10-m run test 10-m walk rest ACDF Adolescents Clinical & internal medicine Cruzadas Exercici per a joves Historia MRI Medicine Ossos SCI Salut i higiene age automated segmentation blood-spinal cord barrier cervical and thoracic spinal cord injury cervical decompression cervical dizziness cervical plating cervical spinal cord compression cervical spine cervical spine degeneration cervical spondylosis cervical spondylotic myelopathy cervical spondylotic myelopathy (CSM) cervical torsion test cervical vertigo complications convolutional neural network