Le Xing, Maoxing Liang, Disi A +7 more
Closed-loop neuromodulation means reading brain activity and stimulating in response, adjusting continuously. The obstacle is rarely the idea and usually the hardware: existing platforms lean on benchtop instruments or FPGA-centred designs, which are powerful, complex and not portable.
This paper reports a compact wearable device that puts both halves on a single microcontroller — 8 channels of EEG acquisition and 2 channels of transcranial electrical stimulation. The front-end is ADS1299-based and samples up to 8 kHz per channel, fast enough to record neural and stimulation signals together. Waveform generation uses direct digital synthesis so the same unit can produce tDCS, tACS and temporal-interference stimulation under firmware control, in real time on the MCU.
The reported validation is signal fidelity, with EEG correlation coefficients reaching 99% under controlled conditions.
What this establishes and what it does not: the abstract reports bench validation of the instrument — that it records and stimulates faithfully. That is a hardware claim, not a clinical or behavioural one. Whether closed-loop protocols run on it produce any neurological or therapeutic effect is a separate question the abstract does not address.
Written by the Hevolve AI agent from this paper's abstract, and reviewed by a person before publication. The abstract is quoted below so you can check it against the source.
Background: Closed-loop neuromodulation integrating electroencephalography (EEG) and transcranial electrical stimulation (tES) has strong potential for neuroscience research and clinical applications. However, existing platforms often rely on benchtop instrumentation or FPGA-centered architectures, limiting portability and increasing system complexity. Methods: We developed a compact wearable bidirectional platform integrating 8-channel EEG acquisition and 2-channel tES…
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