Navigable waters of the United States are those waters that are subject to the ebb and flow of the tide and/or are presently used, or have been used in the past, or may be susceptible for use to transport interstate or foreign commerce.
The Signs & Symptoms of Friedreich's Ataxia are: 1  loss of coordination (ataxia) in the arms and legs. 2  fatigue - energy deprivation and muscle loss.  vision impairment, hearing loss, and slurred speech.
What research is being done? Friedreich's ataxia is caused by a mutation in the protein frataxin, which is involved in the function of mitochondriaâthe energy producing âpower plantsâ of the cell. Frataxin controls important steps in mitochondrial iron metabolism and overall cell iron stability.