30. A.S.I.A. classification
A: Complete sensomotor deficit
B: Complete motor paralysis
Sensory normal
C: Useless motor capacity
D: Useful motor capacity
E: Normal
40. White A- Panjabi M
Clinical Biomechanics of the Spine
1978.
Check list for the diagnosis of clinical
instability in lumbar spine
Element Point value
Anterior elements destroyed or unable to function
2
Posterior elements destroyed or unable to function
2
Radiographical criteria
A. Flexion / extension x- rays
1. Sagital plane transplantation > 4.5 mm or 15% (2pts)
2. Sagital plane rotation
> 15o at L1 – L2 , L2 – L3, L3 – L4 (2pts)
> 20o at L4 – L5 (2pts)
> 25o at L5 – S1 (2pts)
OR
4
B. Resting x-rays
1. Sagital plane displacement > 4.5 mm or 15% (2 pts)
2. Relative sagital plane amgulation > 22o (2 pts)
Cauda equina damage
3
Dangerous loading aticipated
1
Total of 5 or more = unstable
