Infra-Low Frequency (ILF) Neurofeedback is a form of neurofeedback designed to support the brain’s inherent capacity for self-regulation. Rather than asking an individual to consciously change their brain activity or rewarding the production of a predetermined brainwave pattern, ILF provides the nervous system with continuous, moment-to-moment information derived from its own activity.

During training, EEG signals are measured through sensors placed on the scalp. This information is incorporated into feedback that continuously reflects changes occurring within the nervous system. The individual does not need to understand, interpret, or intentionally control the feedback. Instead, the brain is given an opportunity to respond to information about its own ongoing activity and make adjustments from within.

This is why ILF is better understood through the framework of endogenous neuromodulation. The clinician is not teaching the brain what state it should produce. Rather, the training provides information that allows the nervous system to reorganize and refine its own regulatory processes.

This distinction is important. ILF training is not primarily an operant-conditioning model in which specific EEG amplitudes are consciously or behaviourally reinforced according to predetermined thresholds. The emphasis is instead on facilitating the nervous system’s intrinsic regulatory capacity.

Dysregulation can appear in many forms, including difficulties with arousal, emotional stability, attention, sleep, physiological activation, and stress responsivity. From an ILF perspective, these presentations may reflect difficulties in the brain’s ability to dynamically organize and regulate its activity. Training therefore targets the underlying regulatory system rather than simply attempting to suppress an individual symptom.

ILF is also highly individualized. Sensor placement and training frequency are selected according to the individual’s presentation and, importantly, their response to training. The clinician continually observes changes in symptoms, arousal, sleep, emotional regulation, and overall functioning and adjusts the training accordingly. The optimal training frequency is therefore discovered through the clinical process rather than prescribed solely on the basis of a diagnosis.

Ultimately, the nervous system itself is responsible for the adaptation that occurs. ILF provides information; the brain determines what to do with it. Over repeated sessions, this process may support increasingly stable and flexible self-regulation.