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.
Luteinizing hormone (LH), is also known as lutropin or lutrophin and is a hormone produced by gonadotroph cells in the pituitary gland. In females an increase in LH triggers ovulation and the development of the corpus luteum.