sacral plexuses.
A plexus is a network of intersecting spinal nerves. The distribution of nerves in the plexuses are: Cervical plexus: C1-C5, Brachial plexus: C5-T1, Lumbar plexus: L1-L4, Sacral plexus: L4-S4
How many pairs of spinal nerves are associated with the spinal cord?
How many pairs of spinal nerves are associated with the spinal cord?
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Where does the spinal cord end, and what is the term for the arrangement of nerves beyond this point?
Where does the spinal cord end, and what is the term for the arrangement of nerves beyond this point?
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