41例发作性运动诱发性运动障碍临床与神经电生理分析

目的　观察发作性运动诱发性运动障碍 (PKMD)的临床特征及与癫的关系。方法　详细观察 4 1例PKMD的临床特征 ,影像学和脑电图改变。结果　 4 1例均由运动诱发 ,呈发作性运动诱发性舞蹈手足徐动症 30例 ,发作性运动诱发性肌张力障碍 11例 ,发作时意识清楚 ,影像学有异常者 6例 ,脑电图有样放电者 12例 ,其中 2例发作时有样放电 ,脑体感诱发电位半数以上病例有定位侧半球改变。对抗药有良效。结论　本症障碍的部位可能在感觉刺激的传入通路与发作症状的传出通路之间的反射中枢。具有某些癫性质 ,推测与癫发作可能有某些共同的生物学基础     

Paroxysmal Kinesigenic Choreoathetosis with Abnormal Electroencephalogram During Attacks

An 18-year-old man with paroxysmal kinesigenic choreoathetosis (PKC) showed rhythmic electroencephalographic (EEG) discharges of 5-Hz spikes over the entire scalp during episodes. The EEG findings in this case suggest that PKC may have an epileptogenic basis.     

Paroxysmal dyskinesis and epilepsy

Based on the available literature, we outline the classification criteria of paroxysmal involuntary movements with instant onset and termination. Four types of those movements are currently distinguished: dystonic Mount-Reback paroxysmal choreoathetosis, kinesigenic paroxysmal choreoathetosis, exercise-induced paroxysmal dystonia, and hypnogenic paroxysmal dystonia. We present the clinical characteristics of those entities, as well as diagnostic and therapeutic aspects. An association with epilepsy is emphasised, which seems to predominantly apply to hypnogenic dystonia and kinesigenic paroxysmal choreoathetosis.     

Effective treatment with oxcarbazepine in paroxysmal kinesigenic choreoathetosis

Paroxysmal kinesigenic choreoathetosis is often responsive to anticonvulsants such as carbamazepine and phenytoin. We report a boy with paroxysmal kinesigenic choreoathetosis, which is dramatically relieved by oxcarbazepine even after unsatisfactory treatment with carbamazepine and other medications.     

Focal paroxysmal kinesigenic choreoathetosis

Three cases of paroxysmal kinesigenic choreoathetosis are described in whom unilateral attacks were focally induced, together with a case in whom bilateral attacks only occured. Treatment with phenytoin was effective in all cases. The aspects of the literature relating to focal and generalised attacks in paroxysmal kinesigenic choreoathetosis are reviewed.     

Familial paroxysmal dystonic choreoathetosis and its differentiation from related syndromes

Four generations of a family are described in which 7 of 8 affected members suffered from prolonged dystonic seizures; the eighth member's attacks were those of paroxysmal choreoathetosis. The attacks lasted up to 4 hours, were precipitated by alcohol, emotion, or fatigue, and responded poorly to phenytoin and barbiturates but were controlled by clonazepam. Autopsy on an affected child who died a "crib death" at the age of 2 years disclosed no major abnormality of the brain. This family appears to have the same condition as that described by Mount and Reback in 1940, Forssman in 1961, and Richards and Barnett in 1968, which the last authors termed paroxysmal dystonic choreoathetosis to distinguish it from the more common movement-induced (kinesigenic) form of the disorder. Analysis of reports of 100 cases of paroxysmal kinesigenic choreoathetosis shows that the attacks last less than 5 minutes, are precipitated by sudden movement or startle, and usually respond well to phenytoin or barbiturates. A clinical classification is presented in which the kinesigenic form is divided into a familial group (72% of cases) and a sporadic group (28% of cases) and contrasted with paroxysmal dystonic choreoathetosis. One family with an intermediate form, in which dystonic choreoathetosis was provoked by continued exertion and lasted for up to 30 minutes, is also reported.     

