a year). The other main pattern of cluster headache is termed “chronic” (and is also known as chronic migrainous neuralgia). It may come out of the blue or emerge several years after an episodic pattern. It is characterized by the absence of sustained periods of remission. The episodic and acute forms of cluster headache may transform into the other, so it is clear that they are merely different-appearing patterns of one and the same disease.
On the other hand, cluster headache looks different and distinct from migraine-for example, propranolol is effective for migraine but not cluster headache while lithium benefits cluster headache syndrome but not migraine-although the mechanisms underlying cluster headache and migraine may have a degree of commonality. Cluster headache has gone by a bevy of other names including sphenopalatine neuralgia, ciliary neuralgia, vidian neuralgia, erythroprosopalgia and histamine cephalalgia.
Any of several weedy composite herbs that produce a pollen to which many people are allergic. Of all allergy sufferers in the US, 75 percent are allergic to ragweed.
An abnormal lung sound that can be heard through a stethoscope. Rales may be sibilant (whistling), dry (crackling), or wet (sloshy), depending on the amount and density of fluid refluxing back and forth in the air passages.
- Ramsay Hunt syndrome
Occupational compression neuritis of the deep palmar branch of the ulnar nerve.
In anatomy, a branch, such as a branch of a blood vessel or nerve. For example, the ramus acetabularis arteriae circumflexae femoris medialis is the branch of an artery that goes to the socket of the hip joint. The plural of ramus is rami.
- Ramus of the mandible
One of the two prominent, projecting back parts of the horseshoe-shaped lower jaw bone.