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.
Research shows that Americans consume on average about 3,300 milligrams (mg) of sodium every day. The 2010 Dietary Guidelines for Americans recommends a reduction of sodium intake to less than 2,300 mg daily.And those age 51 and older, and people of any age who are African-American or have high blood pressure, diabetes or chronic kidney disease should further reduce sodium intake to 1,500 mg daily.esearch shows that Americans consume on average about 3,300 milligrams (mg) of sodium every day. The 2010 Dietary Guidelines for Americans recommends a reduction of sodium intake to less than 2,300 mg daily.