发作性运动诱发性运动障碍36例临床及影像学研究

目的观察发作性运动诱发性运动障碍(PKD)的临床特征及影像学改变,探讨其发病机制。方法详细观察36例PKD的临床特征,影像学和脑电图改变,并综合文献,简述其发病机制及遗传规律。结果36例均由运动诱发,呈发作性运动诱发性肌张力障碍30例,发作性运动诱发性舞蹈手足徐动症6例,发作时意识清楚,影像学有异常者4例,脑电图1例放电。抗癫痫药疗效好。结论发作性运动障碍是一种少见的运动障碍疾病,临床表现类似癫痫,可能是一种离子通道病,与基底节区功能障碍关系密切,大部分抗癫痫药物治疗有效。     

Kinesigenic attacks with ictal electroencephalographic abnormalities

We report on a 14-year 5-month-old male who had attacks similar to those of paroxysmal kinesigenic choreoathetosis. The attacks were elicited exclusively by sudden movements. On several occasions, these attacks were immediately followed by loss of consciousness or a seizure. Ictal electroencephalograms of his attacks without loss of consciousness or a seizure indicated 1.5-3.0 Hz activity in the left hemisphere. A small dosage of carbamazepine was remarkably effective in stopping the attacks. This case demonstrates that a thorough ictal electroencephalographic examination is indispensable for clarifying the pathophysiology of kinesigenic attacks. The relationship between paroxysmal kinesigenic choreoathetosis and supplementary motor area seizures is also discussed.     

Paroxysmal kinesigenic dyskinesia: cortical or non-cortical origin

Paroxysmal kinesigenic dyskinesia (PKD) is characterized by involuntary dystonia and/or chorea triggered by a sudden movement. Cases are usually familial with an autosomal dominant inheritance. Hypotheses regarding the pathogenesis of PKD focus on the controversy whether PKD has a cortical or non-cortical origin. A combined familial trait of PKD and benign familial infantile seizures has been reported as the infantile convulsions and paroxysmal choreoathetosis (ICCA) syndrome. Here, we report a family diagnosed with ICCA syndrome with an Arg217STOP mutation. The index patient showed interictal EEG focal changes compatible with paroxysmal dystonic movements of his contralateral leg. This might support cortical involvement in PKD.     

发作性运动障碍的临床特征及发病机制

目的 探讨发作性运动障碍（PMD）的临床特征及发病机制。方法 回顾性分析5例发作性运动诱发舞蹈手足徐动症（PKC）和2例发作性持续运动诱发肌张力障碍（PED）患者的临床资料。结果 5例PKC发作均南突然运动诱发,表现肌肉僵直、肌张力增高3例,表现肢体扭动、肌张力不全3例（其中1例先为肢体僵直后扩展为周身扭动）。2例PED由持续运动诱发,表现为肢体不自主运动,持续数秒至数分钟缓解。脑电图（EEG）或动态脑电图（AEEG）示痫样放电5例,头部CT或MRI检查正常5例,异常2例。4例PKC予卡马西平治疗有效,1例PED予较大剂晕丙戊酸钠有效。结论PMD表现为发作性锥体外系症状,多由突然运动诱发。大部分病例的EEG有痢样放电,抗癫痫药物治疗有效。提示PMD的发病机制可能与癫痫类似或相同。     

Channelopathy: hypothesis of a common pathophysiologic mechanism in different forms of paroxysmal dyskinesia

Paroxysmal dyskinesias are a rare heterogeneous group of neurologic disorders, characterized by transient sudden choreoathetoid or dystonic attacks without loss of consciousness. This study reports a family with six affected members in three generations, and two sporadic cases of paroxysmal dyskinesia. Familial cases of paroxysmal dyskinesia are affected by idiopathic long-lasting paroxysmal exertion-induced dyskinesia and the sporadic cases by idiopathic short-lasting paroxysmal kinesigenic dyskinesia. Familial cases also suffer from epilepsy, mainly of generalized type, with benign outcome; one sporadic case is affected by migraine. Results presented in this neurophysiologic study include electromyography, somatosensory evoked potentials by median nerve stimulation, somatosensory evoked potentials by posterior tibial nerve stimulation, motor evoked potentials by magnetic transcranial cortical stimulation, visual evoked potentials, brainstem auditory evoked potentials, blink reflex, reflex H, and electroencephalography. The clinical and neurophysiologic findings presented here suggest a condition of hyperexcitability at the muscular and brain level, perhaps as a result of an ion channel disorder, which is in agreement with reports in the literature.     

