Social adjustment in young adults with absence epilepsies

The landscape of drug resistant absence seizures in adolescents and adults: Pathophysiology, electroclinical spectrum and treatment options

The persistence of typical absence seizures (AS) in adolescence and adulthood may reduce the quality of life of patients with genetic generalized epilepsies (GGEs). The prevalence of drug resistant AS is probably underestimated in this patient population, and treatment options are relatively scarce. Similarly, atypical absence seizures in developmental and epileptic encephalopathies (DEEs) may be unrecognized, and often persist into adulthood despite improvement of more severe seizures. These two seemingly distant conditions, represented by typical AS in GGE and atypical AS in DEE, share at least partially overlapping pathophysiological and genetic mechanisms, which may be the target of drug and neurostimulation therapies. In addition, some patients with drug-resistant typical AS may present electroclinical features that lie in between the two extremes represented by these generalized forms of epilepsy.

Genetic generalized epilepsies in adults - challenging assumptions and dogmas

Genetic generalized epilepsy (GGE) syndromes start during childhood or adolescence, and four commonly persist into adulthood, making up 15-20% of all cases of epilepsy in adults. These four GGE syndromes are childhood absence epilepsy, juvenile absence epilepsy, juvenile myoclonic epilepsy and epilepsy with generalized tonic-clonic seizures alone. However, in ~20% of patients with GGE, characteristics of more than one syndrome are present. Novel insights into the genetic aetiology, comorbidities and prognosis of the GGE syndromes have emerged and challenge traditional concepts about these conditions. Evidence has shown that the mode of inheritance in GGE is mostly polygenic. Neuropsychological and imaging studies indicate similar abnormalities in unaffected relatives of patients with GGE, supporting the concept that underlying alterations in bilateral frontothalamocortical networks are genetically determined. Contrary to popular belief, first-line anti-seizure medication often fails to provide seizure freedom in combination with good tolerability. Nevertheless, long-term follow-up studies have shown that with advancing age, many patients can discontinue their anti-seizure medication without seizure relapses. Several outcome predictors have been identified, but prognosis across the syndromes is more homogeneous than previously assumed. Overall, overlap in pathophysiology, seizure types, treatment responses and outcomes support the idea that GGEs are not separate nosological entities but represent a neurobiological continuum.

The quality of life among Sudanese patients with epilepsy, Khartoum, Sudan

INTRODUCTION

This is the first study done in the National Center for Neurological Sciences, Khartoum State, to assess the quality of life among more than 100 Sudanese epileptic patients, in the period from September to December 2020.

METHODOLOGY

This is a descriptive cross-sectional study; data were collected using an interview-based semi-structured structured questionnaire and this questionnaire was modified from the SF-36 model.

RESULTS

Most of the patients were from urban areas and origin (60.2%), most of which were housewives; the majority of the patients were single and from low socioeconomic status, history of the disease was less than 3 years for most of the cases covered in this study, most of the cases were classified as generalized tonic clonic epilepsy, and normal EEG findings and normal MRI brain were found in 75.7% and 78.6%, respectively. Most patients mentioned that they experienced no attacks during the last month. Regarding mental health, 47.6% experienced symptoms of depression, and 75.7% had memory problems. In terms of physical health, 51.5% felt energetic all of the time, 9.7% experienced remarkable sleep disturbance, most of the patients are not driving nor have established hobbies during leisure time. 63.1% of the participants do not have health problems; 32% mentioned that they would feel stigmatized if an attack takes place in public. Commonest medication prescribed was carbamazepine, out of which 73.8% are fully compliant with their medication. 95.1% are not worried about long term use of medication.

CONCLUSION

Lower levels of education and manual labor are associated with poor quality of life. Epilepsy has an adverse impact on social life. There is a global decrease in cognitive function, and most of the patients are not worried about the side effects and duration of the medication usage.

Early alterations of the neuronal network processing whisker-related sensory signal during absence epileptogenesis

OBJECTIVE

Epileptogenesis is the particular process during which the epileptic network builds up progressively before the onset of the first seizures. Whether physiological functions are impacted by this development of epilepsy remains unclear. To explore this question, we used Genetic Absence Epilepsy Rats From Strasbourg (GAERS), in which spike-and-wave discharges are initiated in the whisker primary somatosensory cortex (wS1) and first occur during cortical maturation. We studied the development of both the epileptic and the physiological wS1 circuits during cortical maturation to understand the interactions between them and the consequences for the animals' behavior.

METHODS

In sedated and immobilized rat pups, we recorded in vivo epileptic and whisker sensory evoked activities across the wS1 and thalamus using multicontact electrodes. We compared sensory evoked potentials based on current source density analysis. We then analyzed the multiunit activities evoked by whisker stimulation in GAERS and control rats. Finally, we evaluated behavioral performance dependent on the functionality of the wS1 cortex using the gap-crossing task.

RESULTS

We showed that the epileptic circuit changed during the epileptogenesis period in GAERS, by involving different cortical layers of wS1. Neuronal activities evoked by whisker stimulation were reduced in the wS1 cortex at P15 and P30 in GAERS but increased in the ventral posteromedial nucleus of the thalamus at P15 and in the posterior medial nucleus at P30, when compared to control rats. Finally, we observed lower performance in GAERS versus controls, at both P15 and P30, in a whisker-mediated behavioral task.

SIGNIFICANCE

Our data show that the functionality of wS1 cortex and thalamus is altered early during absence epileptogenesis in GAERS and then evolves before spike-and-wave discharges are fully expressed. They suggest that the development of the pathological circuit disturbs the physiological one and may be responsible for both the emergence of seizures and associated comorbidities.

