Surgeons at UCHealth University of Colorado Hospital have performed Colorado’s first implanted brain-computer interface procedure, placing an electrode array in a 41-year-old quadriplegic patient who was paralysed from the neck down roughly a decade ago. The surgery, conducted on April 9 by Daniel Kramer, an assistant professor of neurosurgery at the CU Anschutz School of Medicine, marks the state’s entry into a clinical field that has until now been concentrated at a handful of centres on the coasts.

The procedure is notable less for being a first in a new state than for where the electrodes sit. Most implanted BCIs record from primary motor cortex, decoding signals the brain generates when a patient attempts or imagines a movement. Kramer’s team placed the device in higher-level brain areas involved in executive function, working memory, and abstract reasoning — regions that govern the planning and coordination of behaviour rather than the execution of individual movements.

Two-way capability

The implant is not limited to reading neural signals. The CU Anschutz programme is designed to send sensory information back into the brain through electrical stimulation, an approach that would allow a paralysed user to feel touch or pressure feedback from a robotic arm or prosthetic limb rather than relying solely on visual cues. Bidirectional BCIs remain rare in clinical settings; most current devices, including those from Neuralink and Blackrock Neurotech, are focused primarily on decoding outgoing motor signals.

Luke Bashford, an assistant adjunct professor working alongside Kramer, is coordinating the research side of the programme. The team is using Utah Arrays — the electrode platform that has been the workhorse of academic BCI research for over a decade — and has also begun working with Neuropixels probes, which can record approximately 300 neurons simultaneously on a single needle-thin shaft compared with the 40 to 96 captured by conventional arrays.

Broader aims

Kramer’s lab is recruiting tetraplegic patients in the Denver metro area for further implantations. The programme’s long-term interest extends beyond paralysis: by studying higher cognitive regions, the team aims to understand how the brain manages the flexible switching between thought processes that healthy cognition requires. Kramer has said this line of research could eventually inform treatment for Alzheimer’s disease, Parkinson’s, and traumatic brain injury, where the breakdown of cognitive flexibility is a central feature.

Colorado’s entry into clinical BCI work adds another surgical site to a field that has expanded rapidly over the past year. Neuralink now operates across the United States, United Kingdom, and UAE; Synchron runs trials in Australia and the US; Precision Neuroscience recently published intraoperative data from Johns Hopkins; and CorTec last week received FDA Breakthrough Device Designation for its stroke rehabilitation BCI at Harborview Medical Center. The addition of CU Anschutz — with a research programme focused on cognitive regions and sensory feedback rather than pure motor decoding — adds a distinct scientific angle to the growing clinical map.