Progressive Ataxia and Downbeat Nystagmus in the Adult.

Published on May 17, 2021in JAMA Neurology13.608
· DOI :10.1001/JAMANEUROL.2021.1205
Alejandra Collía Fernández1
Estimated H-index: 1
,
Begoña Huete Antón , Juan Carlos Garcia-Monco19
Estimated H-index: 19
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Abstract
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The above article was published online with inverted given and family names. The correct presentation has been corrected above.
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Magnesium is the fourth most abundant cation in the body and the second most abundant intracellular cation. It plays an important role in different organ systems at the cellular and enzymatic levels. Despite its importance, it still has not received the needed attention either in the medical literature or in clinical practice in comparison to other electrolytes like sodium, potassium, and calcium. Hypomagnesemia can lead to many clinical manifestations with some being life-threatening. The repor...
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Introduction: Hypomagnesemia has been associated with various neurological symptoms including ataxia. Reversible changes in cerebellar function have been described due to hypertensive changes, eclampsia, and immunosuppressive therapy in the context of posterior reversible encephalopathy syndrome. In this report we document isolated, reversible cerebellar findings with the corresponding neuroimaging correlates associated with critically low magnesium levels. Case Report: A 72-year-old male with m...
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Magnesium deficiency and hypomagnesemia remain quite prevalent, particularly in patients in intensive care units, and may have important clinical consequences. Magnesium should be measured directly in clinical circumstances in which a risk for magnesium deficiency exists and appropriately corrected when found. This commentary reviews the current knowledge of magnesium homeostasis and the risk factors and clinical consequences of magnesium deficiency and outlines approaches to therapy.
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• Two patients with neurological signs of magnesium depletion complained of oscillopsia and manifested downbeat nystagmus. Serum magnesium levels measured less than 1.0 mg/dL. Hypomagnesemia resulted from debilitating intestinal disease in both patients and apparently was aggravated in one case by failure to add magnesium sulfate to the patient's regimen for total parenteral nutrition. Neither patient had any of the neurological conditions reported with downbeat nystagmus. Thus, downbeat nystagm...
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