Absence seizures and their relationship to depression and anxiety: Evidence for bidirectionality

Absence seizures (AS), presenting as short losses of consciousness with staring spells, are a common manifestation of childhood epilepsy that is associated with behavioral, emotional, and social impairments. It has also been suggested that patients with AS are more likely to suffer from mood disorders such as depression and anxiety. This systematic review and meta-analysis synthesizes human and animal models that investigated mood disorders and AS. Of the 1019 scientific publications identified, 35 articles met the inclusion criteria for this review. We found that patients with AS had greater odds of developing depression and anxiety when compared to controls (odds ratio = 4.93, 95% confidence interval = 2.91-8.35, p < .01). The included studies further suggest a strong correlation between AS and depression and anxiety in the form of a bidirectional relationship. The current literature emphasizes that these conditions likely share underlying mechanisms, such as genetic predisposition, neurophysiology, and anatomical pathways. Further research will clarify this relationship and ensure more effective treatment for AS and mood disorders.

Warped rhythms: Epileptic activity during critical periods disrupts the development of neural networks for human communication

It is well established that temporal lobe epilepsy-the most common and well-studied form of epilepsy-can impair communication by disrupting social-emotional and language functions. In pediatric epilepsy, where seizures co-occur with the development of critical brain networks, age of onset matters: The earlier in life seizures begin, the worse the disruption in network establishment, resulting in academic hardship and social isolation. Yet, little is known about the processes by which epileptic activity disrupts developing human brain networks. Here we take a synthetic perspective-reviewing a range of research spanning studies on molecular and oscillatory processes to those on the development of large-scale functional networks-in support of a novel model of how such networks can be disrupted by epilepsy. We seek to bridge the gap between research on molecular processes, on the development of human brain circuitry, and on clinical outcomes to propose a model of how epileptic activity disrupts brain development.

Social outcomes for adults with a history of childhood-onset epilepsy: A systematic review and meta-analysis

OBJECTIVES

This review aimed to describe social outcomes in adulthood for people with a history of childhood-onset epilepsy and identify factors associated with these outcomes; focused on educational attainment, employment, income/financial status, independence/living arrangement, romantic relationships, parenthood, and friendships.

METHODS

A comprehensive search of MEDLINE, EMBASE, and PsycINFO was conducted, as well as forward and backward citation tracking. A total of 45 articles met inclusion criteria. Random effects meta-analyses were conducted, and subgroup analyses evaluated outcomes for people with epilepsy (PWE) with good prognosis (e.g., normal intelligence, 'epilepsy-only') and poor prognosis (e.g., intellectual disability, Dravet syndrome), and those who underwent epilepsy surgery in childhood.

RESULTS

Among all PWE, 73% (95% confidence interval [CI]: 64-82%) completed secondary school education, 63% (95%CI: 56-70%) were employed; 74% (95%CI: 68-81%) did not receive governmental financial assistance; 32% (95%CI: 25-39%) were in romantic relationships; 34% (95%CI: 24-45%) lived independently; 21% (95%CI:12-33%) had children, and 79% (95%CI: 71-87%) had close friend(s). People with epilepsy often fared worse relative to healthy controls. Among PWE with a good prognosis, a comparable number of studies reported similar/better outcomes relative to controls as reported poorer outcomes. The most consistent predictor of poorer outcomes was the presence of cognitive problems; results of studies evaluating seizure control were equivocal.

CONCLUSION

People with epilepsy with a good prognosis may show similar social outcomes as controls, though robust conclusions are difficult to make given the extant literature. Seizure control does not guarantee better outcomes. There is a need for more studies evaluating prognostic factors and studies with control groups to facilitate appropriate comparisons.

Health-related quality of life in adolescents with epilepsy in Montenegro

OBJECTIVE

The objective of this study was to establish potential risk factors for poor health-related quality of life among adolescents with epilepsy in Montenegro.

MATERIAL AND METHODS

A sample of 104 adolescents with epilepsy (age: 11-19years) at a tertiary referral center in Podgorica, Montenegro, completed the validated Serbian version of the QOLIE-AD-48 questionnaire. They were divided into two groups: a group with active epilepsy (60 adolescents) and a group with inactive epilepsy (44 adolescents). Demographic and clinical data were collected.

RESULTS

Adolescents with active epilepsy had low quality of life and felt the negative impact of the disease. They also had more cognitive impairments, felt more stigmatized, and had considerably more distorted perception of their health than adolescents with inactive epilepsy (p<0.05). Females reported better social support than males (p<0.05). Older males had lower grades at school (p<0.05) than the younger ones. As expected, adolescents with the highest number of seizures in the past two years had the lowest quality of life (p<0.05).

CONCLUSION

In our study, the quality of life in adolescents with epilepsy was determined by severity of the disease, age, and gender.

Outcome of childhood-onset epilepsy from adolescence to adulthood: Transition issues

This is the second of three papers that summarize the second symposium on Transition in Epilepsies held in Paris in June 2016. This paper addresses the outcome for some particularly challenging childhood-onset epileptic disorders with the goal of recommending the best approach to transition. We have grouped these disorders in five categories with a few examples for each. The first group includes disorders presenting in childhood that may have late- or adult-onset epilepsy (metabolic and mitochondrial disorders). The second group includes disorders with changing problems in adulthood (tuberous sclerosis complex, Rett syndrome, Dravet syndrome, and autism). A third group includes epilepsies that change with age (Childhood Absence Epilepsy, Juvenile Myoclonic Epilepsy, West Syndrome, and Lennox-Gastaut syndrome). A fourth group consists of epilepsies that vary in symptoms and severity depending on the age of onset (autoimmune encephalitis, Rasmussen's syndrome). A fifth group has epilepsy from structural causes that are less likely to evolve in adulthood. Finally we have included a discussion about the risk of later adulthood cerebrovascular disease and dementia following childhood-onset epilepsy. A detailed knowledge of each of these disorders should assist the process of transition to be certain that attention is paid to the most important age-related symptoms and concerns.

