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| − | == '''How to set up BCI instruments''' ==
| + | Visto che i progetti si stanno differenziando e che è necessario avere per ognuno una pagina nella sezione ongoing projects di questa pagina [[Brain-Computer Interface]] proporrei di togliere il template di progetto a questa pagina e lasciare solo una descrizione generale di Motor Imagery, magari linkando i progetti correlati. Che ne dite? |
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| − | You’ll nedd:
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| − | - Electroencephalograph (with PCMCIA connector)
| + | P.S. la parte sul setup degli elettrodi e del sw l'ho spostata nella sezione how to di [[Brain-Computer Interface]] perchè sono comunque informazioni generali che non riguardano in modo specifico Motor Imagery |
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| − | - Laptop (ensures that the AC adapter is NOT connected, for safety reasons)
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| − | - Electrodes or an Electrodes Cap (designed for the 10-20 system)
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| − | - Conductive gel
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| − | - Tape measure
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| − | - Adhesive tape
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| − | - Syringe
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| − | - Cotton fioc
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| − | - Abrasive electrode-gel
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| − | Before starting, be sure that the Electroencephalograph AC adapter is far away from the patient because 50Hz can interfere and destroy EEG signal. Don’t forget also to switch-off your mobile phone.
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| − | Now you can choose if you want to use an electrodes cap, or separated electrodes.
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| − | '''''Electrodes Cap''''' | + | |
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| − | Choose the suitable size for the patient, and then put the cap on his head in the correct position:
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| − | - measure his head size (from the nasion NS to the ….) this is the 100% of the measure
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| − | - now you can put the CZ electrode at 50% of the entire measure, and check the positions of the other electrodes.
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| − | - fill in the electrodes with conductive gel (use the syringe), take care that hair don’t disturb the skin-electrode contact.
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| − | - connect the cable to the Electroencephalograph.
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| − | '''''Separeted electrodes'''''
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| − | If you haven’t got an electrodes cap you can position them one by one following this figure, with the relatives measures of each electrode:
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| − | [[Image:10-20System.jpg]]
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| − | Connect the reference electrode to the forehead and the GND electrode to the right earlobe.
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| − | Before connecting one electrode, put a little bit of abrasive gel on a cotton fioc and scratch the portion of patient’s skin where you’ll put the electrode.
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| − | Fill in the electrode with a little bit of conductive gel, and put it on the skin, in the correct position.
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| − | Fix the cable with adhesive tape, and connect it to the Electroencephalograph.
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| − | ----
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| − | If you want to eliminate EOG artefacts from your data acquisitions, you would record EOG signal putting 2 more electrodes, near the patient eye.
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| − | One electrode just over the eyebrow and one under the eye (REF) , like in the figure:
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| − | FIGURA elettrodi occhi
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| − | Connect the EOG cables to the A-Channel of the Electroencephalograph.
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| − | Now you can start Galileo Software and check if the correct values of impedance are measured.
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| − | Click on the button “OHMMETER” in the upper toolbar, and the system will display the calculated value for each electrode, both in “graphical” form and in “numerical” one.
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| − | Values under 10 KOhm are acceptable, values under 5 KOhm are very good.
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| − | If your values aren’t under 10KOhm try to decrease them, filling the electrodes with more conductive gel until you reach acceptable values.
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Visto che i progetti si stanno differenziando e che è necessario avere per ognuno una pagina nella sezione ongoing projects di questa pagina Brain-Computer Interface proporrei di togliere il template di progetto a questa pagina e lasciare solo una descrizione generale di Motor Imagery, magari linkando i progetti correlati. Che ne dite?
P.S. la parte sul setup degli elettrodi e del sw l'ho spostata nella sezione how to di Brain-Computer Interface perchè sono comunque informazioni generali che non riguardano in modo specifico Motor Imagery
