(From the same,) also called ischias, sciatica, coxa dolores. Aretaeus ranks this disorder as a species of gout,"which comes," he ob serves,"on the hind part of the thigh, the ham, or the tibia; at other times attacking the acetabulum of the os femoris, and then the buttock and loins, seeming to be any thing rather than a sciatica." Dr. Cullen ranks it as a synonym with rheumatismus.

The sciatica is sometimes seated in the tendinous expansion which covers the muscles of the thigh, occasionally, it is supposed, in the coat of the sciatic nerve. In the last case the pain is more acute and violent, attended with a numbness; a symptom easily accounted for. Its most common seat, however, is in the muscles, or in the capsular ligament; and it is then either rheumatic or gouty.

The two former species cannot be distinguished; nor do they admit of any peculiar treatment. In general, the disease must be treated as a rheumatism of the chronic kind, to which we refer. (See Rheumatis-mvs.) There are, however, some modes of relief supposed to be peculiarly useful in sciatica, which we must mention in this place. That recommended by Fo-thergill, consists in giving a grain of calomel every night, washed down with a draught containing twenty-five drops of tincture of opium, and thirty of antimonial wine. If not relieved after ten doses, the quantity of calomel is to be increased to two grains every alternate night. Other authors have recommended the ethereal spirit of turpentine, which is a very efficacious medicine, if united with honey, by gently melting over a slow fire; and in this way the dose may be increased to thirty or forty drops. We have found the combination of mercury and antimony, in the form of Plum-mer's pill, with the Lisbon diet drink, frequently succeed when every other medicine has failed; but these remedies we shall again mention when speaking of rheumatism.

The ischias nervosa of Cotunnio is supposed by this author to be owing to a fluid distending the sheaths of the nerves, and irritating the nervous fibres. The peculiar treatment suggested by this opinion is the application of a blister immediately under the knee joint, on the inside of the leg, as well as to the hip; as near the knee the blister affects more particularly the nerve in the neighbourhood of that part. There is little doubt of the existence of a sciatica not attended with any striking inflammatory symptoms; but of the peculiar cause assigned by Cotunnio we can find little support from observation or dissection. See Culleni Nosologia Methodica.

Richter speaks of some cases of the ischias nervosa being successfully treated by blisters often repeated, and sudorifics. In one instance, the blisters were applied on different parts where any pains were felt in succession: the sudorifics were first crude antimony, the stipites dulcamara in pills, and the warm bath for six days; on the seventh, a powder composed of camphor, ipecacuanha, and opium, was given, preceded by a tepid bath; the bath was continued till the foot became cede-matous, and then left off; the other remedies were still pursued, which, in about six weeks, completed the cure. The symptoms were, pains in his arms, shoulders, and back, which settled about the hip joint, continued fixed, and increasing till the patient could not walk; the whole limb became shorter; the pains extended from the hip joint down to the foot; he felt as if ants were running about in the foot; and was totally unable to move the limb to either side, which, in other respects, was warm, and properly nourished. A lady and a young man were cured by the application of burning cones and blisters; on which he remarks, that from this method nothing is to be expected unless in such kinds of lameness as proceed from the metastasis of any stimulating matter, where the lameness is accompanied with pains in the suffering limb, and chiefly the hip joint; and this morbific matter he thinks rheumatic or gouty; though, in some cases, he had reason to believe it was scrofulous. See his Medical and Surgical Observations, p. 169.

These cases,however,by no means support Cotunnio's idea of the cause. They are instances only of chronic rheumatism, though pains in the hip joint are, as he remarks, sometimes scrofulous, and occasionally,we think, of a cancerous nature.