Neurocognitive Profiles in Childhood Absence Epilepsy

Although neuropsychological studies have demonstrated specific cognitive impairments in children with childhood absence epilepsy (CAE), the potential role of the frontal lobe in these cognitive deficits remains unclear. We therefore evaluated cognitive functions related to and unrelated to the functionality of the frontal lobe in childhood absence epilepsy patients and control subjects. Thirty-seven childhood absence epilepsy patients and 37 age- and gender-matched healthy control subjects were recruited and assessed using a computerized neuropsychological test battery. Childhood absence epilepsy patients, especially a drug-naïve subgroup, showed cognitive deficits in reasoning, visual attention, and executive function, which are typical cognitive functions of the frontal lobe. In contrast, treated childhood absence epilepsy patients only exhibited cognitive deficits in visual attention. There were no significant between-group differences for other cognitive tests. Our findings suggest that frontal lobe-related cognitive deficits represent the characteristic neuropsychological profile associated with childhood absence epilepsy.

Does the concept of resilience contribute to understanding good quality of life in the context of epilepsy?

A significant body of research highlights negative impacts of epilepsy for individual quality of life (QOL). Poor seizure control is frequently associated with reporting of poor QOL and good seizure control with good QOL; however, this is not a universal finding. Evidence suggests that some people enjoy good QOL despite ongoing seizures while others report poor QOL despite good seizure control. Understanding the factors that influence QOL for people with epilepsy and the processes via which such factors exert their influence is central to the development of interventions to support people with epilepsy to experience the best possible QOL. We present findings of a qualitative investigation exploring influences and processes on QOL for people with epilepsy. We describe the clinical, psychological, and social factors contributing to QOL. In particular, we focus on the value of the concept of resilience for understanding quality of life in epilepsy. Based on our analysis, we propose a model of resilience wherein four key component sets of factors interact to determine QOL. This model reflects the fluid nature of resilience that, we suggest, is subject to change based on shifts within the individual components and the interactions between them. The model offers a representation of the complex influences that act and interact to either mitigate or further compound the negative impacts of epilepsy on individual QOL.

Refractory absence seizures: An Italian multicenter retrospective study

BACKGROUND

To evaluate evidence and prognosis of refractory cases of absence seizures.

METHODS

Subjects with refractory absence seizures were identified retrospectively in 17 Italian epilepsy pediatrics Centers. We analyzed age at onset, family history, presence of myoclonic components, seizure frequency, treatment with antiepileptic drugs (AEDs), interictal electroencephalography (EEG) and neuropsychological assessment. Two subgroups were identified: one with patients with current absence seizures and another with patients that had become seizure free with or without AED treatment. The chi-square test was applied.

RESULTS

A total of 92 subjects with drug-resistant absence seizures were analyzed. 45 subjects still show absence seizures (49%) and the other 47 became seizure free (51%) after a period of drug-resistance. The statistical analysis between these two groups showed no correlation between age of onset, family history and abnormalities at interictal EEG. Statistically significant differences were observed with regard to the number of AEDs used and intellectual disability.

CONCLUSION

Typical absence epilepsy classifiable as Childhood Absence Epilepsy could not be considered so "benign", as suggested in literature. A longer duration of disease and a higher frequency of seizure seem to be correlated with a higher presence of cognitive impairment. No significant risk factor was observed to allow the faster and better recognition of patients with worse prognosis.

Life quality and health in adolescents and emerging adults with epilepsy during the years of transition: a scoping review

AIMS

The aims of this study were to (1) search the literature in order to identify the challenges facing adolescents and emerging adults with epilepsy; and (2) categorize these issues within both the framework of the International Classification of Functioning, Disability and Health (ICF) and an empirical model of quality of life (QOL) in childhood epilepsy.

METHOD

We systematically searched PsycINFO, Ovid MEDLINE and Web of Science for studies reporting on QOL and health identified in people with epilepsy aged 12 to 29 years. Studies were limited to those that were published in the last 20 years in English, presenting the patient perspective. Data were extracted and charted using a descriptive analytical method. Identified issues were classified according to the ICF and QOL frameworks.

RESULTS

Fifty four studies were identified. Another 62 studies with potentially useful information were included as an addendum. The studies highlight a range of psychosocial issues emphasizing peer acceptance, social isolation, and feelings of anxiety, fear, and sadness.

INTERPRETATION

The ICF and QOL constructs represent useful starting points in the analytical classification of the potential challenges faced by adolescents with epilepsy. Progress is needed on fully classifying issues not included under these frameworks. We propose to expand these frameworks to include comorbidities, impending medical interventions, and concerns for future education, employment, marriage, dignity, and autonomy.

Current advances in childhood absence epilepsy

BACKGROUND

Childhood absence epilepsy is an age-dependent, idiopathic, generalized epilepsy with a characteristic seizure appearance. The disorder is likely to be multifactorial, resulting from interactions between genetic and acquired factors, but the debate is still open. We review recent studies on different aspects of childhood absence epilepsy and also to describe new concepts.

METHODS

Data for this review were identified using Medline and PubMed survey to locate studies dealing with childhood absence epilepsy. Searches included articles published between 1924 and 2013.

RESULTS

The diagnosis comprises predominant and associated seizure types associated with other clinical and electroencephalographic characteristics. Many studies have challenged the prevailing concepts, particularly with respect to the pathophysiological mechanisms underlying the electroencephalographic seizure discharges. Childhood absence epilepsy fits the definition of system epilepsy as a condition resulting from the persisting susceptibility of the thalamocortical system as a whole to generate seizures. This syndrome, if properly defined using strict diagnostic criteria, has a good prognosis. In some cases, it may affect multiple cognitive functions determining risk for academic and functional difficulties; the detection of children at risk allows tailored interventions. Childhood absence epilepsy is usually treated with ethosuximide, valproate, lamotrigine, or levetiracetam, but the most efficacious and tolerable initial empirical treatment has not been well defined.

CONCLUSIONS

We review recent studies and new concepts on the electroclinical features and pathophysiological findings of childhood absence epilepsy in order to highlight areas of consensus as well as areas of uncertainty that indicate directions for future research.

