Stephen A. Barron

Learn More
A patient with continuous muscle fiber activity is described. From our search of the literature, we believe this is the oldest patient with a reported case of this disorder, and the symptoms and treatment varied from previously reported cases in these respects: symptoms remained confined to the lower extremities after 18 months had elapsed, there was no(More)
Defective pursuit eye movements were recorded by electrooculography (EOG) in 11 of 18 patients (61%) with amyotrophic lateral sclerosis. Pursuit defects consisted of a breakdown of smooth tracking into saccadic motions that were grossly in excess (frequencies and amplitudes) of saccadic interruptions of pursuit in normal subjects. In nine patients,(More)
One hundred thirty-five normal volunteers were examined by computerized tomography (CT) and their ventricular size was measured by planimetry. A pattern of change in ventricular size from the first through the ninth decades was discerned and quantified. A gradually progressive increase in ventricular size from the first through sixth decades was followed by(More)
In order to study the possible etiologic role of lead in human motor neuron disease we produced chronic lead intoxication in the chicken by daily administration of lead acetate. Control animals received sodium acetate. During life, periodic measurements were made of motor function, motor nerve conduction velocity and response amplitude. After sacrifice,(More)
The effects of early ischemia were studied in the anterior tibial muscle of Sprague-Dawley rats after 2--24 hr of tourniquet compression at the thigh. Ragged-red fibers, moth-eaten fibers, cores and targets were seen in tissue examined by enzyme histochemistry and electron microscopy. Giant mitochondria, abnormalities of cristal arrangement, crystalloids,(More)
In one hundred subjects with diabetes mellitus assessed by the techniques of power spectral analysis of heart rate variability and heart rate variability during deep breathing, parasympathetic (vagal) cardiac denervation was shown to occur approximately twice as commonly as parasympathetic pupillary denervation measured by the maximal velocity of pupillary(More)
Six patients with polymyositis initially complained of a single, localized, painful mass involving an extremity. The mass enlarged during the course of a two- to six-week period. Biopsy of the lesion revealed myopathic changes with inflammation, and the diagnosis of benign inflammatory pseudotumor was considered. The mass regressed, but during the next(More)
The results of evaluation of the autonomic nervous system of a patient with amyotrophic lateral sclerosis are presented. As previously reported, parasympathetic function and sympathetic adrenergic function were normal as assessed by cardiovascular reflexes. However, a disturbance in sympathetic cholinergic function as measured by the sympathetic skin(More)
In a patient with congenital hypertrophy of the right leg, there developed progressive enlargement of the extremity and inflammatory pseudotumor and electrical myotonia within the enlarged muscle. In three other reported cases, progressive muscle enlargement was associated with abnormal spontaneous electrical and mechanical activity of muscle. In all four(More)