Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0036572 (seizures)
 80,221 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Validity of regional blood flow (rCBF) measurements recorded over the human posterior fossa after 133Xe inhalation was tested. Recording of counts from both brain stem and cerebellum (BSC) was reproducible and contamination by counts derived from surrounding anatomical structures was low and no greater than that found over hemispheres. BSC values were F1 = 99 +/- 19 ml/100g brain/min, F2 = 17 +/- 4 in reasonable agreement with data reported from experimental animals. BSC flow values showed significant correlation with the state of awareness as judged by clinical and EEG evaluation with lowest F1 values in semicoma and step increases in stupor, non-REM sleep, drowsiness, rest, activation, REM sleep and highest values during focal and generalized epileptic seizures.
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PMID:Critical appraisal of cerebral blood flow measured from brain stem and cerebellar regions after 133 Xe inhalation in humans. 50 81

The sleep-inducing and epileptogenic effects of amitripyline (0.5 mg/kg i.m.) were studied in 120 epileptic patients. Sleep occurred in 94 p. 100 of the patients: 92 p. 100 showed stages I and II, 42 p. 100 also showed stages III and IV, but only 12 p. 100 showed REM. Major activation of inter-ictal abnormalities occurred in 41 p. 100 and seizures were provoked in 17 patients (14 p. 100). Neutral results were obtained in 23 p. 100 of cases. The results obtained and the complete absence of drawbacks recommend amitriptyline for use in studying epileptic patients, at least before turning to other pharmacological techniques which are more dangerous and probably less reliable.
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PMID:[Activation with amitriptyline: electroclinical comments on 120 epileptic patients (author transl's)]. 59 60

Although arousal effects from electric stimulation have been found in animals, reports of similar responses in humans have been uncommon. During depth electroencephalography in a 16-year-old boy for evaluation of intractable temporal lobe seizures, electric stimulation of a pair of contact leads located within the dorsal and medial portions of the thalamus but not within specific sensory nuclei produced unequivocal behavioral and electrographic arousals from spontaneous sleep. Lowvoltage stimuli were effective during non-REM and REM sleep. These findings verify the presence of a thalamic arousal system in the human.
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PMID:Spontaneous sleep and induced arousal. A depth-electroencephalographic study. 93 83

The evolution of EEG, visual and auditory evoked responses (VER and AER) and sleep is described in three cases of semilobar holoprosencephaly. During the neonatal period, the waking EEG was characterized by almost continuous high amplitude rhythmic alpha-theta activity in case 1 and 2, which became discontinuous during quiet sleep. Moderate amplitude rhythmic alpha-theta waves were seen in case 3. This rhythmic alpha-theta activity gradually disappeared with increasing age, being replaced by non-specific slow dysrhythmia. In case 3, the subsequent EEGs were characterized by focal spikes at 4 months, multifocal spikes at 5 and 6 months, hypsarrhythmia at 8 months and bisynchronous diffuse sharp and slow wave discharges at 2 years and 7 months. Ictal EEGs were characterized by desynchronization and/or rapid synchronization, epileptic recruiting rhythm and postical high amplitude slow waves. Definite but mostly abnormal VERs or AERs were obtained in all three cases. In two cases, the evoked responses showed a progressive decrease in amplitude and VERs were abolished finally. No sleep cycle could be identified during the neonatal period probably because of frequent seizures. In two cases no circadian rhythm of sleep developed, although almost normal REM-NREM sleep cycle was present.
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PMID:The evolution of neurophysiological features in holoprosencephaly. 98 15

The discharge rate (the number of spikes/min) was determined in the awake state and during different stages of induced sleep in 17 children with "benign epilepsy of childhood with centro-temporal EEG foci". Ten patients had seizures only during sleep. The discharge rate of Rolandic spikes was significantly higher during sleep than during the awake state, and 5 patients had Rolandic discharges only during sleep. For diagnostic purposes, EEG recordings during sleep are indicated when children suspected of having this seizure type have a normal EEG when awake. Brief induced sleep is usually adequate. REM sleep was not studied.
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PMID:Benign epilepsy of children with centro-temporal EEG foci. Discharge rate during sleep. 112 97

Seizure development and transference phenomenon were investigated in hippocampal and amygdaloid kindled cats. The behavioral and electrographic findings during the kindling procedures showed that motor seizure development in hippocampal seizures occurred with the emergence of independent discharging in the amygdala, globus pallidus and contralateral hippocampus. Furthermore, secondary site convulsions developed upon the first stimulation of these structures in the hippocampal group but only after over a month of hippocampal stimulation in the amygdaloid group. It was, therefore, concluded that role of the amygdala and globus pallidus in hippocampal seizure development was more essential than that of hippocampal stimulation in amygdaloid seiqure development. The common findings between the hippocampal and amygdaloid kindled animals were the systematic progression to seizures, the all-or-nothing nature of the electrical response and the relative permanency of the seizure susceptibility. Seizure susceptibility increased during slow wave sleep and decreased during REM sleep. These latter findings were examined with preliminary data of brain bioassays of catecholamines.
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PMID:Kindling: secondary epileptogenesis, sleep and catecholamines. 120 31