The prognosis of idiopathic generalized epilepsy

Prognosis describes the trajectory and long-term outcome of a condition. Most studies indicate a better prognosis in idiopathic generalized epilepsy (IGE) in comparison with other epilepsy syndromes. Studies looking at the long-term outcome of different IGE syndromes are relatively scant. Childhood absence epilepsy appears to have a higher rate of remission compared to juvenile absence epilepsy. In absence epilepsies, development of myoclonus and generalized tonic-clonic seizures predicts lower likelihood of remission. Although most patients with juvenile myoclonic epilepsy (JME) achieve remission on antiepileptic drug therapy, <20% appear to remain in remission without treatment. Data on the prognosis of other IGE syndromes are scarce. There are contradictory findings reported on the value of electroencephalography as a predictor of prognosis. Comparisons are made difficult by study heterogeneity, particularly in methodology and diagnostic criteria.

Impaired attention and network connectivity in childhood absence epilepsy

Patients with childhood absence epilepsy (CAE) often demonstrate impaired interictal attention, even with control of their seizures. No previous study has investigated the brain networks involved in this impairment. We used the continuous performance task (CPT) of attentional vigilance and the repetitive tapping task (RTT), a control motor task, to examine interictal attention in 26 children with CAE and 22 matched healthy controls. Each subject underwent simultaneous 3T functional magnetic resonance imaging-electroencephalography (fMRI-EEG) and CPT/RTT testing. Areas of activation on fMRI during the CPT task were correlated with behavioral performance and used as seed regions for resting functional connectivity analysis. All behavioral measures reflecting inattention were significantly higher in patients. Correlation analysis revealed that impairment on all measures of inattention on the CPT task was associated with decreased medial frontal cortex (MFC) activation during CPT. In addition, analysis of resting functional connectivity revealed an overall decrease within an 'attention network' in patients relative to controls. Patients demonstrated significantly impaired connectivity between the right anterior insula/frontal operculum (In/FO) and MFC relative to controls. Our results suggest that there is impaired function in an attention network comprising anterior In/FO and MFC in patients with CAE. These findings provide an anatomical and functional basis for impaired interictal attention in CAE, which may allow the development of improved treatments targeted at these networks.

Coping style and quality of life in patients with epilepsy: a cross-sectional study

Having epilepsy has a large impact on one's well-being, but often seizure frequency and severity do not explain self-reported quality of life. We hypothesized that one's personal coping style is more important. In this study, 105 patients attending the outpatient neurological clinic at the University Medical Centre in Utrecht, the Netherlands, with a diagnosis of partial epilepsy, aged 17-80 years, completed questionnaires. Demographic information, disease characteristics, health-related quality of life (HRQoL), and coping styles were obtained by postal-validated HRQoL questionnaires: the EQ5D and RAND-36 and the Utrecht Coping List. A passive coping style explained 45% of the variance in the mental component of HRQoL and was more important than 'objective' seizure-related measures. Confounders such as employment, gender, and side-effects of treatment explained another 6%. Passive coping style also influenced the physical component of the HRQoL, but here seizure-related factors predominated. Overall, epilepsy patients showed a more avoiding coping style, and female patients a less active coping style and more reassuring thoughts, compared to the Dutch population. The personal coping style of patients appears to be more important than seizure-related measures in predicting mental aspects of quality of life. Coping style characteristics rather than disease characteristics should guide clinical decision-making in patients with epilepsy. Further studies should investigate the effect on HRQoL of behavioral interventions to improve coping.

Self-perceptions of social function 2 years after pediatric epilepsy surgery

The present qualitative study explored how participants perceive their quality of life within the social domain 2 years following epilepsy surgery. Semistructured, open-ended interviews were conducted with 27 participants (11-21 years old), 2 years following epilepsy surgery. Thirteen of the 27 participants were seizure free. Data were transcribed and coded inductively to allow for the identification of salient themes. Many of the seizure-free participants reported greater independence following surgery. However, most participants, irrespective of seizure status, continued to report some problems with peer relations and isolation. These findings suggest that self-perceived improvements in social function among seizure-free participants may require longer than 2 years to develop.

Early treatment suppresses the development of spike-wave epilepsy in a rat model

PURPOSE

Current treatments for epilepsy may control seizures, but have no known effects on the underlying disease. We sought to determine whether early treatment in a model of genetic epilepsy would reduce the severity of the epilepsy phenotype in adulthood.

METHODS

We used Wistar albino Glaxo rats of Rijswijk (WAG/Rij) rats, an established model of human absence epilepsy. Oral ethosuximide was given from age p21 to 5 months, covering the usual period in which seizures develop in this model (age approximately 3 months). Two experiments were performed: (1) cortical expression of ion channels Nav1.1, Nav1.6, and HCN1 (previously shown to be dysregulated in WAG/Rij) measured by immunocytochemistry in adult treated rats; and (2) electroencephalogram (EEG) recordings to measure seizure severity at serial time points after stopping the treatment.

RESULTS

Early treatment with ethosuximide blocked changes in the expression of ion channels Nav1.1, Nav1.6, and HCN1 normally associated with epilepsy in this model. In addition, the treatment led to a persistent suppression of seizures, even after therapy was discontinued. Thus, animals treated with ethosuximide from age p21 to 5 months still had a marked suppression of seizures at age 8 months.

DISCUSSION

These findings suggest that early treatment during development may provide a new strategy for preventing epilepsy in susceptible individuals. If confirmed with other drugs and epilepsy paradigms, the availability of a model in which epileptogenesis can be controlled has important implications both for future basic studies, and human therapeutic trials.

Social functioning and psychological well-being of 347 young adults with epilepsy only--population-based, controlled study from Finland

PURPOSE

To explore social functioning and psychological well-being in a population-based cohort of epilepsy patients compared to matched controls.

METHODS

A random sample of patients with epilepsy (N = 347) and a healthy control group (N = 430) matched for age, gender and domicile were identified through National Registry of Social Insurance Institution in Finland. The data were collected by postal questionnaire assessing various factors related to social and psychological well-being and were analyzed by using linear regression analysis to compare the study and control groups.

