Context and Causes of the Great Migration. After the post-Civil War Reconstruction period ended in 1876, white supremacy was largely restored across the South, and the segregationist policies known as Jim Crow soon became the law of the land.
Most cases of nerve damage from diabetes can be reversed by good control of diabetes, but sometimes the damage is permanent. For example once person goes blind from diabetes, he will never get his vision back. However, impotence is often reversible with good control of diabetes.
Blood sugar : In people with diabetes, coma can occur when blood sugar levels stay very high. That's a condition known as hyperglycemia. Hypoglycemia, or blood sugar that's too low, can also lead to a coma. This type of coma is usually reversible once the blood sugar is corrected. Oxygen deprivation: Oxygen is essential for brain function. Cardiac arrest causes a sudden cutoff of blood flow and oxygen to the brain, called hypoxia or anoxia.