In a selective nerve root block, a small needle is placed in the foramen alongside the nerve root and the medication is injected. When the nerves in the foramina are irritated or pinched by a bulging disk, narrowed ânerve canalâ or bone spur, the resulting inflammation can cause pain, numbness, or tingling.
The corpus luteum (Latin for yellow body; plural corpora lutea) is a temporary endocrine structure in female mammals that is involved in the production of relatively high levels of progesterone and moderate levels of estradiol and inhibin A.
The corpus luteum secretes the hormones estrogen and progesterone, preparing the body for the possibility of conception. If conception does not take place, the corpus luteum diminishes, leading to a drop in progesterone and estrogen. This drop leads to menstruation, and the reproductive cycle starts over again.