RESULTS

The age at onset of epilepsy was significantly associated with the level of further education and the level of seizure control with the employment status. The patients with epilepsy and lower level of basic education had also significantly lower level of further education, employment, and fewer social relations. Some differences in psychological well-being were also seen in those with matriculation examination when compared to matched controls.

CONCLUSIONS

In young adults with well-controlled epilepsy and successful basic education, social functioning is comparable with healthy peers. The importance of all social and educational support during the time of basic education may be crucial to favorable intellectual, functional, and social development later in life. Both professional and informal support is needed in adjunct to conventional treament of epilepsy, which is emphasized.

Quality of life in young adults with uncomplicated epilepsy

This aim of this study was to illuminate quality of life (QOL) of young adults with epilepsy. Subjects (n=102) answered the Quality of Life Index (QLI) questionnaire together with an overall open question (n=95/102) regarding the impact of epilepsy on daily life. The highest QOL was reported in relation to the family domain, and the lowest, in relation to the psychological/spiritual domain. Overall the participants were satisfied with their lives. Most important were the well-being of their families, their relationships with their spouses, and their ability to control their lives. Half of the participants experienced a negative effect of epilepsy on their daily lives. Of those, 70% considered the effect insignificant or small. This study supports the conclusions that uncomplicated epilepsy does not significantly affect QOL in young adulthood and that the risk of social isolation due to uncomplicated epilepsy is not significantly increased.

GABAB receptor antagonism abolishes the learning impairments in rats with chronic atypical absence seizures

Chronic atypical absence seizures are a component of the Lennox-Gastaut syndrome, a disorder invariably associated with severe cognitive impairment in children. However, the cause of this intellectual delay remains unclear. The AY9944 model of chronic atypical absence seizures in rats reliably reproduces the electrographic, behavioral, pharmacological and cognitive features of clinical atypical absence. Using this model, we tested the hypothesis that the cognitive impairment associated with this disorder involves a gamma-aminobutyric acid B (GABA(B)) receptor-mediated mechanism. Therefore, we examined the effect of a specific, high affinity GABA(B) receptor antagonist, CGP35348, on the atypical absence seizures, the working memory deficits, and the altered long-term potentiation that we have observed in the AY9944 model. CGP35348 blocked atypical absence seizures, restored long-term potentiation to normal level, and reversed the cognitive deficit in the AY9944-treated animals. However, dose-response studies showed that lower doses of CGP35348 that failed to influence atypical absence seizure activity, completely reversed the spatial working memory deficit. These data suggest that GABA(B) receptor-mediated mechanisms are responsible for the cognitive dysfunction in the AY9944 model of chronic atypical absence seizures and further, that their cognitive impairment is independent of the seizure activity. The data raise the possibility that GABA(B) receptor antagonists may have therapeutic potential for the treatment of cognitive impairment in epilepsy syndromes where atypical absence seizures are a component.

Idiopathic epileptic syndromes and cognition

Epilepsy is frequently associated with cognitive impairments which result from various interacting factors. The present paper deals with the contribution of neuropsychology to the characterization of the type of epilepsy and the possible mechanisms underlying idiopathic epileptic syndromes. The non-lesional, so-called idiopathic epilepsies, constitute an interesting model for assessing the relationship between epileptiform EEG discharges and cognition. Among the idiopathic generalized epilepsies, disorders of social integration and personality have been frequently reported in juvenile myoclonic epilepsy (JME). Since similar disturbances are observed in frontal-lobe-lesioned patients, impairments in other frontal lobe functions (e.g. executive functions) might be expected in JME. This gives rise to speculation about the possible underlying pathophysiological mechanisms in JME. With regard to partial idiopathic epilepsies, benign childhood epilepsy with centrotemporal spikes (BCECTS) may provide a useful model for the study of the relationship between epileptiform EEG discharges in the peri-sylvian region and language functions. Furthermore, the description of mild cognitive dysfunctions in BCECTS, and their persistence into adulthood, can provide information about compensatory mechanisms and may allow for the generation of remedial strategies. Thus, 'lesional' neuropsychology has given way to 'dynamic' neuropsychology based on specific postulates. By using the cognitive profile to specify the mechanism underlying the behavioral disturbances observed in different types of epilepsy, neuropsychology may eventually contribute to a revision of the present classification of epileptic syndromes. In addition, the neuropsychological data may help predict the extent and limits of functional recovery and cerebral plasticity.

Perceived Impact of Childhood‐onset Epilepsy on Quality of Life as an Adult

PURPOSE

Childhood-onset epilepsy is a common disorder. The long-term impact of having childhood epilepsy on quality of life (QOL) as an adult, whether or not seizures are in remission, has not been systematically studied.

METHODS

A population-based cohort of 245 children younger than 16 years with active epilepsy between 1961 and 1964 residing in the catchment area of Turku University Hospital was followed up prospectively until 1997. Of the 99 surviving cases with uncomplicated epilepsy and 99 matched population controls, 91 subjects and controls completed questionnaires on QOL and psychosocial outcomes.

RESULTS

Of the 91 subjects, 61 (67%) were in remission off medication, 13 (14%) in remission on medications, and 17 (19%) were not in remission. Subjects on medication, whether in remission or not, had worse scores on both general measures of QOL and epilepsy-specific measures than did either controls or subjects in remission off medications. They also had significantly higher rates of unemployment (p < 0.001) and lower socioeconomic status. These differences could not be accounted for by differences in education or seizure frequency. Subjects in remission off medication had rates of employment and socioeconomic status similar to those of controls. All subjects, regardless of remission status, had lower rates of marriage and of having children than did controls (p < 0.001).

CONCLUSIONS

Childhood-onset epilepsy has a persistent long-term adverse impact on health-related quality of life. The major impact is on those still on medications as adults, whether or not they are in remission. The impact on those in remission off medications is relatively modest.

