RESUMEN

OBJECTIVE: The objective of the study was to analyze preoperative visual and verbal episodic memories in a homogeneous series of patients with mesial temporal lobe epilepsy (MTLE) and unilateral hippocampal sclerosis (HS) submitted to corticoamygdalohippocampectomy and its association with neuronal cell density of each hippocampal subfield. METHODS: The hippocampi of 72 right-handed patients were collected and prepared for histopathological examination. Hippocampal sclerosis patterns were determined, and neuronal cell density was calculated. Preoperatively, two verbal and two visual memory tests (immediate and delayed recalls) were applied, and patients were divided into two groups, left and right MTLE (36/36). RESULTS: There were no statistical differences between groups regarding demographic and clinical data. Cornu Ammonis 4 (CA4) neuronal density was significantly lower in the right hippocampus compared with the left (p=0.048). The groups with HS presented different memory performance - the right HS were worse in visual memory test [Complex Rey Figure, immediate (p=0.001) and delayed (p=0.009)], but better in one verbal task [RAVLT delayed (p=0.005)]. Multiple regression analysis suggested that the verbal memory performance of the group with left HS was explained by CA1 neuronal density since both tasks were significantly influenced by CA1 [Logical Memory immediate recall (p=0.050) and Logical Memory and RAVLT delayed recalls (p=0.004 and p=0.001, respectively)]. For patients with right HS, both CA1 subfield integrity (p=0.006) and epilepsy duration (p=0.012) explained Complex Rey Figure immediate recall performance. Ultimately, epilepsy duration also explained the performance in the Complex Rey Figure delayed recall (p<0.001). SIGNIFICANCE: Cornu Ammonis 1 (CA1) hippocampal subfield was related to immediate and delayed recalls of verbal memory tests in left HS, while CA1 and epilepsy duration were associated with visual memory performance in patients with right HS.

Asunto(s)

Epilepsia del Lóbulo Temporal/complicaciones , Hipocampo/patología , Trastornos de la Memoria/etiología , Memoria Episódica , Adulto , Región CA1 Hipocampal/patología , Estudios de Casos y Controles , Recuento de Células , Epilepsia del Lóbulo Temporal/patología , Epilepsia del Lóbulo Temporal/psicología , Femenino , Humanos , Masculino , Trastornos de la Memoria/diagnóstico , Trastornos de la Memoria/patología , Persona de Mediana Edad , Neuronas/patología , Pruebas Neuropsicológicas , Esclerosis

RESUMEN

INTRODUCTION: Video-EEG has been used to characterize genetic generalized epilepsies (GGE). For best performance, sleep recording, photic stimulation, hyperventilation, and neuropsychological protocols are added to the monitoring. However, risks and benefits of these video-EEG protocols are not well established. The aim of this study was to analyze the efficacy and safety of a video-EEG neuropsychological protocol (VNPP) tailored for GGE and compare its value with that of routine EEG (R-EEG). METHODS: We reviewed the VNPP and R-EEG of patients with GGE. We considered confirmation of the clinical suspicion of a GGE syndrome and characterization of reflex traits as benefits; and falls, injuries, psychiatric and behavioral changes, generalized tonic-clonic (GTC) seizures, and status epilepticus (SE) as the main risks of the VNPP. RESULTS: The VNPPs of 113 patients were analyzed. The most common epileptic syndrome was juvenile myoclonic epilepsy (85.8%). The protocol confirmed a GGE syndrome in 97 patients and 62 had seizures. Sleep recording had a provocative effect in 51.2% of patients. The second task that showed highest efficacy was praxis (39.3%) followed by hyperventilation (31.3%). Among the risks, 1.8% had GTC seizures and another 1.8%, SE. Eighteen percent of patients had persistently normal R-EEG, 72.2% of them had discharges during VNPP. Generalized tonic-clonic seizures, myoclonic status epilepticus, and repeated seizures were the main risks of VNPP present in 6 (5.31%) patients while there were no complications during R-EEG. CONCLUSIONS: The VNPP in GGE is a useful tool in diagnosis and characterization of reflex traits, and is a safe procedure. Its use might preclude multiple R-EEG exams.

Asunto(s)

Electroencefalografía/métodos , Epilepsia Generalizada/diagnóstico , Epilepsia Generalizada/fisiopatología , Grabación en Video/métodos , Adolescente , Adulto , Anciano , Niño , Electroencefalografía/normas , Epilepsia Generalizada/genética , Femenino , Humanos , Hiperventilación/diagnóstico , Hiperventilación/fisiopatología , Masculino , Persona de Mediana Edad , Estimulación Luminosa/métodos , Sueño/fisiología , Resultado del Tratamiento , Grabación en Video/normas , Adulto Joven