New family with paroxysmal exercise-induced dystonia and epilepsy.

To date, there are few reports of paroxysmal exercise-induced dystonia associated with familial epilepsy. We describe a family with 4 affected members spanning 3 generations, suggestive of autosomal-dominant inheritance, who exhibited typical exercise-induced dystonia, different types of epilepsy (absence and primary generalized seizures), developmental delay, and migraine in variable combinations. Linkage of the disease to loci on chromosome 2 (paroxysmal nonkinesigenic dyskinesia) and chromosome 16 (paroxysmal kinesigenic choreoathetosis, infantile convulsions with choreoathetosis) was excluded, suggesting an as yet unidentified underlying genetic basis.     

Co-segregation of benign infantile convulsions and paroxysmal kinesigenic choreoathetosis

We report seven families and two sporadic cases in which benign infantile convulsions and paroxysmal kinesigenic choreoathetosis were co-segregated. Clinical investigations included physical and neurological examinations, blood electrolyte values, interictal and ictal electroencephalograms, and computed tomography or magnetic resonance imaging of the brain. The family pedigree was confirmed and the clinical history of the relatives was obtained. Seventeen individuals developed infantile convulsions followed by paroxysmal dyskinesias during childhood or adolescence. Six had only infantile convulsions, and two had only paroxysmal dyskinesias. The seizures never persisted into childhood or recurred in adulthood. The seizure type was a complex partial seizure, with or without secondary generalization, in nine of 14 patients. Paroxysmal dyskinesias, a subgroup of paroxysmal kinesigenic choreoathetosis, occurred for less than 5 min. The attacks of dyskinesias began at age 5-12 years in most patients, and tended to remit in adulthood. The mode of inheritance was apparently autosomal dominant in four of the families (17 affected individuals), who were diagnosed with ICCA syndrome (infantile convulsions and paroxysmal choreoathetosis). However, the condition occurred only among siblings in three families (six patients), and sporadically in two patients, suggesting genetic heterogeneity in this distinct co-segregation.     

Ictal (99m)Tc ECD SPECT in paroxysmal kinesigenic choreoathetosis

Paroxysmal kinesigenic choreoathetosis is a rare neurologic disorder characterized by sudden attacks of brief involuntary dyskinetic movement that are precipitated by voluntary movement. A 14-year-old male who presented with frequent brief attacks of hemidystonia triggered by sudden movement is reported. Investigations, including video electroencephalogram and magnetic resonance imaging of brain, were normal. There was excellent and sustained response to carbamazepine. Ictal single-photon emission computed tomography using (99m)Tc ethyl cysteinate dimer revealed increased perfusion of the contralateral basal ganglia, which is associated with onset of choreoathetosis attacks. Our findings provide evidence that hyperactivity of the basal ganglia is associated with the dyskinetic attacks in paroxysmal kinesigenic choreoathetosis.     

Diagnosis of Childhood Seizure Disorders

Summary: Convulsive epilepsies are generally unmistakable. Absence epilepsies, which are easily recognized by the provocation of an episode during hyperventilation and by the typical features of the EEG, can be overdiagnosed, especially in the child who daydreams in class and has scattered, asymptomatic, epileptogenic EEG changes. As in adults, complex partial seizures in children can be difficult to distinguish from certain behaviors. Several types of benign childhood epilepsies need to be distinguished from the more intractable and lesional childhood epilepsies. Two common examples, benign rolandic epilepsy and benign occipital epilepsy, can be recognized by their unique EEG changes and clinical features. Juvenile myoclonic epilepsy generally does not remit spontaneously but should be recognized because it appears to respond to valproate. Some recurrent nonepileptic events seen in children can be mistaken for seizures, including shuddering attacks, paroxysmal vertigo, breath-holding spells, cardiogenic syncope, night terrors, and movement disorders, such as paroxysmal kinesigenic choreoathetosis.     

