All views in neutral upright (weight bearing) position
See Retrolisthesis of L5 x-ray for how measurements are made.
1 Cervical Retrolisthesis of C2, C3, C4 and Anterolisthesis of C5
Retrolisthesis (a move backward on the vertebra below)
C2 on C3, C3 on C4, C4 on C5
Also and Anterolisthesis (a forward movement) of C5 on C6
2 Lateral Cervical spine
This neck looks near to normal at first glance.
See the close up 3 below
3 C2 Retrolisthesis (2.5 mm spot view of 2 above)
Another 0.5mm displacement on top of what is present
in this neutral upright view would be interpreted as a
25% to 28% whole person impairment 1. It may
be present if flexion-extension views were taken to confirm my
T9 has a posterior translation of 1 mm not classed as a retrolisthesis.
T10 is a 3mm retrolisthesis and T11 a 5 mm translation retrolisthesis
T 10 and T11 both slipping greater than 2.5mm would each because of their
presence give a 20% to 23% whole person impairment rating..
L5 has an 8 mm displacement posterior to Sacrum. This represents
joint instability in excess of 4.5mm required for a 20% to 23%
whole person impairment 1.
1 Cocchiarella L., Andersson, G. “American Medical Association Guides to the
Evaluation of Permanent Impairment”, 5th edition, Tables 15- 3, 15-4, 15-5.