Electroencephalography (EEG) is a non-invasive test that measures the electrical activity of the brain. It is commonly used in medical and research settings to diagnose and monitor conditions such as epilepsy, sleep disorders, and brain injuries.

During an EEG, electrodes are placed on the scalp to measure the electrical signals generated by the brain. These signals are recorded and analysed to identify any abnormalities or patterns that may indicate a medical condition.

One of the main advantages of EEG is that it is non-invasive and does not require any injections or surgery. This makes it a safe and relatively painless way to diagnose and monitor brain activity.

EEG is also used in research settings to study brain function and activity. By analysing the electrical signals generated by the brain, researchers can gain insights into how the brain processes information and responds to different stimuli.


The main types of brainwaves detected by EEG are:

* Delta waves: Slowest frequency, typically associated with deep sleep and unconscious processes.

* Theta waves: Associated with light sleep, relaxation, and the border between conscious and unconscious states.

* Alpha waves: Linked to a relaxed, wakeful state and often seen during meditation or mindfulness practices.

* Beta waves: Higher frequency, associated with active thinking, problem-solving, and focused attention.

* Gamma waves: Fastest frequency, linked to complex cognitive processes, learning, and perception.
EEG can be used for self-help in several ways:

* Neurofeedback therapy: This therapy enables individuals to learn how to regulate their brainwave patterns, which can improve cognitive functioning, emotional regulation, and overall mental health.

* Meditation and mindfulness: By monitoring brainwave patterns during meditation or mindfulness practices, individuals can learn to enter more relaxed and focused states of consciousness.

* Research and understanding: EEG research can provide valuable insights into the neural mechanisms underlying cognitive and emotional processes, which can inform self-help strategies and interventions.
While EEG is considered a safe and non-invasive procedure, there are some limitations and considerations:

* Spatial resolution: EEG has limited spatial resolution, making it difficult to pinpoint the precise location of neural activity within the brain.

* Artifacts: External factors, such as muscle movement or electrical interference, can produce artifacts in the EEG signal, which can affect the accuracy of the results.

* Interpretation: Interpreting EEG data can be complex and requires specialised knowledge and training.

Despite these limitations, EEG remains a valuable tool for studying brain function and has applications in various mental self-help and well-being contexts.