Earth
Random Heel-Drop Impulse Response
Lie supine, knees bent. Track the impulse response — how the abdomen, ribs, and left leg react to each drop — and ask whether responses are identical or whether the same impulse evokes different shapes depending on what the body was doing just before.
Full Lesson Notes
Complete Practice
Lie supine, knees bent. Lift the right foot one inch off the floor and let it drop; repeat at random intervals between half a second and three seconds. Each drop is an impulse delivered to a system whose state has changed since the last. Track the impulse response — how the abdomen, ribs, and left leg react to each drop — and ask whether responses are identical or whether the same impulse evokes different shapes depending on what the body was doing just before. This maps the hysteresis loop of the trunk.