Health-related quality of life in youth: a comparison between adolescents and young adults with uncomplicated epilepsy and healthy controls

PURPOSE

To describe health-related quality of life (HRQOL) in adolescents and young adults with uncomplicated epilepsy and to compare it with a random sample of the general population.

METHODS

Young people, aged 13-22 years, meeting the criteria and registered in four Swedish hospitals answered questionnaires (n = 158/193) on HRQOL together with 282 (n = 282/390) random controls living in the same areas in Sweden. The instruments used were "I think I am," "Youth Self Report," "Sense of coherence," and "Family APGAR." Data were analyzed by using factorial analysis of variance.

RESULTS

Girls had a poorer HRQOL than boys. The epilepsy group reported lower competence (i.e., they were less active, had lower social competence and poorer school achievement). Both groups had an overall positive self-esteem. Differences between girls in the epilepsy and control groups were small, whereas differences among boys were more evident. Older age was related to poorer HRQOL in both groups.

CONCLUSIONS

This study points out the importance of being observant of signs of stigmatization in adolescents with epilepsy.

Natural history of absence epilepsy in children

Absence seizures may be seen in a variety of epileptic syndromes in childhood. Identification of the specific syndrome is important to determine medical prognosis. With childhood absence epilepsy, approximately two thirds of children can be expected to enter long-term remission, while in juvenile absence epilepsy, seizure control is often achieved, however, lifelong treatment is usually required. Other absence syndromes have a poorer prognosis, with lower rates of seizure control and remission. Psychosocial outcome is often poor, even in patients with more benign forms of absence epilepsy. Remission of epilepsy does not preclude psychosocial morbidity.

Seizures and therapy in adolescents with uncomplicated epilepsy

PURPOSE

This study aimed to describe seizures and their therapy among Swedish adolescents, aged 13-22, with active but uncomplicated epilepsy.

METHOD

The adolescents answered questionnaires (158/193). Data were also obtained from medical records.

RESULTS

Epileptic seizure types could be specified in 92.1% of the cases. Predominant types were Primary Generalised Tonic-Clonic Seizures and Partial Complex Seizures with Secondary Generalisation. Clinical diagnoses by physicians were unspecified in 25.8%. Ninety percent were on antiepileptic drugs (AEDs), most commonly valproate and carbamazepine. New AEDs were used in 9.3% of the cases and polytherapy in 13.9%. More than 40% of the respondents had seizures despite AED treatment. Side effects of AEDs were experienced by 61%, most commonly tiredness, concentration difficulties and headache. Patients on polytherapy experienced significantly more side effects. The choice of a new AED over a traditional one was not related to seizure type or seizure control.

CONCLUSIONS

Many adolescents had persistent seizures despite treatment at a specialist regional epilepsy centre. This, plus the high reported rate of side effects of AED treatment, suggests that treatment is not optimal for the group studied. As traditional AEDs strongly dominated treatment possibly newly marketed AEDs are underused in this group.

Childhood epilepsy: what is the evidence for what we think and what we do?

This article reviews the strength of the evidence that underlies the current approach to the management of childhood epilepsy. The authors reviewed published, peer-reviewed English literature accessed through PubMed and Cochrane reviews with evidence rated as Class 1 (strongest) to Class 4 (weakest). There is considerable inaccuracy in the diagnosis of seizures and epilepsy syndromes. Sound information supports the consensus that the diagnosis of epilepsy should await two unprovoked seizures. Population-based studies indicate that remission from childhood onset epilepsy occurs in at least 50% of children. It is easier to predict a good seizure outcome than a poor one. Absence of concomitant neurologic handicap and onset before about 12 years of age are the most consistent predictors of remission. Intractability is poorly defined and difficult to predict until several antiepilepsy drugs have been used and failed to control the seizures. Most epilepsy syndrome diagnoses do not yield an accurate prognosis. Social outcome appears unsatisfactory in about 50% of cases without intellectual handicap. Death is rare in childhood epilepsy. Those without severe neurologic handicaps have the same mortality as the general population. We identified only 27 published randomized trials of antiepilepsy drugs in children that compare the efficacy of antiepilepsy drugs, offer treatment of syndromes currently without successful treatment, or have negative effects. There is a pressing need for better definitions of seizures and epilepsy syndromes. The causes of poor social outcome are unclear. Intractability needs a clear definition and randomized trials comparing treatment regimes are sadly lacking.

Socioeconomic prognosis after a newly diagnosed unprovoked epileptic seizure in adults: a population-based case-control study

PURPOSE

To investigate the socioeconomic prognosis after a newly diagnosed unprovoked epileptic seizure in adults.

METHODS

Sixty-three patients 17 years or older with a newly diagnosed unprovoked epileptic seizure from 1985 through 1987 and 107 sex- and age- matched controls were followed up for 10 years to 1996. Studied variables were income, source of income, sickness periods, incapacity rate, diagnosis-specific incapacity rate, vocational status, and education.

RESULTS

Relative growth of income was similar between patients and controls during follow-up. Patients had lower income than did controls 2 years before seizure onset and during the entire follow-up. This was related to higher morbidity among patients, as measured by sickness periods and incapacity rate. Employment rates did not evolve negatively among patients after seizure onset and were close to employment rates of controls during follow-up time. There was no difference between patients and controls regarding education.

CONCLUSIONS

After a newly diagnosed unprovoked epileptic seizure in adults, no negative development regarding employment and education occurs. Income development is positive unless refractory seizures evolve. However, income is lower among patients with epilepsy than among controls, and this difference can be related to overall morbidity.

