Estudio de grabación cerebral directa y estimulación para la mejora de la memoria
Un estudio de grabación cerebral directa y estimulación para mejorar la memoria
Background:
- Epilepsy is a seizure disorder. Sometimes it is treated with surgery. During surgery, electrodes are placed on or in the brain. Researchers want to learn more about memory and the brain. They want to do tests on people who are having epilepsy surgery.
Objective:
- To learn more about memory and brain function by recording brain cell activity during memory tasks.
Eligibility:
- Adults age 18 - 65 who have medically intractable epilepsy and will have electrodes placed to identify the source of their seizures. They must be currently enrolled in protocol 11-N-0051.
Design:
- Participants may do memory tests before the electrodes are put in, while they are in place, and after surgery. Researchers may stimulate areas of the brain with small pulses of electricity.
- Researchers will start recording brain activity at least 12 hours after electrodes are placed. They will record while participants are awake and asleep. They will record before, during, and after seizures.
- Participants may have up to 3 testing sessions daily over the 1-3 weeks the electrodes are in place. Each session will last 20-60 minutes.
- Participants will play games on a laptop. Sometimes they may use a button or joystick. This can be done in bed in the hospital.
- Participants may be given a list of words and asked to recall them in a short time.
- Participants may be given pairs of items and asked to remember how they are related.
- Participants may be asked to learn their way around a virtual town on the computer. Their eye movements may be tracked by a small camera.
Descripción general del estudio
Estado
Condiciones
Descripción detallada
Objective
The primary objectives of this study are (1) to identify biomarkers of successful memory encoding and retrieval, and (2) to identify brain regions that can be stimulated to affect memory performance. The secondary objective is to identify biomarkers that can be used to predict cognitive impairment following resection surgery.
Study Population
One hundred (100) adult subjects with epilepsy who are enrolled in 11-N-0051 Epilepsy Surgery protocol.
Study Design
We plan to enroll individuals with drug resistant epilepsy who are enrolled in a separate protocol, 11-N-0051 Epilepsy Surgery, and who will undergo a neurosurgical procedure in which seizure activity and cognitive functions are mapped using intracranial electrodes in order to guide resection of seizure generating tissue. In this procedure, surgeons place electrodes solely based on clinical consideration with the goal of identifying the seizure focus (or foci) and also for purposes of functional mapping using electrical stimulation.
We propose to administer computerized memory tasks during the intracranial EEG monitoring period. Memory testing may also occur during other patient visits for protocol 11-N-0051. This testing may occur during a pre-surgical outpatient visit or during Phase 1 (pre-implantation) monitoring, to establish baseline memory performance, or after the resection surgery, to identify potential changes in memory performance due to the resection. All testing associated with this protocol will be done during visits or hospitalizations for 11-N-0051, and this protocol involves no additional study visits.
Some memory test sessions will include low-intensity electrical stimulation of the brain using the intracranial electrodes. During these sessions, brain stimulation trials will be interleaved with non- stimulation trials in a randomized fashion.
EEG recordings will be retrospectively analyzed for the presence of biomarkers that correlate with successful memory performance, and test performance will be compared between the stimulation and no-stimulation conditions.
The studies described here are voluntary and for research purpose only. They will not interfere with the clinical evaluation or decision-making process for epilepsy surgery.
Outcome Measures
The primary outcomes are (1) to identify biomarkers of successful memory encoding and retrieval, and (2) to identify brain regions that can be stimulated to affect memory performance. The secondary outcome is to identify biomarkers that can be used to predict cognitive impairment following resection surgery.
Tipo de estudio
Inscripción (Estimado)
Contactos y Ubicaciones
Ubicaciones de estudio
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Maryland
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Bethesda, Maryland, Estados Unidos, 20892
- National Institutes of Health Clinical Center
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Método de muestreo
Población de estudio
Patients who are considered for this protocol are those with medically intractable epilepsy and currently enrolled in 11-N-0051 Epilepsy Surgery. The patient population for this study is restricted to patients with medically intractable epilepsy because they require surgery for their condition. All participants in this study will require invasive monitoring as part of a clinical evaluation that may lead to subsequent resection of an epileptogenic focus. Enrollment will be equitable among those individuals who meet the inclusion criteria and will not be based on race, ethnicity, or gender.
Descripción
- INCLUSION CRITERIA:
To be eligible for entry into the study, candidates must meet all the following criteria:
- Be enrolled in 11-N-0051 Epilepsy Surgery.
- Able to give informed consent.
- Age greater than or equal to 18 years and less than or equal to 65 years
EXCLUSION CRITERIA:
Candidates will be excluded if they:
-Have any disability that would limit their ability to perform study tasks that examine memory function.
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Modelos observacionales: COHORT
- Perspectivas temporales: PROSPECTIVE
Cohortes e Intervenciones
Grupo / Cohorte |
|---|
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Patients
Patients age >18 years and <= 65 years enrolled in 11-N-0051 Epilepsy Surgery |
¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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to identify biomarkers of successful memory encoding and retrieval
Periodo de tiempo: during visits/hospitalizations for 11-N-0051
|
We will compare brain recordings during memory encoding for items that are later recalled versus items that are not later recalled. For example, broadband oscillatory activity from electrodes in human temporal lobe has been shown to predict which items are later recalled |
during visits/hospitalizations for 11-N-0051
|
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to identify brain regions that can be stimulated to enhance memory performance
Periodo de tiempo: during visits/hospitalizations for 11-N-0051
|
We will correlate task performance across a variety of memory tasks and electrode locations with stimulation parameters (e.g. frequency and amplitude), to identify those brain areas and stimulation parameters that increase task performance. |
during visits/hospitalizations for 11-N-0051
|
Medidas de resultado secundarias
Medida de resultado |
Periodo de tiempo |
|---|---|
|
identificar biomarcadores que puedan usarse para predecir el deterioro cognitivo después de la cirugía de resección
Periodo de tiempo: En curso
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En curso
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Colaboradores e Investigadores
Investigadores
- Investigador principal: Kareem A Zaghloul, M.D., National Institute of Neurological Disorders and Stroke (NINDS)
Publicaciones y enlaces útiles
Enlaces Útiles
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Finalización primaria (Estimado)
Finalización del estudio (Estimado)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- 150081
- 15-N-0081
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Descripción del plan IPD
We do plan to share IPD. We will share all IPD that results in a publication on a public repository, as required by most journals. The data will be de-identified and anonymized.
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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