Spinal Cord Injury Levels Explained — C1-C7, T1-T12, L1-L5

Spinal cord injury cases turn on a number. C5. T6. L1. That number is the level of the injury — the place on the spinal cord where the damage occurred — and it predicts almost everything about the long-term picture: what the person can move, what they can feel, whether they can breathe on their own, and what care they will need for the rest of their life. Understanding the level system is the most useful single thing a family can do when reading the medical records.

The Spine in Four Sections

The spinal cord runs from the base of the skull to the lower back, divided into four regions:

• Cervical (C1-C8) — the neck. Eight cervical levels.
• Thoracic (T1-T12) — the upper and middle back. Twelve thoracic levels.
• Lumbar (L1-L5) — the lower back. Five lumbar levels.
• Sacral (S1-S5) — the tailbone region. Five sacral levels.

Injuries are described by the lowest level at which the cord still functions normally. A "C5 injury" means everything from C5 up works; everything below is affected.

Cervical Injuries (C1-C8) — Tetraplegia / Quadriplegia

Cervical injuries affect all four limbs and the trunk. The higher the cervical level, the more extensive the impairment.

• C1-C4. Affects respiratory function. C1-C3 injuries usually require permanent ventilator support. Patients have no independent arm movement.
• C5. Some shoulder and bicep function. Cannot extend wrist or move hands. Requires complete assistance with most activities of daily living.
• C6. Wrist extension preserved. Some ability to manipulate objects with tenodesis grip. Greater independence than C5 but still substantial care needs.
• C7. Triceps function preserved — can push from the chair. Greater independence with transfers and self-care.
• C8. Finger function partially preserved. Substantial independence possible with adaptive equipment.

Thoracic Injuries (T1-T12) — Paraplegia, Trunk-Affected

Thoracic injuries preserve arm and hand function but affect the trunk and legs.

• T1-T5. Affects respiratory function (less than cervical). Trunk control limited. Wheelchair-dependent but with full arm and hand function.
• T6-T12. Progressively better trunk control. Independent transfers, full self-care, work capacity often preserved with accommodations.

Lumbar and Sacral Injuries (L1-S5) — Paraplegia, Lower-Body

Lumbar and sacral injuries affect the legs and bowel/bladder function but preserve trunk control.

• L1-L3. Hip flexion preserved. May ambulate with bracing and assistive devices.
• L4-L5. Knee and some ankle function preserved. Ambulation with bracing increasingly possible.
• S1-S5. Lower extremity function increasingly preserved. Bowel, bladder, and sexual function still affected at higher sacral levels.

Complete vs. Incomplete Injuries

The level is only half the picture. The other half is whether the injury is complete (no motor or sensory function below the injury level) or incomplete (some function preserved).

The American Spinal Injury Association (ASIA) Impairment Scale classifies injuries from A through E:

• ASIA A. Complete — no motor or sensory function below the level.
• ASIA B. Sensory incomplete — sensation preserved but no motor function.
• ASIA C. Motor incomplete — some motor function, more than half of key muscles below the level grade less than 3 of 5.
• ASIA D. Motor incomplete — some motor function, at least half of key muscles grade 3 or higher.
• ASIA E. Normal motor and sensory function (recovery from earlier injury).

How the Level Drives the Case

For catastrophic injury cases, the spinal level shapes the entire damages picture. Components that change with level:

• Lifetime medical care. Higher cervical injuries require 24-hour personal care, respiratory care, ongoing equipment, home modifications. Lower thoracic and lumbar injuries may require less direct care but still substantial accommodations.
• Vocational impact. Some lower-level injuries permit return to certain types of work; higher cervical injuries usually do not.
• Equipment needs. Power wheelchair vs. manual, ventilator vs. independent breathing, home accessibility modifications.
• Therapy and rehabilitation. Lifetime physical, occupational, and respiratory therapy needs.
• Future complications. Pressure injuries, autonomic dysreflexia, respiratory infections, urinary tract infections — all more common and more severe at higher levels.
• Life expectancy. National statistics show measurable reductions in life expectancy depending on level and ASIA grade.

What the Records Show

Spinal cord injury cases turn on a specific set of records:

• The emergency department record and the trauma activation note.
• The initial spine imaging (CT, MRI) and the radiologist's report on the level and extent of injury.
• The neurosurgical or spine surgical operative note.
• The ASIA exam, typically performed by a physical medicine and rehabilitation (PM&R) specialist.
• The inpatient rehabilitation summary.
• The life care plan developed by a certified life care planner.
• Subsequent neurology and PM&R follow-up assessing recovery trajectory.

Our companion page on spinal cord injury and paralysis covers the medical picture in more clinical detail.

If Your Family Is Facing a Spinal Cord Injury Case

A free case review focused on a catastrophic spinal cord injury typically focuses first on the cause of the injury (vehicle crash, fall, medical event), the level and ASIA grade, and the deadlines that apply in the state where the injury occurred. Our team includes Herb Borroto, M.D., J.D., who reads the imaging and neurological exam records in-house.

• Read about spinal cord injury cases: Spinal cord injury and paralysis.
• Read about the first 24 hours of evidence preservation: The First 24 Hours.

Free case review. No Fees Unless We Recover Money for You.

Sources

• American Spinal Injury Association (ASIA) — "International Standards for Neurological Classification of Spinal Cord Injury." asia-spinalinjury.org
• National Spinal Cord Injury Statistical Center — Annual statistical report on spinal cord injury epidemiology and outcomes. nscisc.uab.edu
• Christopher & Dana Reeve Foundation — Living with paralysis resource library. christopherreeve.org
• National Institute of Neurological Disorders and Stroke — Spinal Cord Injury Information Page. ninds.nih.gov
• National Library of Medicine / PMC — peer-reviewed reviews of SCI outcomes by level. ncbi.nlm.nih.gov