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"2.4. Central canal of the spinal cord
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"3.3. Effects of spinal cord injury on CNS neurogenic processes/niches"
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"Parenchymal NG2+ OPC are also activated and lead to oligodendrocyte differentiation. Newly produced oligodendrocytes participate in attempts to remyelinate injured axons [114]. Unfortunately, neuronal production has not yet been reported, and may be explained by the host of powerful pro-glial cues that emanate from the spinal cord [114, 119, 121, 299]; as a result functional recovery post-injury is modest at best."

http://www.intechopen.com/books/adul...matory-brain-a

Paolo