On the day of your MEG
- Wear loose, comfortable clothing. The metal in underwire bras interferes with the recording. Women, if you can, please wear a bar that does not have an underwire.
- Have regular meals, and please follow your physician’s instructions regarding your medication.
- Please refrain from alcoholic beverages (more than one drink) and recreational drugs for 24 hours before your MEG.
- Please refrain from anything containing caffeine (for example, coffee, tea, gum) for 24 hours before your MEG.
- Please do not wear make-up or use hair spray.
- Magnetic objects interfere with the MEG measurements, so you will be asked to remove all metal items, such as jewelry, watch, belt, hair-pins, hearing aids, underwire bra, and dentures.
- Please turn off any implanted stimulator about four hours before your scan, unless it is medically necessary. Please consult your physician.
What to expect when you come to the MEG lab
Before the MEG Recording: You will be asked to fill out a set of forms including an Informed Consent Form that explains why we asking you to participate in our study.
A videotape eraser will be moved over your head to erase magnetic activity from fillings in your teeth. One miniature coil will be taped to your forehead and two other coils will be attached just in front of your ears. These will be used to mark the location of your head during the MEG.
If we do not have an MRI scheduled for you, we will record the shape of your head by moving a small device (that looks like a pen) over the surface of your head. After your head shape has been recorded in the computer, you will be ready for the MEG recording.
The MEG Recording: You will be asked to sit in an MEG chair (See photo). The back of the chair will be adjusted until you are comfortable. The seat will then be slowly raised into the helmet of the MEG that contains the sensors. The chair will be raised until you can feel your hair touching the top of the helmet. When you are comfortable, the chair position will be locked so that it does not move during the recording.
You may have a friend or family member stay in the recording room with you, if you like.
When you are ready the door to the recording room will be closed. There is a microphone in the room so you can talk to the person making the MEG recording whenever you like. There is a speaker in the room, so we can talk to you as well.
During the recording it is very important that you keep your head as still as possible. Thus you may want to wear one of the knit hats we have, or bring your own. This will make it easier to keep your head still.
The length of the MEG recording will vary depending on the study. Some of our studies include sensory stimulation. In this case, you may be asked to wear earplugs that channel sounds, be shown pictures or a video, or have a small vibrating device attached to one of your fingers.
Just for Children: We have special accommodations for children. We encourage you to bring a knit hat that you wear in the winter so that you will be more comfortable. Also, a family member may stay in the recording chamber with you during the MEG. You can bring a toy into the MEG room with you as long as it does not contain any metal.
After the MEG Recording: After the session, the chair will be lowered, the three small coils will be removed and you will leave the MEG room are then free to go home.
If you are a patient, we will review the information and report the results to your referring doctor if you give us written permission to do this.