The ornamental design for an examinationtablecushion, as shown and described.
FIG. 1 is a top perspective view of an examination table cushion showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a back elevational view thereof;
FIG. 4 is a left elevational view thereof;
FIG. 5 is a right elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines shown in the drawings depicting protrusions, recesses and other features illustrate environment that forms no part of the claimed design.