Fig. 5.
The weight of the body (P1 or P2) can be broken down into component of compression perpendicular to the intervertebral disc and a component of shearing (C1 or C2). The shearing force is small at the L4–L5 level and much greater at L5–S1
The weight of the body (P1 or P2) can be broken down into component of compression perpendicular to the intervertebral disc and a component of shearing (C1 or C2). The shearing force is small at the L4–L5 level and much greater at L5–S1