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"There are few topics of more utility for the physician to study, in our opinion, than that of mono-plegias and mono-spasms of hemiplegias and hemi-spasms in their genesis, mutual relations, and diagnostic significance," says Seguin in his article on the general semeiology of nervous diseases, in the fifth volume of Pepper's "System of Medicine." A superficial examination of our standard text-books, will show the paucity of information regarding hyper-kinesis, except in so far as the symptom relates to the diagnosis of paralysis agitans, chorea or sclerosis. A myoclonus limited to a single muscle, is not uncommon, and is usually observed in the ciliary, orbicularis palpebrarum, and masseter muscles. The sterno-cleido-mastoid may also be affected with a clonic spasm, giving rise to one of the most painful forms of wry neck. A case such as is here detailed of a clonic, rythmical spasm of a single muscle lasting nearly eight
MOVER HN. CLONIC RYTHMICAL SPASM OF THE PRONATOR RADII TERES.Read in the Section on Practice of Medicine, Materia Medica and Therapeutics, at the Thirty-Eighth Annual Meeting of the American Medical Association.. JAMA. 1887;IX(9):268–269. doi:10.1001/jama.1887.02400080012002b
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