Flash evoked visual potentials (VEPs) were recorded in freely moving WAG/Rij rats. These rats show spontaneously occurring spike-wave discharges in the EEG, interpreted as absence-like seizures. VEPs recorded during the presence of spike-wave discharges were compared with those obtained during normal states of vigilance as quiet wakefulness, slow-wave sleep and REM sleep. Almost similar VEPs were recorded during wakefulness and REM sleep, whereas during slow-wave sleep the second positive peak (P2) was considerably larger. In comparison with normal sleep-wake states, VEPs during spike-wave discharges showed unique changes, such as a decrease in the N1 amplitude, an increase of the P4 amplitude and an enhanced afterdischarge. Other characteristics were similar to those seen during slow-wave sleep, such as an increase of the P2 amplitude and a diminished P2-N3-P3 complex. These findings indicate sensory alterations during a spike-wave discharge. As expressed in the decrease of N1, afferent information cannot enter the thalamus during the rhythmic oscillatory mode. Such alterations may underlie the lowered responsiveness to external stimuli during spike-wave activity.
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PMID:Visual evoked potentials during spontaneously occurring spike-wave discharges in rats. 137 32

A case of night terror with sleepwalking in an adult patient is described. Sleep polygraphic data are presented. The literature related to sleepwalking, night terror and its treatment is reviewed. The psychopathologic patterns of sleepwalking and night terror are illustrated and the differentiations of parasomnias and epileptic seizures discussed. The clinical applications of these findings are described and practical recommendations made for the management of NON-REM parasomnia.
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PMID:[Somnambulism and pavor nocturnus--review and case report]. 147 Feb 73

A-EEG is an important recent technologic innovation in EEG recording that facilitates long-term monitoring. The system consists of a miniature cassette tape recorder and a video play-back unit, which permits the taped EEG to be reviewed (Brain Spy CH24, Micromed). Because it is extremely lightweight and portable, the system permits unrestricted activity during recording. On the other hand, this predisposes the recording to more artifacts than are seen in routine recordings. We examined 103 patients, aged 3 months-24 years, between July 1988 and July 1990. Patients were divided into three groups: group 1 included 61 subjects with evidence of epilepsy and clinically definite seizures; group 2 included 29 patients with recurrent episodes that were not clearly epileptic (suspected "pseudo epileptic"); group 3 included 13 subjects with psychiatric disorders. We found that the clinical utility of A-EEG in epileptic children was: 1) obtain better clinical and EEG characterization and circadian distribution of seizures in 17 cases (28%); 2) quantify epileptiform generalized abnormalities and their variations during the sleep in 6 cases (10%); 3) verify the efficacy of specific drug treatment such as Bzd and ACTH in 12 cases (20%). The role of A-EEG in non-epileptic children with pseudoseizures was to establish the epileptic or non epileptic nature of some ictal events by detecting EEG seizure patterns in 11 cases (38%). As to regard the group 3, A-EEG has permitted to study sleep architecture and REM sleep measures, especially in depressed children compared to normal children. We discuss advantages, drawbacks and clinical applications of A-EEG in child neurology and psychiatry vs conventional EEG.
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PMID:[The clinical use of dynamic EEG in childhood]. 151 95

Narcolepsy is clinically associated with cataplexy, sleep paralysis and hypnagogic hallucinations. It is treated by reassurance (that there is no physical disease) and by stimulants such as ephedrine and amphetamine on an intermittent basis. The special tricyclic antidepressant clomipramine is also used, and mono-amine oxidase inhibitors (MAOIs) are useful in theory. Obstructive sleep apnoea is an important and often unrecognised cause of daytime somnolence. It is treated by weight reduction (pickwickian syndrome), hormones, or recently, with continuous positive pressure apparatus. Night terrors (pavor nocturnus) and sleepwalking typically occur during deep sleep (stage 3 and 4 throughout the episode) in children. In a night terror the child sits up with a scream, with eyes open, but inaccessible. He eventually falls asleep calmly. Sleepwalking, too, shows the features of inaccessibility and subsequent amnesia for the episode. Both conditions are normally treated with reassurance (to the parents) but may occasionally warrant benzodiazepines. Enuresis usually occurs in non-rapid eye movement (NREM) sleep, especially stages 3 and 4. The reason for the efficacy of tricyclic antidepressants is not precisely known. Delirium tremens (DT) is treated as a rebound excess of REM sleep, with benzodiazepines and other drugs. It is the withdrawal syndrome (with or without major seizures) to the barbiturate-alcohol group of drugs, which includes alcohol, chloral, paraldehyde, glutethimide, methylprylone, ethchlorvynol, meprobamate and meprobamate-diphenhydramine. Insomnia may be treated by the above drugs, by analgesics, antidepressants, major tranquillisers (neuroleptics) and miscellaneous other compounds. For the majority of patients, however, the most suitable group seems to be the benzodiazepines. The benzodiazepines are much safer than their predecessors, in both acute and chronic usage.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:The treatment of sleep disorders. 158 14


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