 Now, other ways to assess the cerebellar function would be rapid alternating movements. So place your hands on your thighs, please, and now turn your palms up, and then alternate between palms up and palms down really quickly. Okay, very good. So that's rapid alternating movement. So the other test for rapid alternating movements, I'll have you touch your thumb and your index finger of both hands, and then touch with your thumb the middle finger, and then the ring, and then the pinky, and then go back and forth, and do that very fast about 10 times. Okay, thank you. You can stop. So for the lower extremities, I'll hold my palm behind or underneath your foot. Tap your foot down on my hand, please. Okay, go ahead. Okay, very good. And now let's see the other side. Okay, thank you. All done. And that is the rapid alternating movement of both upper and lower extremities.