Involuntary painful muscle contractions in Satoyoshi syndrome: a surface electromyographic study.
نویسندگان
چکیده
We report a child with Satoyoshi syndrome manifested by involuntary painful muscle contractions and alopecia. Although an autoimmune origin of Satoyoshi syndrome seems likely, its exact etiology remains as yet unknown, as is the origin of the involuntary contractions. To gain a better understanding of the electrophysiological characteristics of the involuntary contractions, we performed a surface electromyographic (EMG) study. We investigated muscle contractions in the legs using two noninvasive techniques: high-density surface EMG (HD-sEMG) recordings on one muscle, and polymyographic surface EMG (sEMG) recordings on various muscles. During the involuntary contractions, HD-sEMG showed a fourfold increase in amplitude compared to maximal voluntary contractions. These high potentials were widely distributed across the whole muscle and showed a pronounced oscillatory behavior with a frequency around 45 Hz. Polymyographic sEMG revealed that the involuntary contractions often occur simultaneously in various muscles or showed a switch of activity from one muscle to another. These findings point to hyperactivity or a disinhibition at the alpha motor neuron level, originating probably at that level, although a central origin cannot be excluded. (c) 2006 Movement Disorder Society.
منابع مشابه
تأثیر خستگی بر الگوی فعالیت الکترومایوگرافی و هم انقباضی عضلات اندام تحتانی طی دویدن
Background: Muscle fatigue can change the muscle activation pattern during running and causes some disorders in running biomechanics. The aim of present study was to determine the effect of muscle fatigue on electromyographic activation pattern and co-contractions of lower extremity muscles during running. Methods: Fourteen males (age: 23.76±2.14 years, weight: 78.45±2.54 kg, hei...
متن کاملA case of involuntary spasm movements in amputation stump
Painful jumping stump is characterized by persistent choreiform or myoclonic involuntary movements and severe neuropathic pain in the stump of a limb following amputation. This syndrome is also defined as„ trepidation du moignon‟, convulsive movements of the stump” or“jumpy stump”.The pathophysiology and etiology have not yet been clearly defined. We describe a seventy four year old man, who ha...
متن کاملSatoyoshi syndrome.
Satoyoshi syndrome (Komuragaeri disease) is a rare disorder of presumed autoimmune etiology, characterized by painful muscle spasms, alopecia, diarrhea, endocrinopathy with amenorrhoea and secondary skeletal abnormalities. Most of the previous reports are of the Japanese people. We report the first case from India.
متن کاملTeaching video neuroimages: involuntary muscle contractions in Hoffman syndrome.
Caitlin Loomis, MD Shawn J. Bird, MD Joshua M. Levine, MD Hoffman syndrome is a rare constellation of features that occurs in severely hypothyroid adults. It is characterized by muscle hypertrophy, weakness, stiffness, and slowness of movement with or without muscle cramps.1 Elevation of creatine kinase is common, but does not correlate with disease severity.2 A 50-year-old man from Ghana prese...
متن کاملAdult-onset Satoyoshi syndrome with prominent laterality of clinical features.
We herein report the case of a patient with adult-onset Satoyoshi syndrome. Alopecia was detected on the patient's head, left leg and abdomen, with pigmentation on the left thigh and abdomen. Painful muscle spasms were also noted in the abdomen and left upper and lower extremities, and a sensory disturbance was present in the left thigh. A skin biopsy of this field showed lymphocyte infiltratio...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Movement disorders : official journal of the Movement Disorder Society
دوره 21 11 شماره
صفحات -
تاریخ انتشار 2006