Zulma M Hernández

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Neuromyelitis optica is an autoimmune disorder characterized by optic neuritis, transverse myelitis, and aquaporin-4 autoantibodies. The term "neuromyelitis optica spectrum disorder" refers neuromyelitis optica features occurring in association with other systemic rheumatologic conditions. We present a case of a 51-year-old woman with long-standing systemic(More)
In the presence of calcium, Ba2+ ions, at concentrations as low as 1-2 mM, block the action potentials (a.p.'s) elicited by the electrical stimulation of the primary spines of Diadema antillarum. Lower concentrations of barium (0.1 mM) potentiate the a.p.'s recorded from spines equilibrated with Ca-Free artificial sea water (ASW). Exposure of the spines to(More)
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