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To the Editor.—
In the April edition of the Archives (18:378, 1968), Dr. P. W. Carmel describes sympathetic deficits (ptosis, miosis, hemianhydrosis) following "thalamotomy." From his description and figures it is obvious that the lesions producing these symptoms were not located in the thalamus but in the prerubral field. In several papers the undersigned and his associates called attention to the fact that hypothalamofugal fibers pass through this area and they described numerous vegetative effects on its stimulation preceding campotomy (lesions of Forel's field H) in patients with extrapyramidal disorders: changes of the pupil, of the heart rate and EKG, vasomotor reactions, sometimes appearance of a galvanic skin reaction, general perspiration, vomiting and micturition (J Neurosurg20: 871, 1963; Electroenceph Clin Neurophysiol16:537, 1964; O. Foerster Memorial Lecture, Acta Neurochir13:292, 1965). Dr. Carmel's observation of sympathetic deficits are a valuable confirmation and extension of our findings, but
SPIEGEL EA. SYMPATHETIC DEFICITS. Arch Neurol. 1968;19(2):236. doi:10.1001/archneur.1968.00480020122016