FREQUENTLY ASKED QUESTIONS (FAQs)
Some of the more frequently asked questions about the research studies conducted at the CADE Clinic are listed below.
EEG Study Frequently Asked Questions
What is an EEG?
An EEG, or electroencephalograph, is a process whereby through the use of sensitive electrodes, amplifiers and computers, we can record electrical activity from the brain.
Does it cause any discomfort?
The EEG procedure is totally non-invasive. All brain activity is recorded from the scalp surface via a cap. The surface of the scalp is gently abraded to remove any impurities so that the signal can be accurately recorded. It is important to note that the EEG only records electrical activity from the brain and is not able to transmit current to the subject.
What does an EEG involve?
We firstly measure the size of your scalp so we can fit the appropriate cap. As the cap contains little holes we will then push the hair aside under these holes, slightly abrade the surface and apply some rubbing alcohol. We will then apply a salt-based gel in the holes of the cap and then plug in electrodes to record activity. We take recordings whilst the subject is at rest and whilst they complete some tasks through the use of a video monitor and response pad.
How long does it take?
The whole EEG procedure typically takes 1.5 - 2 hours.
What can we find through EEG studies?
The purpose of EEG research is to investigate electrical activity in the brain which is devoted to different processes. For example, we wish to study how our emotional system behaves when we perceive human faces, and how the areas in our brain dedicated to hearing can detect differences in tones. We can investigate these processes by administering specific cognitive tests which trigger activity in the areas of interest, whilst we record EEG.
How do I participate?
We always appreciate interest in our EEG studies. If you have any queries about the EEG procedure or wish to volunteer please contact Racheal Degabriele on (02) 9926 5292 or research@cadeclinic.com.
tDCS Study Frequently Asked Questions
What is tDCS?
Transcranial direct current stimulation, or tDCS, is a technique we employ here at the department. It uses very mild electric current to modulate the brains activity.
Does tDCS cause any pain?
Electrical stimulation in this way is totally non-invasive and is applied simply with the addition of water. Some people have reported a mild tingling sensation when stimulation begins which is not painful.
What does it involve?
Electrodes are held in place using soft velcro and moistened throughout the stimulation period with some water. The whole process takes up to about half an hour for a 20 minute stimulation period. For the purposes of research study, patients will typically undergo an EEG recording before and after application of tDCS.
What can we find using tDCS?
The purpose of research in tDCS is to see how the application of mild electrical currents can assist brain activity particularly in conditions such as ischemic stroke or psychological disorders. We are particularly interested in how tDCS can be applied to assist in declarative memory and motor function in healthy individuals.
Can I be involved?
Healthy volunteers are invited to take part in our research involving tDCS. If you have any questions about the procedure or wish to volunteer please feel free to call Stephanie Norris on (02) 9926 5292 or email research@cadeclinic.com.