Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0002622 (amnesia)
 5,520 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

All memory disturbances, especially those developing suddenly, cause anxiety of the patient. Transient global amnesia is a form of amnesia of interest in many aspects. The amnesia was described in 1964 by Fisher and Adams, and as yet about 1000 cases have been reported. Middle aged or elderly patients prevail. The attack of amnesia lasts from several to about 20 hours and begins suddenly being regarded as mental confusion. The amnesia covers recent and remote events in many years. During the attack the patient is not appearing to be ill, but is depressed not knowing what has happened. The awareness of own personality, the ability to solve logical problems and visuospatial functions are preserved. The ability to execute complex activities, e.g. car driving, is normal. The aetiology of the disorder is completely unknown. The hypotheses for explaining the syndrome are: 1. ischaemia in the posterior cerebral arteries region with transient fall of blood supply through the vertebrobasilar system, 2. epilepsy or migraine, 3. disturbed aggregation of platelets in the cerebral vessels leading to loss of vessel patency. The first hypothesis seems least plausible. Attacks of this amnesia were noted after triazolam, after thalamic infarction and cerebral angiography, in brain tumours, hydrocephalus, scleroderma, frontal lobe haemorrhage. After an attack the events occurring in it are not remembered. Recurrence of attacks is very rare. Most authors consider that the disorder is benign and regresses without sequelae or only with slight changes in cognitive functions and memory fixation.
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PMID:[Transient global amnesia. Case report]. 130 17

This report describes an acute organic brain syndrome with a fugue-like state in association with antimigraine pharmacotherapy. The differential diagnosis of: 1. possible psychotoxic effects of the combination of propranolol, imipramine, and butalbital; 2. confusional migraine with amnesia; and 3. psychogenic dissociation is considered. Although organically induced dissociative states are of clinical, neuropsychological and medico-legal significance, the DSM-III and DSM-III-R have specific categories only for dissociative conditions that are strictly psychogenic in origin.
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PMID:Organic dissociative syndrome associated with antimigraine pharmacotherapy. 174 15

Transient global amnesia is a momentary neurological accident frequently encountered in subjects over 50 years of age. Its diagnosis is purely clinical and rests on the sudden occurrence of retention amnesia associated with retrograde amnesia without disturbances in speech or other neurological deficits. The amnesia totally regresses within less than 24 hours. Paraclinical examinations add nothing to the diagnosis. The cause of transient global amnesia is unknown, and the various hypotheses that have been put forward (e.g. epilepsy, transient ischaemia or migraine) have not been confirmed by clinical and epidemiological studies. Despite a low, but real risk of recurrence, the prognosis is perfectly benign, and there is no need for curative or preventive treatment.
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PMID:[Transient global amnesia]. 204 91

The authors have studied 30 patients with transient global amnesia aged between 49 and 76 years (median age of 63 years), without focal neurologic signs that have been followed for periods varying between 6 months and 10 years. Three of the patients had recurrent attacks of transient global amnesia, and another three had a stroke, although at some distance from the amnesia attack. Association was noted with certain risk factors including high blood pressure, and angiopathic changes of the eye fundus (in 50% of the patients), dyslipidemia (in 30%), diabetes (in 10%), and essential polyglobulia (in 7%). Coagulation studies including thrombelastograms were carried out in 22 patients, and demonstrated hypercoagulability in 50% of them. Changes in the arterial wall were noted in 85% of the 14 patients in whom carotid sphygmograms were recorded. The presence of these risk factors could explain the occurrence of cerebrovascular accidents in patients with transient global amnesia. Electroencephalograms performed immediately or a short time after the amnesia attack have evidenced in 18 patients rapid-type dysrhythmia, or diffuse theta waves, predominantly located in the deep layers of the left and right temporal areas. The EEG tracings were either flat or normal in the remaining 12 patients. Of the 30 patients presenting with global transient amnesia only two had migraine in antecedents, and another six had headache during the evolution of amnesia. The neurologic examination did not reveal any abnormality in 27 of the patients. Sequelar signs of neurological deficits were noted in the remaining three patients.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[Transient global amnesia (a study of 30 cases)]. 223 8

Transient recurrent confusional and stuporous states of nonepileptic origin are clearly less frequent than epileptic ones. They are relatively common in diseases of disturbed vigilance, like narcolepsy, idiopathic hypersomnolence, and sleep apnea. These patients often suffer from attacks of hypovigilance, characterized by altered awareness, automatic behaviour and partial or complete amnesia for the attack. Because of the memory 'black outs' and the frequently associated hypnagogic hallucinations, the patients behave inappropriately and often appear confused. Confusional states also typically arise during basilar artery migraine attacks. This special form of complicated migraine predominantly affects young females and is characterized by symptoms and signs of brain stem dysfunction such as vertigo, ataxia, paresthesia, limb weakness, dysarthria; in 75% of the cases, disorders of consciousness dominate. Transient ischemic attacks are sometimes recurrent and, when involving the cranial basilar territory, may result in confusional states without significant motor dysfunction. Attacks of transient global amnesia are possibly also ischemic in nature and are assumed to arise from transient bilateral limbic failure. Affecting only memory functions, they are strictly spoken not confusional, but must nevertheless be taken into consideration when proper observation during the attack was not possible.
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PMID:[Non-epileptic impaired consciousness in neurologic diseases]. 267 60