RESUMEN

PURPOSE: To correlate hippocampal volumes obtained from brain structural imaging with histopathological patterns of hippocampal sclerosis (HS), in order to predict surgical outcome. METHODS: Patients with mesial temporal lobe epilepsy (MTLE) with HS were selected. Clinical data were assessed pre-operatively and surgical outcome in the first year post surgery. One block of mid hippocampal body was selected for HS classification according to ILAE criteria. NeuN-immunoreactive cell bodies were counted within hippocampal subfields, in four randomly visual fields, and cell densities were transformed into z-score values. FreeSurfer processing of 1.5T brain structural images was used for subcortical and cortical volumetric estimation of the ipsilateral hippocampus. Univariate analysis of variance and Pearson's correlation test were applied for statistical analyses. RESULTS: Sixty-two cases (31 female, 32 right HS) were included. ILAE type 1 HS was identified in 48 patients, type 2 in eight, type 3 in two, and four had no-HS. Better results regarding seizure control, i.e. ILAE 1, were achieved by patients with type 1 HS (58.3%). Patients with types 1 and 2 had smaller hippocampal volumes compared to those with no-HS (p<0.001 and p=0.004, respectively). Positive correlation was encountered between hippocampal volumes and CA1, CA3, CA4, and total estimated neuronal densities. CA2 was the only sector which did not correlate its neuronal density with hippocampal volume (p=0.390). CONCLUSION: This is the first study correlating hippocampal volume on MRI submitted to FreeSurfer processing with ILAE patterns of HS and neuronal loss within each hippocampal subfield, a fundamental finding to anticipate surgical prognosis for patients with drug-resistant MTLE and HS.

Asunto(s)

Epilepsia Refractaria/diagnóstico por imagen , Epilepsia Refractaria/cirugía , Epilepsia del Lóbulo Temporal/diagnóstico por imagen , Epilepsia del Lóbulo Temporal/cirugía , Hipocampo/diagnóstico por imagen , Hipocampo/cirugía , Adolescente , Adulto , Análisis de Varianza , Antígenos Nucleares/metabolismo , Atrofia , Recuento de Células , Epilepsia Refractaria/metabolismo , Epilepsia Refractaria/patología , Epilepsia del Lóbulo Temporal/metabolismo , Epilepsia del Lóbulo Temporal/patología , Femenino , Estudios de Seguimiento , Hipocampo/metabolismo , Hipocampo/patología , Humanos , Inmunohistoquímica , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Proteínas del Tejido Nervioso/metabolismo , Tamaño de los Órganos , Pronóstico , Esclerosis/diagnóstico por imagen , Esclerosis/metabolismo , Esclerosis/patología , Esclerosis/cirugía , Resultado del Tratamiento , Adulto Joven

Asunto(s)

Insuficiencia Cardíaca/complicaciones , Implantación de Prótesis de Válvulas Cardíacas/efectos adversos , Síndrome de las Piernas Inquietas/etiología , Anciano , Femenino , Insuficiencia Cardíaca/fisiopatología , Insuficiencia Cardíaca/cirugía , Humanos , Válvula Mitral/cirugía , Síndrome de las Piernas Inquietas/fisiopatología

Asunto(s)

Anciano , Femenino , Humanos , Insuficiencia Cardíaca/complicaciones , Implantación de Prótesis de Válvulas Cardíacas/efectos adversos , Síndrome de las Piernas Inquietas/etiología , Insuficiencia Cardíaca/fisiopatología , Insuficiencia Cardíaca/cirugía , Válvula Mitral/cirugía , Síndrome de las Piernas Inquietas/fisiopatología

RESUMEN

A síndrome das pernas inquietas é uma neuropatia causadora de relevante deterioração da qualidade devida nos pacientes acometidos. É conhecida desde a década de 40, mas somente nos últimos anos tem sidoamplamente investigada. Trabalhos recentes têm apontado a importância da história familiar na incidência eno prognóstico da doença, e alguns genes envolvidos já foram identificados. Embora a fisiopatogenia não estejatotalmente elucidada, sabe-se que deficiência de ferro e alterações das vias dopaminérgicas são a basepara o desenvolvimento do quadro. A síndrome das pernas inquietas é caracterizada por sintomas subjetivosde desconforto, principalmente em membros inferiores, acompanhada da urgência em movimentar as regiõesacometidas com relativa atenuação dos sintomas com a movimentação. Por se manifestar predominantementeao fim do dia, nos períodos de repouso e inatividade, o quadro resulta em má qualidade do sono e sonolênciaexcessiva diurna. A gravidade desse quadro é amplamente variável no tempo e no espaço. O diagnóstico éessencialmente clínico. As investigações laboratoriais geralmente são usadas para confirmação da causa. Asopções terapêuticas mostram os agentes dopaminérgicos como a classe mais eficiente de medicamentos, masse podem incluir opiáceos ou benzodiazepínicos em certos casos. Há muitas questões a respeito do mecanismoe do tratamento da síndrome das pernas inquietas, que demandam estudos mais consistentes

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The restless legs syndrome is a neurological disorder responsible for reduced quality of life secondary to sleep deterioration. It has been described in the 40?s, but only recently more extensively investigated. The role playedby familiar history has only recently been identified with the determination of some possibly implicated genes.Although its physiopathology has not yet been completely elucidated, it seems possible that iron metabolism anddopaminergic mechanisms form the physiologic basis for understanding this disorder temporal development. Themain features of restless legs syndrome are urging to move the limbs often associated to subjective discomfortsensations, improved by moving or fidgeting. There is a circadian worsening with the symptoms increasing duringthe day and with inactivity, not uncommonly resulting in a bad sleep?s night and daytime sleepiness. The severityof restless legs syndrome symptoms varies in time and space. The diagnostic is essentially clinical. Laboratorywork up is mostly used for etiological confirmation. Therapeutic options show dopaminergic agents as the mostefficient drug class, but it can also include opiates or benzodiazepines in certain cases. There are many openquestions concerning restless legs syndrome mechanisms and treatment options that need to be addressed byconsistent research trials.