Document ID: chunk:federal_register_of_legislation:F2023L00223:clause:1_356
Version: federal_register_of_legislation:F2023L00223
Segment Type: clause
Provision Reference: sch 1 cl 356
Character Range: 276951–277519

356     Loss of motion segment integrity is defined as an anteroposterior motion of one vertebra over another that is greater than 3.5mm in the cervical spine, greater than 2.5mm in the thoracic spine, and greater than 4.5mm in the lumbar spine. Alternatively, it is defined as a difference in the angular motion of two adjacent motion segments greater than 15° at L1-2, L2-3 and L3-4, greater than 20° at L4-5 and greater than 25° at L5-S1. In the cervical spine, it is also defined as motion at one level that is more than 11° greater than at either adjacent level.