A child's neck is built and moves differently from an adult's, so the injuries, the imaging decisions, and the measurements all differ. Adult instability thresholds do not apply to young children, and some normal findings on a child's X-ray look like injuries. Any child with neck pain after a car accident belongs in an emergency department first, ideally one that treats children. These are the points I go over with parents in Charlotte afterward.
How a Child's Neck Is Different
A review from the Primary Children's Medical Center neurosurgery group describes the pediatric cervical spine as more elastic than an adult's, especially in the first eight years (McCall, Neurosurg Focus 2006). The facet joints are shallower and more horizontal, the ligaments and joint capsules stretch more without tearing, and young children have relatively large heads and weak neck muscles.
The large head moves the point of greatest motion higher in the neck. In infants and young children it is at C2-C3, by age 5 to 6 it is at C3-C4, and in adolescents it is at C5-C6, as in adults. Children younger than 9 mostly injure the upper neck, from the skull to C2, and older children injure the lower neck in an adult pattern. Pediatric neck injuries are more often ligamentous, and motor vehicle accidents are the most common cause.
Normal Findings That Look Like Injury
Pseudosubluxation is a forward shift of one vertebra on another that is normal in young children. In one study cited in the review, 40% of children younger than 8 had at least 3 mm of forward displacement at C2-C3 (McCall, Neurosurg Focus 2006). It can be seen up to about age 14. The review gives specific criteria, based on a line drawn through the back arches of C1 and C3, for separating pseudosubluxation from a true dislocation.
Growth plates in the vertebrae, called synchondroses, can also be mistaken for fractures on a child's X-ray. The C2 synchondroses usually close between ages 3 and 7.
Why Adult Thresholds Do Not Apply
The adult criteria for cervical instability, translation greater than 3.5 mm or angulation greater than 11 degrees, came from adult cadaver studies. The review notes that applying them to children is problematic, because a child's spine recoils more after injury and because 3.5 mm of shift can be normal in a young child. It cites a threshold of more than 4.5 mm at C2-C3 or C3-C4 for children younger than 8, and 3.5 mm at any level for children older than 8 (McCall, Neurosurg Focus 2006). Those numbers come from one cited source in a narrative review, and a pediatric specialist should interpret any child's measurements.
How Emergency Departments Decide Who Gets Imaged
The Pediatric Emergency Care Applied Research Network, PECARN, published a decision rule in 2024 from 22,430 children at 18 children's emergency departments (Leonard, Lancet Child Adolesc Health 2024). Cervical spine injury was confirmed in 1.9%. High-risk factors were severely altered mental status, abnormal airway, breathing, or circulation, and focal neurologic deficits including numbness, tingling, or weakness. Neck pain, midline neck tenderness, milder altered mental status, substantial head injury, and substantial torso injury carried lower but real risk. In the validation group, the combined rule had 94.3% sensitivity and a negative predictive value of 99.9%. Applied to every child, it could have reduced CT use from 17.2% to 6.9%.
The rule was built in specialized children's emergency departments. Its authors noted it still needs validation in community emergency departments.
What Parents Should Watch For
The review describes spinal cord injury without radiographic abnormality, SCIWORA, as more common in children younger than 8, with neurologic signs that are sometimes delayed. It also advises that neck pain not resolving within one to two weeks despite normal initial X-rays should raise concern that an injury was missed (McCall, Neurosurg Focus 2006). New weakness, numbness, tingling, or trouble walking in a child after a crash needs emergency evaluation, regardless of earlier imaging.
For an example of how post-collision imaging findings and outcomes are documented in the peer-reviewed literature, read Dr. Justin Dick's published case report on refractory lumbar pain following a motor vehicle accident in a geriatric patient.
Frequently Asked Questions
Are neck injuries in children different from adults?
Yes. Children's necks are more elastic, the point of greatest motion is higher, and children younger than 9 mostly injure the upper neck. Pediatric neck injuries are more often ligamentous (McCall, Neurosurg Focus 2006).
What is pseudosubluxation in a child's X-ray?
Pseudosubluxation is a normal forward shift of one vertebra on another in young children. In one cited study, 40% of children younger than 8 had at least 3 mm of displacement at C2-C3.
Do adult instability measurements apply to children?
No. Adult thresholds of 3.5 mm and 11 degrees came from adult cadavers. One cited pediatric threshold is more than 4.5 mm at C2-C3 or C3-C4 for children younger than 8 (McCall, Neurosurg Focus 2006).
Does my child need a CT scan after a car accident?
Not always. The 2024 PECARN rule identifies children who need neck imaging based on mental status, vital functions, neurologic deficits, neck pain, tenderness, and other injuries (Leonard, Lancet Child Adolesc Health 2024).
What symptoms should worry me after my child's car accident?
New weakness, numbness, tingling, or trouble walking needs emergency evaluation. Neck pain lasting more than one to two weeks despite normal X-rays should also be rechecked.
Where can I get my child evaluated after a car accident in Charlotte, NC?
A child with neck pain after a crash should be seen in an emergency department first. For follow-up, Dr. Justin Dick, DC, CNMT, ARRT(N)(CT), sees children at Clear Life Scoliosis and Chiropractic Center, 8814 Rachel Freeman Way, Suite 103, Charlotte, NC 28278, phone 980-368-0766.
Sources and Evidence Tiers
- McCall T, Fassett D, Brockmeyer D. Cervical spine trauma in children: a review. Neurosurg Focus. 2006;20(2):E5. PMID 16512656. LinkEvidence tier: Narrative review
- Leonard JC, Harding M, Cook LJ, et al. PECARN prediction rule for cervical spine imaging of children presenting to the emergency department with blunt trauma: a multicentre prospective observational study. Lancet Child Adolesc Health. 2024;8(7):482-490. PMID 38843852. LinkEvidence tier: Prospective multicenter derivation and validation cohort (22,430 children)
- Beckmann NM, West OC, Nunez D, et al. ACR Appropriateness Criteria: Suspected Spine Trauma. J Am Coll Radiol. 2019;16(5S):S264-S285. PMID 31054754. LinkEvidence tier: Evidence-based guideline with expert panel rating (RAND/UCLA and GRADE)
About the author. Dr. Justin M. Dick, DC, is the owner and treating clinician at Clear Life Scoliosis and Chiropractic Center in Charlotte, NC. He holds dual imaging credentials as a Certified Nuclear Medicine Technologist (CNMT) and as an ARRT-registered technologist in nuclear medicine and CT, ARRT(N)(CT). He is a Senior Fellow of the CLEAR Institute, holds the ISICO World Masters credential, is a SOSORT provisional member, and is a certified DOT medical examiner on the FMCSA National Registry. He has multiple peer-reviewed publications indexed in PubMed and serves as adjunct faculty at Life, Sherman, and Palmer chiropractic colleges.
Service Area
Clear Life Scoliosis and Chiropractic Center sees personal injury and spinal imaging patients from Charlotte NC, Huntersville NC, Ballantyne NC, Matthews NC, Concord NC, Mooresville NC, Rock Hill SC, and Fort Mill SC.
Related Pages
- Personal injury and car accident spinal care in Charlotte
- Dr. Justin Dick's research
- Case report: refractory lumbar pain after a motor vehicle accident
- Research and evidence at Clear Life
- Questions and answers
- Our team
- Press
- Book your evaluation
- Contact Clear Life
Clear Life Scoliosis and Chiropractic Center
8814 Rachel Freeman Way, Suite 103
Charlotte, NC 28278
Phone: 980-368-0766
Email: office@clearlifescoliosis.com
Book online
Justin Dick
Contact Me
