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From what I understand, only the oligodendrocytes are affected in multiple sclerosis, and they are attacked by T cells which cross the blood-brain barrier. This leads me to two questions:

  1. How is the blood-brain barrier affected in MS that allows T lymphocytes to cross the barrier?
  2. Why do the T lymphocytes attack the oligodendrocytes? And when they do, what is the mechanism for de-myelination?

Thank you in advance!

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closed as off-topic by AliceD, Josh de Leeuw, Christian Hummeluhr, Krysta, Arnon Weinberg Mar 26 '15 at 16:51

  • This question does not appear to be about psychology or neuroscience within the scope defined in the help center.
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