What is complete versus incomplete spinal cord injury?

Complete spinal cord injuries involve total loss of motor and sensory function below injury level, while incomplete injuries preserve some function creating vastly different prognoses and damages. Complete injuries eliminate all voluntary movement, sensation, and reflexes below lesion level regardless of stimulation intensity. Incomplete injuries maintain some sensory or motor function below injury level with varying preservation patterns. ASIA Impairment Scale classifies completeness from A (complete) through E (normal function) standardizing assessments. Complete injuries typically show no improvement below level after spinal shock resolves in 24-72 hours. Incomplete injuries offer hope for recovery though extent remains unpredictable initially. Sacral sparing indicating incomplete injury preserves anal sensation suggesting better prognosis. Zone of partial preservation in complete injuries shows sporadic function without useful recovery. Functional differences prove dramatic with incomplete injuries potentially allowing some walking versus complete paralysis. Life care costs vary substantially based on independence levels and complication risks. Vocational options expand with incomplete injuries preserving some function. Psychological impacts differ with complete injuries requiring full adaptation versus incomplete offering recovery hope. Legal valuations must account for certainty of complete injuries versus unpredictability of incomplete outcomes. Understanding distinctions helps set appropriate compensation for vastly different disability levels.