Calcification of axons in experimental spinal cord trauma

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Abstract
Selective discrete intraaxoplasmic deposits of hydroxyapatite crystallites were observed in adult male rats subjected to experimental trauma to the lumbosacral spinal cord. Although previously unreported in spinal cord trauma, the presence of these deposits in minimally altered axons and during the early posttrauma period suggests that such selective calcification may be of more than secondary significance. In view of the current emphasis on cytotoxicity of calcium, especially in relation to axonal degeneration, an evaluation of the role of calcium in augmenting traumatic spinal cord necrosis is warranted.