Definition of ablative. 1  1 : of or relating to ablation. 2  2 : tending to ablate ablative material on a nose cone.
Occipital Nerve Block. An occipital nerve block is an injection that numbs the nerves at the back of the head. There are four nerves on each side of the scalp. Occipital nerves allow us to feel sensations in the scalp. An occipital nerve block is done to decrease headache pain, caused by migraine, injury (concussion), muscle tightness or occipital neuralgia. The medicine used is either a local anesthetic or a combination of a local anesthetic and a steroid. The medicine is placed around the occipital nerves, which are located just beneath the skin, in the back of the head. The occipital block is usually done in the office.
Deep to the vessels and nerves in the superficial fascia of the scalp is a thin fibromuscular sheet known as the occipitofrontalis muscle. It is one of the muscles of facial expression innervated by cranial nerve (CN) VII (aka facial nerve). The portion over the forehead is called the frontalis muscle (frontal belly of the occipitofrontalis), and that over the back of the head is called the occipitalis muscle (occipital belly of the occipitofrontalis).