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The spinal cord has two major types of tissue. The gray matter contains the nerve cell bodies and all of the many thousands of connections between nerves. The white matter is more like a freeway composed of nerve axon fibers traveling long distances from the spine to the brain. The ventral root carries motor axon fibers from cells in the gray matter out to the muscles. Incoming sensory signals pass through a connection - or synapse in the dorsal root ganglion, and then follow the dorsal root into the grey matter. |
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