12例发作性运动诱发性肌张力障碍的临床、脑电图特点及文献复习

目的观察发作性运动诱发性肌张力障碍(PKD)的临床表现、脑电图特征,提高对本病的认识及选择有效的治疗药物。方法回顾性分析12例PKD患者的临床资料、脑电及影像学改变,并结合文献进行总结分析。结果临床症状表现为发作性运动诱发性手足扭转、肢体僵直、舞蹈手足徐动征等,有明确的运动诱发因素,同步脑电记录无异常,正确选择抗癫痫药物可有效控制其发作。结论 PKD是一种少见的运动障碍疾病,应与癫痫、假性发作、TIA、部分性发作等相鉴别。对抗癫痫药物敏感,早期诊断早期治疗预后较好。     

Paroxysmal dyskinesias as a paradigm of paroxysmal movement disorders

Paroxysmal dyskinesias are genetically and clinically heterogeneous. Paroxysmal kinesigenic choreoathetosis is frequently familial, with autosomal-dominant transmission. Benign infantile convulsions can be observed in these families and both diseases as linked to the pericentromeric region of chromosome 16. Two different forms of paroxysmal dystonic choreoathetosis are distinguished on clinical grounds, by the presence or absence of spasticity, and genetically, as they are linked with loci on different chromosomes. Among the paroxysmal disorders, these diseases may belong to the group of channelopathies.     

Dystonic attacks related to sleep and exercise.

Two unrelated children displayed attacks of paroxysmal jerky 'puppet-like' movements lasting 2-3 min. The attacks were not kinesigenic and occurred during wakefulness precipitated by physical exercise and during NREM sleep, spontaneous or upon arousal and awakenings. Paroxysmal dystonic choreoathetosis was excluded by the absent family history, and paroxysmal kinesigenic dystonia by the absence of triggering effects by sudden movements and efficacy of anticonvulsants. Pattern and duration of involuntary movements were not those typical of nocturnal paroxysmal dystonia. Our cases emphasize that overlap exists among the different clinical categories of paroxysmal dyskinesia.     

Paroxysmal kinesigenic dystonic choreoathetosis associated with a thalamic infarct

We describe a patient with the development of paroxysmal kinesigenic dystonic choreoathetosis (PKDC) after a thalamic infarct. PKDC consists of brief episodes of dystonia or choreoathetosis triggered by movement. PKDC improves with anticonvulsants, and in some cases, with L-Dopa or anticholinergics. We review PKDC, and relate its salient features to idiopathic and secondary torsion dystonia. We postulate a similar underlying pathophysiology.     

Regression of ventral striatum hypometabolism after calcium/calcitriol therapy in paroxysmal kinesigenic choreoathetosis due to idiopathic primary hypoparathyroidism

A [(18)F]-FDG PET study was performed in a 44 year old man with proximal kinesigenic choreoathetosis (PKC) secondary to idiopathic primary hypoparathyroidism (IPH) before and 1 year after calcium/calcitriol therapy. The [(18)F]-FDG PET performed before the start of the therapy disclosed a significant bilateral hypometabolism in the ventral striatum. One year later, with the patient still under calcium/calcitriol therapy and free of any occurrence of PKC episodes, the [(18)F]-FDG PET did not show the previously detected hypometabolism. The hypometabolism of the ventral striatum secondary to hypocalcaemia seems to play a crucial part in the pathogenesis of paroxysmal kinesigenic choreoathetosis associated with IPH.