Fig. 1: Design, technology and implantation of the BSI.
From: Walking naturally after spinal cord injury using a brain–spine interface
a, Two cortical implants composed of 64 electrodes are positioned epidurally over the sensorimotor cortex to collect ECoG signals. A processing unit predicts motor intentions and translates these predictions into the modulation of epidural electrical stimulation programs targeting the dorsal root entry zones of the lumbosacral spinal cord. Stimulations are delivered by an implantable pulse generator connected to a 16-electrode paddle lead. b, Images reporting the pre-operative planning of cortical implant locations, and postoperative confirmation. L, left; R, right. c, Personalized computational model predicting the optimal localization of the paddle lead to target the dorsal root entry zones associated with lower limb muscles, and postoperative confirmation.
