Myokymia and impaired muscular relaxation with continuous motor unit activity.
نویسندگان
چکیده
We have studied two cases of the syndrome of myokymia and impaired muscular relaxation with continuous motor unit activity. Both patients complained of muscle twitching, weakness, stiffness, and hyperhydrosis during their illness. Myokymia was present over the entire body in both. On repetitive testing of muscle strength each patient showed initial fatigue followed by increasing strength as he continued his efforts. Both patinets improved on phenytoin therapy at high blood levels. Nerve conduction velocities were decreased. Electromyograms showed continuous electrical activity at rest which persisted during sleep and spinal anaesthesia but was diminished by curare. Intravital staining with methylene blue in one case demonstrated sprouting and beading of motor nerve terminals with multiple innervation of muscle fibres. The neurophysiological and pathological findings in these two cases indicate an abnormality of peripheral nerve in this disorder.
منابع مشابه
Case Report: A 72 Years Old Man with Isaacs’ Syndrome: A Rare Entity with Different Outcomes
Neuromyotonia is a neuromuscular hyperexitability disorder characterized by muscle stiffness caused by continuous muscle fiber activity. It is an immune mediated disorder with elevated antibody level against presynaptic, voltage gated potassium channels, either as isolation or as a paraneoplastic process. Symptoms usually include muscle twitching during rest (myokymia), cramps, peudomyotonia (d...
متن کامل'Continuous muscle fibre activity' in six dogs with episodic myokymia, stiffness and collapse.
Continuous muscle fibre activity was observed in a crossbred dog, a Yorkshire terrier, a border collie and three Jack Russell terriers. The clinical signs consisted of episodes of generalised myokymia which developed into muscle stiffness and delayed muscle relaxation and generally led to the dogs collapsing into lateral recumbency. These episodes were preceded by intense facial rubbing in thre...
متن کاملPostirradiation localized cramp-fasciculation syndrome.
Radiation plexopathy produces numbness, weakness, and reflex changes.1 Excess motor unit activity (EMUA) after irradiation manifests as myokymia and neuromyotonia in affected muscles.2,3 A 65-year-old woman presented with a pulling sensation in the left axilla and intermittent depression of the left arm of 3 to 4 months duration. Ten months earlier she had completed chemotherapy and radiation t...
متن کاملAmyotrophic Lateral Sclerosis
Touch MEdical MEdia 53 Fasciculation, which is observed in various peripheral motor neuron disorders, is most frequently found in nonprogressive benign fasciculation syndrome (BFS). Patients with BFS never exhibit muscle atrophy or pathologic weakness and not all such patients visit hospitals; therefore, the prevalence and characteristics of BFS still need to be established. However, among the ...
متن کاملCardinal features of superior oblique myokymia: An infrared oculography study
Purpose Superior oblique myokymia (SOM) is a rare eye movement disorder characterized by unilateral oscillopsia and binocular diplopia. Our study aimed to better understand SOM using infrared oculography. Methods We examined and recorded five patients with SOM. Results Binocular infrared oculography showed that in primary gaze, all patients exhibited torsional oscillations, which worsened i...
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:
- Journal of neurology, neurosurgery, and psychiatry
دوره 42 6 شماره
صفحات -
تاریخ انتشار 1979