Trend lines typically are straight lines, although some variations use higher degree polynomials depending on the degree of curvature desired in the line.
Nevertheless, calculations show that spontaneous lipid curvature alone is either insufficient or would require conditions that are unrealistic to drive the degree of curvature observed in most cells.
The magnetic field surrounding the entire inner detector causes charged particles to curve; the direction of the curve reveals a particle's charge and the degree of curvature reveals its momentum.
When straight routes are not possible, reducing the number of curves and lowering the degree of curvature would result in higher allowable speeds on those curves.
These types of high-end curves typically do not respond well to conservative treatment and almost always warrant spinal fusion surgery, which can successfully restore the body's natural degree of curvature.