Investigation of Peak Pressure Index Parameters for People with Spinal Cord Injury Using Wheelchair Tilt-in-Space and Recline: Methodology and Preliminary Report
Figure 1
A sample sensel window. The peak pressure refers to the maximal sensel value in the window. The peak pressure index refers to the average sensel value in the window. The center of pressure coordinate refers to the summation of the product of each sensel’s pressure value with its grid coordinate, divided by the total pressure sum; that is, , where is the number of sensels, is the pressure of the th sensel, and and are the and coordinates of the th sensel. For this sample, the peak pressure (circled) is 38.40 mm Hg, the peak pressure index is 14.44 mm Hg, and the center of pressure coordinate (starred) is at , .
