Section 6
Spinal Nerves
Book
Version 29
By Boundless
By Boundless
Boundless Anatomy and Physiology
Physiology
by Boundless
6 concepts
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Overview of the Spinal Nerves
Spinal nerves, a part of the peripheral nervous system (PNS), are mixed nerves that send motor, sensory, and autonomic signals between the CNS and the body.
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Branches of Spinal Nerves
The spinal nerves branch into the dorsal ramus, ventral ramus, the meningeal branches, and the rami communicantes.
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Plexuses
A nerve plexus is a network of intersecting nerves that serve the same part of the body.
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Intercostal Nerves
The anterior divisions of the thoracic spinal nerves (T1–T11) are called the intercostal nerves.
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Dermatomes
A dermatome is an area of skin that is supplied by a single spinal nerve, and a myotome is a group of muscles that a single spinal nerve root innervates.
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Function and Physiology of the Spinal Nerves
Spinal nerves connect the brain and spinal cord to the limbs and organs of the body.