Epileptic syndromes in childhood: clinical features, outcomes, and treatment

We reviewed the clinical features, outcome, and treatment of many of the epileptic syndromes that begin in the childhood from 2 to 12 years of age, using a review of the literature and personal experience, with most references to authoritative texts. The developmental tasks of childhood are centered on refinement of motor skills and development of complex intellectual and social skills. The childhood onset epilepsies can be divided into benign, intermediate, and catastrophic based on their impact on childhood development. The clearest benign epilepsy is benign rolandic epilepsy, which often does not require medication treatment. The definition of benign occipital epilepsy is still often vague. In the intermediate category, childhood absence epilepsy often has associated learning disorders and a poor social outcome. About 50% of children with cryptogenic partial seizures have a very benign course, even though their epilepsy syndrome is not well defined. Generalized epilepsy with febrile seizures plus (GEFS+) has a dominant inheritance with a defined defect in cerebral sodium channels, but varies considerably in severity within affected members of the same kindred. The catastrophic epilepsies in childhood all have an inconsistent response to AED treatment and include continuous spike-wave in slow sleep (with variable severity), Landau-Kleffner syndrome (with a confusing overlap with autistic regression), the Lennox Gastaut syndrome (with broad defining features), and myoclonic-astatic epilepsy (with important overlaps with Lennox-Gastaut). Many of the epilepsies that begin in childhood are benign. Others interfere seriously with cognitive and social development.

Lower level of education in young adults with arthritis starting in the early adulthood

An appropriate education may lead to less work disability in patients with arthritis. The aim of the study was to determine the educational level in two groups of young adults with arthritis. Patients with juvenile arthritis ( JA, n=32) and patients with early adult onset of arthritis (EA, n=47) were examined with the Quality of Life Scale (QOLS) and a questionnaire concerning education and profession counselling. Comparisons with a reference group (n=95) from the general population were made. The EA group had lower level of education (p<0.01), compared to the reference group. Among the EA patients, 62% had not discussed their choice of occupation with anybody, compared to 19% in the JA group. The educational level was lower in patients with rheumatic disease starting in early adulthood. Educational issues and counselling should be focused on the care of young adults with arthritis.

Update on the epidemiology and prognosis of pediatric epilepsy

Epilepsy is among the most common serious neurologic disorders in childhood. Epidemiologic studies over the past few decades have greatly increased current knowledge of the incidence and prognosis of seizures. Newer epidemiologic studies have used population- or community-based cohorts, and careful attention has been given to etiology and specific epilepsy syndromes, the two most important factors affecting prognosis. Risk of epilepsy is highest in patients with an associated serious neurologic abnormality, such as mental retardation or cerebral palsy. More than two thirds of patients with childhood-onset epilepsy ultimately achieve remission. Of those attaining remission on medications, approximately 70% remain seizure free when medications are discontinued. Mortality is increased in patients with epilepsy, but the increased mortality risk in childhood-onset epilepsy is primarily seen in patients with neurologic abnormalities or intractable epilepsy. Although long-term seizure outcomes are generally favorable, childhood-onset epilepsy is associated with adverse long-term psychosocial outcomes, even in patients attaining remission. This review summarizes recent data on the epidemiology and prognosis of pediatric epilepsy.

Social deprivation and prevalence of epilepsy and associated health usage

OBJECTIVES

To examine the relation between social deprivation and the prevalence of epilepsy and associated morbidity using hospital activity data as a proxy.

METHODS

The study was conducted in the health district of South Glamorgan, United Kingdom (population 434 000). Routinely available hospital data (inpatient and outpatient), an epilepsy clinic database, and mortality data underwent a process of record linkage to identify records relating to the same patient and to identify patients with epilepsy. Each patient was allocated a Townsend index deprivation score on the basis of their ward of residence. Age standardised correlations were calculated between deprivation score and prevalence of epilepsy, inpatient admissions, and outpatient appointments. Standardised mortality ratios (SMR) were also calculated. All analyses were performed on two cohorts: (1) all patients with epilepsy and (2) those patients with epilepsy without any underlying psychiatric illness or learning disability.

RESULTS

The prevalence of epilepsy ranged between 2.0 and 13.4 per 1000 with a median of 6.7. There were positive correlations between social deprivation and prevalence in both populations: (1) r=0.75 (p<0.001) and (2) r=0.70 (p<0.001). After standardising for underlying prevalence there were also correlations for mean inpatient admissions: (1) r=0.62 (p<0.001), (2) r=0.59, (p<0.001) and for outpatient appointments: (1) r=0.53, (p=0.001) and (2) r=0. 51 (p=0.001). The SMR for those deprived was (1) 1.66 (95% confidence interval (95% CI) 1.27-2.05) and (2) 1.80 (95% CI 0.71-1. 67). For the population as a whole (with and without epilepsy) the SMR was 1.25 (95% CI 1.27-2.32).

CONCLUSION

This study shows a strong correlation between the prevalence of epilepsy and social deprivation and weaker correlations between social deprivation and mean hospital activity.

[Epilepsy, epileptics, the work: conflicting relations]

Participation in the workplace by people with epilepsy is conditioned by various interrelated issues concerning epilepsy itself, the epileptic individual, and society's implicit cultural codes. In order to analyze how such conflictive participation interferes decisively in the quality of life of people with epilepsy, a survey was conducted with 339 patients at the University Hospital of Universidade Federal Fluminense. Patients answered questionnaires including level of schooling, professional qualifications, employment situation, frequency, type, and duration of seizures, associated phenomena, and prejudice towards epilepsy. We observed that satisfactory management of seizures is decisive for their success at work. All patients with daily seizures and 9.3% of those with weekly seizures had never been employed. We conclude that any intervention in this context must include the implementation of multiprofessional and intersectorial therapeutic programs and legislation to protect epileptic patients' rights in a broad effort at demystification of epilepsy.

Long-term prognosis of seizures with onset in childhood

BACKGROUND

The long-term prognosis of seizures that begin in childhood is uncertain.

METHODS

We prospectively studied 245 children from the catchment area of Turku University Hospital in Turku, Finland, who had active epilepsy diagnosed between 1961 and 1964. Sixty-eight patients (28 percent) had idiopathic seizures (presumed to have a genetic origin), 54 (22 percent) had cryptogenic seizures (occurring in otherwise normal persons with no clear cause), and 123 (50 percent) had remote symptomatic seizures (with no immediate cause but occurring in persons with a prior brain injury or a static encephalopathy).

