Frankel Classification grading system for Acute Spinal Injury

Grade A (Complete neurological injury)
- no motor or sensory function clinically detected below the level of the injury.

Grade B (Preserved sensation only)
- no motor function clinically detected below the level of the injury; sensory function remains below the level of the injury but may include only partial function (sacral sparing qualifies as preserved sensation).

Grade C (Preserved motor non-functional)
- some motor function observed below the level of the injury, but is of no practical use to the patient.

Grade D (Preserved motor function)
- useful motor function below the level of the injury; patient can move lower limbs and walk with or without aid, but does not have a normal gait or strength in all motor groups.

Grade E (Normal motor)
- No clinically detected abnormality in motor or sensory function with normal sphincter function
- abnormal reflexes and subjective sensory abnormalities may be present.