Coherence Ranges

Coherence training in neurofeedback aims to either increase or decrease the synchronization of brainwave patterns between two EEG sites, depending on the clinical presentation and the needs of the individual. The "ideal" coherence values can vary based on several factors, including age, cognitive function, and individual variability. However, here are some general guidelines on coherence ranges that are often targeted in neurofeedback.

1. Frontal Coherence (e.g., F3-F4):

Generally, coherence values between 0.6 and 0.85 in the alpha range (8-12 Hz) are considered typical for adults.

Values below this range might suggest desynchronization or reduced communication between the hemispheres in the frontal region.

Elevated coherence values might suggest over-synchronization and can be linked to conditions like ADHD.

2. Temporal Coherence (e.g., T3-T4):

For the alpha range, coherence values between 0.5 and 0.8 are often considered typical.

Values outside this range might be indicative of auditory processing issues or other cognitive challenges.

3. Central Coherence (e.g., C3-C4):

For the alpha range, coherence values between 0.5 and 0.75 are generally targeted.

Aberrations might be linked to motor or sensory processing issues.

4. Parietal Coherence (e.g., P3-P4):

Typical coherence values in the alpha range are often between 0.6 and 0.85.

Deviations might relate to spatial processing or sensory integration challenges.

5. Fronto-Temporal Coherence (e.g., F3-T3, F4-T4):

In the alpha range, values between 0.5 and 0.8 are often considered typical.

This coherence can be crucial for tasks that require integration of cognitive and auditory information.

6. Fronto-Central Coherence (e.g., F3-C3, F4-C4):

For the alpha range, coherence values between 0.5 and 0.75 are generally targeted.

This coherence can be important for tasks involving cognitive and motor integration.