A lumbar sympathetic nerve block is a special test to help your doctor find the cause of your symptoms. During the test, an anesthetic (numbing) medication is injected near your spine. This âblocksâ the sympathetic nerves in that region.
Lutein is an antioxidant carotenoid a pigmented nutrient that is responsible for the yellow colors of fruits and vegetables and is present in the highest quantities in dark, leafy green vegetables. You're born with a certain amount of lutein in your eye, but your body doesn't reproduce it.
Lutein may also play an important role in brain health, and may help prevent cognitive decline. Those with higher levels of lutein in middle-age had more youthful neural responses than those with lower levels; Other nutrients that are important for brain health and cognition include animal-based omega-3 fats, vitamin D and B vitamins.