Publication

Bind: A Bimanual Neural Discriminator-Decoder for Accurate Two-Hand Trajectory Prediction in Brain-Computer Interfaces

2025

Abstract

Decoding bimanual hand movements from intracortical recordings remains a critical challenge for brain-computer interfaces (BCIs), due to overlapping neural representations and nonlinear interlimb interactions. We introduce BiND (Bimanual Neural Discriminator-Decoder), a twostage model that first classifies motion type (unimanual left, unimanual right, or bimanual) and then uses specialized GRUbased decoders-augmented with a trial-relative time index-to predict continuous 2D hand velocities. We benchmark BiND against six state-of-the-art models (SVR, XGBoost, FNN, CNN, Transformer, GRU) on a publicly available 13-session intracortical dataset from a tetraplegic patient. BiND achieves a mean R2 of 0.76(±0.01) for unimanual and 0.69(±0.03) for bimanual trajectory prediction, surpassing the next-best model (GRU) by +2% in both tasks. It also demonstrates greater robustness to session variability than all other benchmarked models, with accuracy improvements of up to 4% compared to GRU in crosssession analyses. This highlights the effectiveness of task-aware discrimination and temporal modeling in enhancing bimanual decoding.

Official source

https://infoscience.epfl.ch/entities/publication/3f7b924f-ad39-436b-9ac9-a1576eacf1b6

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2025

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/3f7b924f-ad39-436b-9ac9-a1576eacf1b6

About this result

Related concepts (29)

Brain–computer interface

A brain–computer interface (BCI), sometimes called a brain–machine interface (BMI) or smartbrain, is a direct communication pathway between the brain's electrical activity and an external device, most commonly a computer or robotic limb. BCIs are often directed at researching, mapping, assisting, augmenting, or repairing human cognitive or sensory-motor functions. They are often conceptualized as a human–machine interface that skips the intermediary component of the physical movement of body parts, although they also raise the possibility of the erasure of the discreteness of brain and machine.

Brain implant

Brain implants, often referred to as neural implants, are technological devices that connect directly to a biological subject's brain – usually placed on the surface of the brain, or attached to the brain's cortex. A common purpose of modern brain implants and the focus of much current research is establishing a biomedical prosthesis circumventing areas in the brain that have become dysfunctional after a stroke or other head injuries. This includes sensory substitution, e.g., in vision.

User interface

In the industrial design field of human–computer interaction, a user interface (UI) is the space where interactions between humans and machines occur. The goal of this interaction is to allow effective operation and control of the machine from the human end, while the machine simultaneously feeds back information that aids the operators' decision-making process. Examples of this broad concept of user interfaces include the interactive aspects of computer operating systems, hand tools, heavy machinery operator controls and process controls.