For this study, 6- to 12-year-old children with and without DCD will plan a computer drawing game while we record their brain activity using electroencephalography (EEG). We will also use magnetic resonance imaging (MRI) to measure the size of different brain areas and the function of brain networks. This study requires two appointmentments: one at the University of Maryland (~4 hours) and one at Georgetown University Medical Center (~1 hour). Children will receive $50 for their participation and pictues of their brain. Below are the details for the EEG and MRI set up and procedures.

Electroencephalography (EEG)

First, your child will be fitted for a special electrode cap, similar to a swim cap, that will be placed on his or her head. This cap is used to measure the small electrical activity generated by your child’s brain by use of an array of sensors embedded within the cap. In order to achieve a proper fit, measures of the circumference of your child’s head will be taken as shown in the pictures below.

Next, your child’s skin will also be lightly rubbed at each skin sensor on the electrode cap with the flat wooden end of a q-tip. Special care will be taken to ensure that the skin on your child’s scalp is not irritated. The purpose of this step is to gently move the hair away from the sensors so as to allow more direct contact between the skin and the electrodes.

Last, we will use a plastic syringe (no needles are involved) to apply Food & Drug Administration (FDA) approved non-toxic conducting gel into each sensor. This gel enables a continuous connection between each sensor and the skin of the scalp in the event of small displacements of the head throughout the experiment. One a good connection is obtained we will record your child's brain activity while he/she sits quietly with his/her eyes open, closed, and during the computer task.

Magnetic Resonance Imaging (MRI)

MRI scanning will take place at the Center for Functional and Molecular Imaging (CFMI ) at Georgetown University Medical Center. We will use an MRI scanner with a very powerful magnet, the strength of which is 3 Tesla. During the scanning your child will be asked to lie on a long narrow bed for about 30 minutes while the machine gathers information about the structure of your child's brain. This is a completely non-invasive process; however, during the scanning your child will be exposed a magnetic field and radiowaves that will not be felt by your child. There will be loud repetitive tapping noises and your child will be required to wear headphones to reduce the noise.

During the scanning, your child must lie still and may sleep, listen to music, or watch a video. Your child may take breaks at any time during the MRI scanning by asking one of the researchers. All researchers will make every effort to assure your child is safe and comfortable.