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Table 1 The American Spinal Injury Association (ASIA) impairment scale (modified Frankel classification) ASIA grade description [10]

From: Magnetic resonance diffusion tensor imaging of acute spinal cord injury in spinal trauma

A Complete no sensory or motor function persists in the sacral segments S4–S5
B Incomplete sensory and not motor function remains below the neurological level, including the sacral segments S4–S5
C Incomplete motor function is pertained below the neurological level. More than half of the key muscles below the neurological level possess a muscle grade less than 3
D Incomplete motor function is restored below the neurological level, and at least half of the key muscles below the neurological level have muscle grade greater than or equal to 3
E Normal sensory and motor functions remain normal