Reactivity and Resistance of Spinocerebral Structures during Instrumented Correction of Spinal Deformities

The aim of the present work was to perform an electroneuromyographic assessment of the reactivity and resistance of pyramidal structures of the spinal cord in response to intraoperative exposure to factors associated with the use of instrumented correction of spinal deformities of different etiologies and severities using submersible transpedicular fixation systems. Before treatment and at 4–31 (mean 9.6 ± 0.3) days after surgery, global and stimulated (M responses) electroneuromyography investigations were performed in 135 patients aged 8–50 (mean 16.4 ± 0.6) years (42 male and 93 female) with spinal deformities of different etiologies and severities. maximum intraoperative correction angles for deformities of the spinal column ranged from 3 to 95° (mean 37.2 ± 1.5°). The reactivity of spinal cord structures located at the apex of the base of main deformation arc was assessed in terms of an integral indicator – the index of sensorimotor deficit – (ISD). The lowest ISD values and the clearest post-operative negative trends in this indicator were seen in people with spinal deformities of neuromuscular etiology.