Design and fabrication of macro-architectures for spinal cord implants. (A) Axial view of designs for cylinder (i), tube (ii), channel (iii), open-path with core (iv), and open-path without core (v). (B) Wireframe view of a mold for the channel design, a funnel is built into the top through which salt and polymer are poured to fill the mold. (C) The open-path without core mold design with polymer and salt inlet (i), oblique view (ii) and side view (iii). (D) The open-path with core design (i), oblique view (ii) and side view (iii). SEM micrographs for cylinder (E), tube (F), channel (G), open-path with core (H), and open-path without core (I) scaffolds after fabrication.