Before starting a session in the Mind Mirror App, signal quality is essential. Neurofeedback only works when the data coming from the brain is reliable. If the signal is poor, the app may be responding to noise, muscle tension, or faulty contact rather than to your actual brain activity.
What “Good Signal Quality” Means
Signal quality reflects how well the EEG electrodes are making contact with the scalp. In the Mind Mirror system, optimal signal quality is indicated by green lights, meaning that nearly all data is being transmitted correctly. Lower values indicate dropouts, poor contact, or interference
The system continuously monitors:
Signal Quality – quality of electrode–scalp contact
Activity – muscle tension or movement that can distort the EEG
50/60 Hz Noise – electrical interference from the environment
All indicators need to be in the “green” zone before a session begins
Why This Matters for Your Training
EEG signals are extremely subtle. Muscle activity can be ten times stronger than EEG and can easily overwhelm brain signals if you move, tense your jaw, or hold tension in the neck and shoulders
Similarly, poor electrode contact, often caused by hair obstructing the sensor or worn electrodes, can result in distorted or ‘railing’ signals that do not reflect real brain activity
If signal quality is low, the app may still show patterns, but what you see is no longer a reliable reflection of your brain and state of consciousness. This means:
Feedback becomes less meaningful
Training effects are diluted or misleading
Progress is harder to interpret
What the App Helps You Check Before You Begin
Before starting a session, the system allows you to:
Verify that all signal indicators are green
Detect and correct electrical interference
Adjust electrode placement or contact if needed
Training the Brain, Not the Noise
Taking a moment to check signal quality is not a technical detail; it is a foundational part of effective neurofeedback. Clean data ensures that:
The feedback truly reflects your brain activity
Changes you observe are meaningful
Training supports genuine self-regulation
In Short
Before you begin a session in the Mind Mirror App, check your signal quality first.
Clear signals create clear feedback, and clear feedback is what allows your brain to learn, adapt, and regulate itself effectively.
For more background on how neurofeedback works, see the article What Is Neurofeedback?