RESULTS

At the final follow-up in 1992, we had sufficient data on 220 patients (90 percent), 176 of whom were alive and 44 of whom had died; the remaining 25 had emigrated, could not be traced, or declined to participate. Thirty-nine patients who died were not free of seizures at the time of death, and 33 had remote symptomatic seizures. Among the surviving patients, 112 (64 percent) had been seizure-free for at least five years, including 83 (47 percent) who were not taking antiepileptic medications. The most important predictors of being seizure-free for at least five years were a rapid response to therapy (defined as a reduction in the frequency of seizures of 75 to 100 percent within three months of beginning treatment) and a diagnosis of idiopathic seizures. As compared with a matched control group, 99 patients with epilepsy but no other initial neurologic impairment were of similar socioeconomic status and had similar rates of passing an examination given after 12 years of school. Significantly more patients, however, had completed only six years of school (relative risk, 2.13), were unemployed (relative risk, 3.76), were not married (relative risk, 3.50), and did not have children (relative risk, 3.00).

CONCLUSIONS

Although the majority of patients with epilepsy in childhood are free of seizures by the time they become adults, they are at increased risk for social and educational problems. Patients whose epilepsy does not remit also have an increased risk of death.

Disability due to restrictions in childhood epilepsy

Parents and doctors impose restrictions on children with epilepsy to avoid seizure-related injuries. We intended to quantify disability due to such restrictions by using a newly developed parent-completed 10-item scale (The Hague Restrictions in Childhood Epilepsy Scale, HARCES). Parents reported disability on at least one item of the HARCES in 83% of 122 children with epilepsy and a remission from seizures for less than 1 year. Psychometric analysis of the scale's reliability demonstrated good internal consistency and retest stability. Its validity was supported by the association between HARCES scores and the physicians' advice imposing restrictions. We found no substantial association with such variables as seizure type, short-term remission, or seizure activity. These findings suggest that in children with recurrent seizures, restrictions were probably not optimally adapted to seizure-related risks. A repeat test after 1 year showed that a seizure remission of more than 1 year substantially reduced restrictions, which is probably associated with an improvement in quality of life.

Social adjustment and competence 35 years after onset of childhood epilepsy: a prospective controlled study

PURPOSE

To study the effect of childhood-onset epilepsy without other neurologic deficit on adult social adjustment and competence.

METHODS

Social competence was studied in a prospective, population-based cohort of childhood-onset epilepsy after a mean follow-up of 35 years. One hundred patients (60% of the total cohort) had no other neurologic problems ("epilepsy only"), and for each patient, two matched controls, a "random" control and an "employee" control were chosen.

RESULTS

Good social outcome was significantly reduced in the "epilepsy only" cohort compared with random controls: education [cumulative odds ratio (COR), 2.4; 95% confidence interval (CI), 1.4-4.1]; employability (COR, 7.3; 95% CI, 2.7-20.0); and marriage rate (COR, 3.7; 95% CI, 1.9-7.3). The patients with epilepsy rated their own ability to control their lives as "poor or missing" four times more frequently than the employee controls. Patients receiving antiepileptic polytherapy, but not monotherapy, were significantly less satisfied with their present life (OR, 6.7; 95% CI, 1.9-24.1) and felt their general health was significantly poorer (OR, 5.1; 95% CI, 1.2-21.3) than did the employee controls. Furthermore, patients with continuing seizures were significantly less satisfied with their present life (OR, 4.1; 95% CI, 1.1-15.1) than were employee controls.

CONCLUSIONS

Many patients with "epilepsy only" beginning in childhood have persistent and significant social-adjustment and competence problems in adulthood.

Electroclinical features of idiopathic generalised epilepsy with persisting absences in adult life

OBJECTIVES

To describe the electroclinical features of typical absences persisting in adult life.

METHODS

Twelve adult patients (aged 21 to 56 years) with idiopathic generalised epilepsy featuring typical absences as the prominent clinical feature were studied. All patients underwent a full clinical and neurophysiological investigation including ictal documentation of seizures.

RESULTS

Neurological examination and neuroradiological investigations were normal in all cases. Clinical findings included a median age at onset of absences of 14 (range 4-32) years, almost constant tonic-clonic seizures (in 83% of patients), frequent episodes of absence status (in 33% of patients), and associated cognitive or psychiatric disturbances. Interictal EEG findings showed normal background activity, generalised paroxysms of spike waves or polyspike waves, and inconstant focal spikes (in five patients); runs of polyspikes were seen during non-REM sleep. Ictal EEG findings showed generalised spike waves at 3 Hz, sometimes preceded by multiple spikes, or more complex EEG patterns with sequences of polyspikes intermingled with spike waves or polyspike waves, showing discharge fragmentation or variation of intradischarge frequency.

CONCLUSION

The results of the present study show that absences persisting in adult life may show particular clinical and EEG patterns, distinct from those in childhood or adolescence.

Altered cognitive functioning in children with idiopathic epilepsy receiving valproate monotherapy

Once a child is diagnosed with epilepsy, a primary concern is whether or not the child's behavior and cognitive abilities will be affected by the disease, by the drug prescribed for seizure control, or both. Direct cognitive effects by the epileptic condition have been described. On the other hand, cognitive effects in epilepsy have been attributed to antiepileptic drug therapy. Valproate is an antiepileptic drug of choice in managing the commonest childhood epilepsy syndromes. Although frequently prescribed in pediatric neurology practice, there have been relatively few studies investigating the cognitive effects of valproate therapy in children. Cognitive effects of valproate reported in normal adult volunteers and in adults with epilepsy cannot be generalized to the pediatric population. The results of investigations on children are less conclusive. Guidelines for antiepileptic drug trials in children have recently been formulated. Carefully designed studies are required in determining the cognitive effects of valproate in the pediatric population. Neuropsychological measures that are likely to assess subtle changes in higher brain functions crucial to learning in children should be employed. We propose a test battery to assess for cognitive changes associated with anticonvulsant therapy in children.