Abstract
The optic nerves of some regenerative and nonregenerative animals were compared using electron microscopy, after hypertonic perfusion. Optic axons and glial cell processes separated more readily in regenerative animals, creating large extracellular spaces. In mammals, cell processes remained in close proximity. These findings may indicate lesser adhesion between cell processes in optic nerves of regenerative animals, a characteristic that could allow “potential” space for axon regrowth after nerve injury.
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