The ASIA impairment scale describes a person’s functional impairment as a result of their spinal cord injury.
A- Complete
No motor or sensory function in the lowest sacral segment (S4-S5)
B- Incomplete
Sensory function below neurologic level and in S4-S5, no motor function below neurologic level
C- Incomplete
Motor function is preserved below neurologic level and more than half of the key muscle groups below neurologic level have a muscle grade less than 3.
D- Incomplete
Motor function is preserved below neurologic level and at least half of the key muscle groups below neurologic level have a muscle grade 3.
E- Normal
Sensory and motor function is normal
