CERVICAL STENOSIS:
Anatomography, Cervical vertebrae lateral2, CC BY-SA 1.0>

DEGENERATIVE DISC DISEASE
Stillwaterising, Cervical Spine MRI showing degenerative changes, black arrows at C5/C6 level to identify degenerative disc by Michael Krzyskowski, CC BY-SA 3.0

DISC HERNIATION
Edave, L4-l5-disc-herniation, Black arrow at L4/L5 herniated disc by Michael Krzyskowski, CC BY-SA 3.0
Anthonp, C6-C7-disc-herniation-cevical-mri-scan, Black arrow at C6/C7 herniated disc by Michael Krzyskowski, CC BY-SA 3.0

LUMBAR SPONDYLOLISTHESIS
Lucien Monfils, SpondylolisthesisL5S1, CC BY-SA 3.0

LUMBAR STENOSIS:
Anatomography, Lumbar vertebrae anterior, CC BY-SA 1.0
Anatomist90, Lumbar vertebrae, CC BY-SA 3.0