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Table 1 American Spinal Injury Association classification 11

From: Posterior short-segment fixation with implanting pedicle screw in the fractured level as a feasible method for treatment of thoracolumbar fracture

Grade Neurologic deficit
A No sensory or motor function is preserved in sacral segments S4-S5
B Sensory, but not motor function is preserved below the neurologic level and extends through sacral segments S4-S5
C Motor function is preserved below the neurologic level and most key muscles below the neurologic level have muscle grade less than 3.
D Motor function is preserved below the neurologic level and most key muscles below the neurologic level have muscle grade greater than or equal to 3.
E Sensory and motor functions are normal