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Spinal cord injuries affect an estimated 15 to 20 million people worldwide, often causing lasting impairments in movement, sensation and independence. Such injuries can be especially devastating when they occur at the level of the neck, where damaged spinal circuits disrupt signa

3D bioprinting allows scientists to build custom tissue structures for medicine, but printing soft tissues like the human brain remains a major challenge. The strong pushing forces required to squeeze biological materials through tiny printer nozzles often crush and damage sensit