fMRI experiment on force perception

Denna studie är avslutad och tar tyvärr inte emot flera anmälningar!
Hi! We are conducting an fMRI study on force perception. Please read below for details.

1. What is fMRI
This study will involve the use of functional Magnetic Resonance Imaging (fMRI), a technique commonly employed in research settings to investigate which brain regions are involved in particular behavioural functions. FMRI is non-invasive and does not use any radiation (unlike x-ray). It involves lying on a scanning table, which slides into a ‘tube’ where a very strong magnetic field is applied. Short radio wave transmissions and pulsations of magnetic fields are then used to obtain a picture of the structure and function of your brain.
The fMRI scanning session will involve a series of steps. Upon arrival at the MR-Scanner at Solna Hospital, you will be asked to fill in a standard safety-screening questionnaire. This is done to assure that you have no health concerns, or any magnetic material that is permanently fixed to your body (such as a cardiac pacemaker, metal plates or screws), which would make it unsafe for you to enter the scanner. You will also need to remove any metallic objects (such as watches, keys, chains, hair pins, glasses, jewelry, coins, etc.), items with magnetic data (credit cards), and you will need to change into a hospital gown before entering the scanner. Your clothes and all of your belongings will be safely stored in a locker.

Once we have ensured that there are no contraindications and that all magnetic material is removed, we will proceed with the scanning session. You will be lying on the scanning table for about 180 minutes (3 hours). The scanning time however will be 90 minutes in total (1,5 hour). The reason you will be lying on the table for the extra time is because we will do some behavioural tasks between the scanning sessions. At the middle of the experiment, we will make a break and we will take you out of the scanner so you can stretch your body. Inside the scanner, there will be an intercom that allows you to communicate with the researchers at any time.

2. Who is eligible
A. To participate in the study you need first to be MRI eligible.
People that cannot perform the study are the ones that
have cardiac pacemakers, aneurysm clip, cochlear implants, shrapnel, history of metal fragments in eyes, neurostimulators, claustrophobia
are pregnant
with drug or alcohol abuse
with history of skeletomuscular neck problems.

If you contact me I will send you a safety form.

B. If you are eligible for MRI, we are looking for 30 male and female healthy participants
between 18-50 years of age
without any history of neuropsychiatric disease
not using neuroactive drugs

3. What you will do
The experiment has two parts: the fMRI part that we will do in the Karolinska hospital and the behavioural part that we will do in Karolinska Institute (Biomedicum) in a different day.

fMRI part. During the fMRI scans, you will hear a “beep”, you will be asked to press a sensor with your right index finger and you will receive a force on your left index finger. During the rest of the time, you will keep lying on the scanner table (but without being scanned), you will hear a “beep" you will be asked to press a sensor with your right index finger and you will receive two forces on your left index finger. We will ask you to tell us which was stronger: the first or the second.
The forces are very weak and not painful.

Behavioural part. During the behavioural part, you will be sitting on a chair with your hands on the table. You will receive a force on your left index finger and you will be asked to simply reproduce it by pressing with your right index finger.

4. How long it will take
The fMRI part (Karolinska hospital) will take 3.5 hours in total. This means that you will be lying inside the scanner for 3 hours (we will make a short break in the middle and remove you from the scanner as mentioned above). The scanning per se however will take 1.5 hours.

The behavioural part (Karolinska Institute) will be on a different day and it will take 30 minutes.

5. What will be your compensation
To participate in the study, you need to do both fMRI + behavioural session. That is, you cannot perform only one of the two.
For your total participation you will receive 1050 sek + an image of your brain + 1 cinema ticket.
To get your compensation you need to have a Swedish personnummer. If not, we cannot pay you. Temporary personal numbers are not valid.

If interested, contact me and I will let you know the available days and times!


Upplagd: 19/07-18. Senast ändrad: 19/08-18. Ansvarig för studien och informationen på denna sida är Konstantina Kilteni.