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Definition of Links Between Non-invasives Methods and Intracerebral EEG With Simultaneous Recordings. (MEG-SEEG)

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ClinicalTrials.gov Identifier: NCT02875964
Recruitment Status : Completed
First Posted : August 23, 2016
Last Update Posted : April 12, 2019
Information provided by (Responsible Party):
Assistance Publique Hopitaux De Marseille

Brief Summary:

Presurgical evaluation of epileptic patients require a precise mapping of cerebral regions implied in epileptic discharges and in normal function.

The current practice in most cases is to implant intracerebral electrodes in order to localize these regions in a reliable manner. However, non-invasive methods have been developed in order to record brain activity with no risk for the patient.

Still, it is necessary to validate and improve the signal processing methods and the underlying models these methods in order to optimize their use in clinical practice. To do so, it is necessary to record simultaneously electroencephalogram (EEG) and magnetoencephalogram (MEG) and stereo encephalogram SEEG (intracerebral). Such simultaneous recordings will permit to confront the exact same activity recorded non-invasively at the surface of the head, and represented on the brain thanks to the model and directly within the brain.

The objective is to define the conditions under which one can represent faithfully the activity measured intracerebrally from the surface measurements.

It will be record simultaneously MEG, scalp EEG and intracerebral EEG on a series of 60 patients. It will be record resting state signals, as well as stimulation protocols. The interictal epileptic discharges will be marked on the different modalities, and evoked potentials/fields computed in response to protocols. Sensitivity of recordings to activity visible on depth recordings will be evaluated as a function of localization of brain generators. Advanced signal processing methods will be used such as source localization and independent component analysis, in order to increase sensitivity of measures.

Condition or disease Intervention/treatment Phase
Epilepsy Device: electroencephalogram Device: magnetoencephalogram Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 60 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Definition of Links Between Non-invasives Methods and Intracerebral EEG With Simultaneous Recordings.
Actual Study Start Date : October 2012
Actual Primary Completion Date : April 2019
Actual Study Completion Date : April 2019

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Epilepsy

Arm Intervention/treatment
Experimental: registration of intracerebral activity
epileptic patient receiving implantation of intracranial electrodes
Device: electroencephalogram
Implanting electrode to measure brain activity

Device: magnetoencephalogram
Implanting electrode to measure brain activity

Primary Outcome Measures :
  1. The number of epileptic discharges [ Time Frame: 60 months ]
    Measurement of epileptic activity by electroencephalogram

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

- Patients for whom implanting intracerebral electrodes is underway

Exclusion Criteria:

  • Patients minors
  • Pregnant or lactating women

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02875964

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Assistance Publique Hôpitaux de Marseille
Marseille, France, 13354
Sponsors and Collaborators
Assistance Publique Hopitaux De Marseille
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Responsible Party: Assistance Publique Hopitaux De Marseille
ClinicalTrials.gov Identifier: NCT02875964    
Other Study ID Numbers: 2012-16
2012-A00644-39 ( Registry Identifier: IDRCB )
First Posted: August 23, 2016    Key Record Dates
Last Update Posted: April 12, 2019
Last Verified: April 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Additional relevant MeSH terms:
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Brain Diseases
Central Nervous System Diseases
Nervous System Diseases