QEEG Brain Scans


The Perth Brain Centre uses the very latest in functional brain imaging technology known as Quantitative Electroencephalogram (QEEG) Brain Scans and 3-Dimensional Brain Mapping, using Low-resolution Electromagnetic Tomography (LORETA).

QEEG measures the electrical activity of the brain, known as “brainwaves” and then, using specialised software, compares that unique pattern to known databases of “normal” and “abnormal” patterns.

The results of this complex analysis are used to generate detailed images, known as “brain maps” which can help pin-point the areas of the brain that are not working normally. This important information is used to help develop treatment programmes and to monitor progress.

QEEG Examination

QEEG examination is safe and non-invasive and is suitable for people of almost any age. During the test patients sit comfortably whilst wearing a special “electrode cap”  containing sensors connected to specialised medical equipment. The test takes approximately 30 minutes and results are usually available within a few days.

QEEG is a measure of “brain health”

Just as a healthy heart is able to change its rate to match demands and quickly settle down to a normal resting level, a healthy brain also has the same flexibility and resilience, much like a “green reed that can bend with the wind and not break in a storm.


In other words, a brain that is functioning normally will produce the right brainwaves for the right moment and then quickly return to a stable resting state. A healthy brain does not “get stuck” in the wrong pattern of brainwave activity. So, for example it would be normal for someone to have more slow brainwaves present whilst relaxing in bed in the morning, but not if that person is trying to pay attention, remember things or make important decisions later that day. It would also be normal for someone to have more fast brainwaves present whilst very excited, but not if that person is trying to “switch off” and get to sleep that night.

QEEG measures “brain health” by accurately measuring brain flexibility and resilience. It directly and objectively tests brain function and clearly pin-points patterns of abnormal brainwave activity.


All of our thoughts and actions are the result of the activity of the 100 billion neurones in our brain.  Brainwaves are produced by the synchronised electrical activity from all these neurones.

Brainwaves are normally measured in Hertz (cycles per second) and they are often divided into Delta, Theta, Alpha, Beta and Hi-Beta bands (ranging from very slow to very fast frequencies).

Delta Brainwaves (1 to 4 Hertz)

Delta brainwaves are the slowest brainwaves and are normally present during dreamless sleep. Increased levels of Delta brainwaves at rest can be seen in cases of stroke, traumatic brain injury and in childhood developmental disorders. Decreased levels of Delta brainwaves can be seen in cases of insomnia.

Theta Brainwaves (4 to 8 Hertz)

Theta brainwaves are normally present during light sleep and when daydreaming. Increased levels of Theta brainwaves can be seen in cases of ADHD and learning disorders. Decreased levels of Theta brainwaves can be seen in cases of insomnia.

Alpha Brainwaves (8 to 12 Hertz)

Alpha brainwaves are normally present at rest, when relaxed with quiet thoughts and “in the present moment.”  Increased levels of Alpha brainwaves at rest can be seen in cases of chronic pain, depression, chronic headaches and migraines. Decreased levels of Alpha brainwaves at rest can be seen seen in cases of developmental delay and Autistic Spectrum Disorders.

Beta Brainwaves (12 to 20 Hertz)

Beta brainwaves are normally present when alert, engaged in problem-solving and with focused mental activity. Beta brainwaves are also normally present during  REM sleep (dreaming). Increased levels of Beta brainwaves at rest can be seen in cases of anxiety. Decreased levels of Beta brainwaves at rest can be seen in cases of ADHD, depression and insomnia.

Hi-Beta Brainwaves (20 to 30 Hertz)

Hi-Beta brainwaves are the fastest brainwaves and normally present during highly complex thought or excitement. Increased levels of Hi-Beta brainwaves at rest can be in cases of anxiety and insomnia. Decreased levels of Hi-Beta brainwaves can be seen in cases of depression and insomnia.



QEEG is unique within the field of neuroscience and brain-imaging. Unlike standard CT and MRI scans which provide information about brain structure, QEEG provides unique information about how the brain is working. QEEG is the only examination that directly and objectively measures brain function, precisely mapping brain activity and permitting accurate “pattern recognition”, impossible with the routine visual analysis of ordinary EEG. QEEG also differs significantly from Functional MRI (fMRI), PET and SPECT scans all of which assess brain activity indirectly by measuring blood flow, the latter two examinations also requiring the use of radioactive tracers.


QEEG is a primary tool in neuroscience and is used in research centres all over the world. It is used to study conditions including: ADHD and Learning Disorders, Alzheimer’s Disease, Anxiety and Panic Disorders, Autism (ASD), Developmental Disorders, Chronic Pain, Depression, Dizziness and Vertigo, Epilepsy, Fibromyalgia and Chronic Fatigue Syndrome, Insomnia and Sleep Disorders, Migraine and Chronic Headaches, Post-Concussion Syndrome, Traumatic Brain Injury and Stroke.

To arrange an appointment for a QEEG Brain Scan please call (08) 6500 3277 now.