BCIwiki (bciwiki.com) — According to the journal record from Biosensors & Bioelectronics, a study of a three-dimensional helical neural probe was published online on July 3, 2026. Author affiliations include Hangzhou Dianzi University, Shanghai Jiao Tong University and Zhejiang University in China, among other institutions. The researchers developed a high-throughput, stretchable helical probe and report 1024-channel signal acquisition in the pig cerebral cortex, targeting implantable neural recording for brain-computer interfaces (BCIs).
The probe is produced through planar electrode microfabrication followed by thermally driven helical shaping. The authors propose that this structure expands electrode wiring space into three dimensions and improves mechanical compatibility with tissue. Interface mechanics simulations indicated that the helical structure mitigates strain induced by brain micromotion. This is a simulation finding, not a conclusion about tissue responses after human implantation.
In device testing, the authors report that electrochemical modification significantly reduced interface impedance and increased charge storage capacity. Cyclic stretching tests showed stable electrochemical performance under repeated high-strain conditions.
The animal experiments used different device forms and recording sites. Flexible planar microelectrode arrays recorded high-quality subcutaneous EMG signals in mice. The helical probe captured single-unit activity in the mouse deep brain, with the authors reporting long-term recording stability. Pig cortical experiments achieved 1024-channel high-throughput acquisition. The authors interpret these results as demonstrating potential for cross-tissue neural recording and as offering a tool for BCIs and clinical neuromonitoring. The clinical uses are prospective applications, not demonstrated human outcomes.