For other uses, see Optic Nerve. The optic nerve, also known as cranial nerve II, is a paired nerve that transmits visual information from the retina to the brain. The optic nerve is derived from optic stalks during the seventh week of development and is composed of retinal ganglion cell axons and glial cells.
Causes. Sodium plays a key role in your body. It helps maintain normal blood pressure, supports the work of your nerves and muscles, and regulates your body's fluid balance. A normal sodium level is between 135 and 145 milliequivalents per liter (mEq/L) of sodium.Hyponatremia occurs when the sodium in your blood falls below 135 mEq/L. Many possible conditions and lifestyle factors can lead to hyponatremia, including: 1  Certain medications.t helps maintain normal blood pressure, supports the work of your nerves and muscles, and regulates your body's fluid balance. A normal sodium level is between 135 and 145 milliequivalents per liter (mEq/L) of sodium.
The âDietary Guidelines for Americans 2010â addresses sodium intake in detail. The average daily sodium intake for Americans is 3,400 milligrams per day, an excessive amount that raises blood pressure and poses health risks.In general, Americans should limit daily sodium consumption to 2,300 milligrams, but this is an upper safe limit, not a recommended daily allowance.he average daily sodium intake for Americans is 3,400 milligrams per day, an excessive amount that raises blood pressure and poses health risks.