Frequency of Hot Spots Position 6 Left Back 5 Center Back 2 Right Back 3 Left Center 0 Center Back 3 Right Center 2 Left Front 2 Center Front 6 Right Front Trial at 0 cm Left Back Center Back Right Back Left Center Center Right Center Left Front Center Front Right Front 1 X X X X 2 X X X X Trial at 5 cm Left Back Center Back Right Back Left Center Center Right Center Left Front Center Front Right Front 1 X X X 2 X X X X Trial at 10 cm Left Back Center Back Right Back Left Center Center Right Center Left Front Center Front Right Front 1 X X 2 X Trial at 15 cm Left Back Center Back Right Back Left Center Center Right Center Left Front Center Front Right Front 1 X X 2 X X X Trial at 20 cm Left Back Center Back Right Back Left Center Center Right Center Left Front Center Front Right Front 1 X X 2 X X X X