Complex Electrical Stimulation Systems in Motor Function Rehabilitation after Spinal Cord Injury

Figure 4

Characteristics of the computational model [51]. (a) Anatomically real spinal cord model, with different colors for gray matter and white matter, cerebrospinal fluid, and epidural fat. (b) The finite element structure of the spinal cord and the meshing of tetrahedral elements, as well as the cross-sectional schematic diagrams of the spine segments L2 (A) and S1 (B). (c) Modeling of afferent and efferent nerves, and establishing real geometric models of afferent and efferent fibers, α motor neurons and interneurons. The membrane potential was calculated by the Hodgkin-Huxley equation. The afferent fiber enters the spinal cord below the spine segment S1 and travels longitudinally before bending in the gray matter of its target segment. Interneurons are located in layers I to III and VII, and the efferent axons expand to the dorsal side or pass through the midline of the spinal cord, respectively.

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