Complete vs Incomplete Spinal Cord Injury Explained

Early in a spinal cord injury, two words decide most of what follows: complete or incomplete. They come from a neurologic exam, they get written into the chart in a shorthand most people are never taught to read, and they shape both the medical outlook and the case.

The distinction

A complete injury means no motor or sensory function is preserved below the level of injury, including the lowest sacral segments. An incomplete injury means some function remains below that level, even if it is limited. That preserved function is why incomplete injuries carry a broader range of outcomes.

It is worth being clear about what these words do not mean. "Complete" does not mean the cord was severed, and it does not mean nothing will ever change. It is a description of function at the time of examination, and examinations are repeated for exactly that reason.

How it is measured

Clinicians use the ASIA Impairment Scale, from the American Spinal Injury Association, graded A through E. Grade A is complete. Grades B through D describe increasing preserved function, with the distinction between C and D turning on muscle strength below the level. Grade E indicates normal function on testing.

The grade is assigned alongside a level, the lowest segment with normal function. Together, level and grade are the shorthand that predicts most of the medical arc.

Why the level matters as much as the grade

• Cervical (C1 to C8). Affects arms and hands, and the highest injuries affect breathing. Hand function is often the dividing line for independent living.
• Thoracic (T1 to T12). Upper limbs generally spared. Trunk stability and independent transfers vary with the level.
• Lumbar and sacral. Increasing preserved leg function, with bowel, bladder, and sexual function commonly affected.

Two people can both be graded ASIA A and live very different lives, because the level differs. This is why a classification alone is not a valuation.

The part that matters for a claim

Early classification is done under difficult conditions, sometimes while a person is sedated, intubated, or in spinal shock, and it is frequently revised over the following weeks. That revision is medically ordinary. In a claim it becomes important, because an early note and a later assessment that disagree will be noticed, and the gap generally gets read against the injured person unless somebody puts the sequence in order and explains it.

Reading the rehabilitation records closely matters more here than reading the acute chart. The acute record captures a crisis. The rehabilitation record captures function, and function is what the case is actually about.

Recovery, honestly

Incomplete injuries can improve, sometimes considerably, and most meaningful neurologic change happens in the first year, though it does not stop precisely at twelve months. Complete injuries improve less often. The practical consequence is the same in both cases: the picture used to value the case should be the plateau, not the first month.

What to do with this

Ask for the ASIA grade and level in writing, and ask again after each reassessment. Keep the rehabilitation notes, not just the hospital discharge summary. If the classification in the chart does not match the function you actually have, that is worth having somebody look at, because it flows straight through to the life care plan and from there to the value of the case.

We represent injured people in Denver and across Colorado and are available to evaluate spinal cord injury claims. No attorney fee unless we recover for you, and we do not charge case costs if we do not win. If you want someone to read the records with you, call (720) 432-7032 or reach our Denver spinal cord injury lawyers. Related: how lifetime care costs are calculated.