The Science of HALO

The Prefrontal Cortex and Conscious Logic

At the heart of human awareness lies the prefrontal cortex (PFC) — the executive seat of cognition, reasoning, and higher-order decision-making. It is the area most directly linked to the sense of “I,” the conscious observer. The HALO wearable targets this region through non-invasive surface electrodes that gently monitor prefrontal EEG signals at sites Fp1, Fp2, and Fpz.

These positions provide a direct line to the neural rhythms associated with attention, focus, and moral reasoning — functions that define our capacity to act consciously rather than react instinctively. By mapping fluctuations in prefrontal activity, HALO interprets the subtle oscillations between logical thought and emotional context, forming the foundation for a new kind of brain–machine partnership.

Rather than replacing human decision-making, HALO amplifies the brain’s natural regulatory loop — the system that governs how we weigh options, imagine outcomes, and align choices with intention. In this sense, HALO becomes not a computer interface, but a conscious logic amplifier that refines perception itself.

EEG and Multimodal Biosignal Integration

While EEG (electroencephalography) remains the core of HALO’s neural sensing layer, it operates as part of a multimodal biosignal array designed to interpret the full complexity of the human state. Integrated PPG (photoplethysmography) sensors monitor blood-flow variance linked to stress and focus, while EDA (electrodermal activity) channels detect emotional arousal through micro-changes in skin conductivity.

IMU sensors provide real-time context of head position and posture, correlating mental and physical states. This synthesis allows HALO’s AI to differentiate between a true cognitive overload and a physical distraction, creating context-aware neurofeedback that responds to the individual’s holistic physiology.

By combining these inputs through signal fusion algorithms, HALO achieves a bio-harmonic understanding of the user — a system where each biometric contributes to an evolving model of consciousness, tuned to restore equilibrium when the mind drifts from coherence.

Non-Invasive Neuromodulation and Feedback Loops

HALO employs closed-loop neurofeedback to help the brain self-optimize without external control. Instead of forcing stimulation, HALO mirrors your neural activity back to you through sound, light, or vibration, creating a form of bio-resonance training.

When the system detects fragmented focus or emotional dissonance, it introduces subtle cues — a tone aligned to 432 Hz, a soft visual pulse, or a harmonic vibration — that entrain the user’s attention toward calm coherence. In advanced prototypes, HALO + models will enable optional, clinician-gated transcranial electrical stimulation (tES) with current limits safely below 2 mA, facilitating faster alignment of neural circuits responsible for sustained attention.

Every feedback loop operates within strict safety and ethical parameters, ensuring the user remains in full cognitive control. Over time, these loops train the brain to sustain balance independently, making HALO less a tool and more a mirror of conscious evolution.