Development and Test of a Headset for BCI Until Obtaining an Efficient and Comfortable System That Can be Used in Daily Practice by ALS People

Study Overview
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Brief Summary
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Brain-computer interfaces (BCIs) are computer-based systems that acquire brain signals, analyze them, and translate them into commands that are relayed to an output device to carry out a desired action. BCIs represent a very active and promising field of research among devices for people with severe motor disabilities. As the currently available systems correspond to research prototypes, they are not adapted to daily live situations. On the other hand, some systems have recently been commercialized, principally for video games but they are not satisfactory for use as a substitute technology in disability. A BCI's prototype for alternative communication using a virtual keyboard, the P300 Speller, has been developed by the National Institute for Research in Digital Science and Technology (Athena team - Nice University). This prototype includes an EEG-cap with gel based active electrodes. A recent study conducted on 20 patients with ALS (University Hospital, Nice) demonstrated the usability of the system and the patient satisfaction concerning the ease of use and utility. To achieve a system that can be used in daily live in severely disabled patients, technical developments are necessary. The investigators have conceptualized and developed an ergonomic, comfortable, headset, including dry electrodes to allow a prolonged use of the system. The purpose of the study conducted all along the development of the headset is to improve the developed system until a successful system is achieved. This study is a monocentric usability study conducted on ALS people.

Official Title
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Brain Computer Interface Prototype Development for Assisted Alternative Communication in ALS

Conditions
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Amyotrophic Lateral Sclerosis, Motor Neuron Disease, Spinal Cord Diseases, Alternative Communication Devices, Neurodegenerative Diseases, Nervous System Diseases, Neuromuscular Diseases

Intervention / Treatment
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* Device: New headset prototype


Participation Criteria
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Eligibility Criteria
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Inclusion criteria Age ≥ 18 years old For women of childbearing potential, use of contraception for the duration of the study Diagnosis of suspected ALS, possible, probable with ENMG, probable, defined according to the criteria of the World Federation of Neurology (revised El Escorial criteria, Airlie House Conference 1998) Understanding of the objective of the study after describing the principle of the P300 Speller and the course of the study Ability to follow the study procedure and to comply with the schedule of visits when entering the study Expression of a P300 wave under the conditions of the study Exclusion criteria Psychiatric illness or dementia that may interfere with the patient's ability to follow study procedures History of photosensitive epilepsy Patient subject to protective measures Non-correctable visual disturbances Limited ability to concentrate. Women who are pregnant or breastfeeding or who have planned a pregnancy during the course of the study. Persons deprived of their liberty by a judicial or administrative decision

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: ALS people with severe disability<br> | Device: New headset prototype<br>* creation of a new headset prototype for using the P300 Speller, comfortable to use in everyday life by people with disabilities.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| prototype set-up time | The time for setting up the prototype will be defined in seconds by the time elapsed between the start and stop of the stopwatch, the installation sequence being defined as follows: start of the stopwatch: patient seated, equipment positioned on the table patient or caregiver (depending on the patient's motor skills; 1 person): takes the prototype and positions it on the (patient's) skull stopwatch stop: when the prototype is set up ready to operate | at 6 months | 
| Quality of the impedance of each electrode | The quality will be considered satisfactory if the impedance value of each of the electrodes is ≤ 1 000 kOhm, according to literature data. | at 6 months | 
| Number of errors during calibration | The number of errors in copying the 10 letters during the calibration phase will be counted. | at 6 months | 
| Patient/caregiver satisfaction | The evaluation of patient and caregiver satisfaction will be carried out using visual analogue scales (VAS rated from 0 to 10) on their feelings (patient/caregiver) of use. | at 6 months |