There is some suggestion in the literature that patients with migraine may be at an increased risk for developing complications as a result of cerebral angiography. To assess this risk, we reviewed the charts of 142 patients with migraine. A total of 149 angiograms were performed for acute headache (55), new focal symptoms (40), exertional (including coital) headaches (nine), hemiplegic migraine (three), ophthalmoplegic migraine (five), vertebrobasilar migraine (six), migraine accompaniments (three), and other causes (14). Transient events were seen in six patients and these were transient amnesia (one), hemisensory changes (two), hemiparesis (one), global confusion (one), and angina (one). One patient with a history of severe ischemic heart disease developed a myocardial infarction two hours after angiography. Focal cerebral events occurred in 2.6% of cases. This compares with a rate of complications of 2.8% caused by angiography in a prospective study of 1002 patients from our center. According to our findings, it appears that a history of migraine does not increase the risk of complications caused by angiography. Angiography during episodes of acute headaches would also appear to be a safe procedure. Transient focal neurologic symptoms, however, are not infrequent, especially in cases of classic migraine.
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PMID:Migraine and the risks from angiography. 339 65

In a group of 39 consecutive patients attending neurological clinics with transient amnesia patients with transient global amnesia formed the largest group; others suffered from epilepsy, migraine, temporal lobe encephalitis, or psychogenic fugues. In most cases the clinical features suggested the aetiology, but an electroencephalogram recorded as soon after the attack as possible may help in distinguishing amnesia due to temporal lobe epilepsy.
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PMID:Differential diagnosis of transient amnesia. 475 21

Migraine can be associated with hemiplegia, ophthalmoplegia, retinal and vertebrobasilar insufficiency, amnesia, confusion, altered perception, stupor and even death. Migrainous complications must be differentiated from structural lesions, metabolic disorders, convulsive states are cerebrovascular thromboembolism. Treatment of complicated migraine is directed toward prophylaxis of vasoconstriction. Agents that produce vasoconstriction, such as ergot preparations, and known migraine precipitants should be avoided in migraineurs.
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PMID:Neurologic complications of migraine. 712 78

Three members of a university football team were evaluated because of migraine symptoms precipitated by head trauma. Analysis of the clinical data from these cases, as well as eight previously reported in athletes, reveals that the head trauma is usually minor and not associated with amnesia; and, after a symptom-free interval most often of several minutes, visual, motor, sensory, or brainstem signs and symptoms begin. These usually last for approximately 15 to 30 min and are followed by headache frequently accompanied by nausea and vomiting. In 9 of 11 cases, attacks have occurred with subsequent head trauma. Only 4 of the 11 athletes admitted to spontaneous episodes, however, the incidence may be higher since they have not been followed by a sufficient period of time. Prophylaxis with antimigrainous drugs does not appear to be indicated. The decision as to future participation in contact sports is based primarily on the results of a thorough neurologic evaluation. The possible long-term sequela of this apparent "benign" condition, particularly in those athletes with repeated episodes, is not known since the entity has only recently been recognized. A migraine attack occurring in the course of an athletic event, particularly contact sports, can simulate a serious neurologic emergency. Despite its frequency in the general population and a propensity for onset in the first three decades of life, migraine has not been appreciated in the past as a possible significant sports medicine problem.
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PMID:Migraine precipitated by head trauma in athletes. 737 55

Acute confusional migraine in children and transient global amnesia in adults share a number of similar clinical manifestations. Acute confusional migraine in 6 children (mean age: 11.7 years; range: 7.5-17 years) was characterized by transient episodes of amnesia and acute confusion lasting 1-12 hours. Episodes were preceded by headache and vomiting in 4 patients. In 2 patients acute confusional migraine was the initial symptom. A history of preceding trivial head injury was reported in 3 patients and migraine in 4. Urine and serum drug screens were negative. Cerebral imaging studies and interictal electroencephalograms were normal. Ictal electroencephalograms in 3 patients revealed diffuse or bioccipital delta wave slowing. Recurrent episodes of acute confusional migraine occurred in 2 children during 1-3 years of follow-up. The clinical manifestations of acute confusional migraine in this series of children are similar to those reported in transient global amnesia. The similarity of the clinical manifestations of acute confusional migraine in children and transient global amnesia in adults suggests that these disorders may share a common pathophysiology.
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PMID:Acute confusional migraine: variant of transient global amnesia. 777 9


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