Actor and comedian Seth Rogen gave a funny but moving testimony at a U.S. Senate hearing on Alzheimer's disease Thursday, sharing the story of how the disease has impacted his mother-in-law. He described "the real ugly truth of the disease," telling how by the age of 60, his mother-in-law had forgotten "how to speak, feed herself, dress herself and go to the bathroom herself."

But it seems not everyone cared to listen.

After his testimony Thursday, Rogen took to Twitter to question why lawmakers left in the middle of his testimony, or didn't show up at all:

Not sure why only two senators were at the hearing. Very symbolic of how the Government views Alzheimer's. Seems to be a low priority. — Seth Rogen (@Sethrogen) February 26, 2014

.@SenatorKirk pleasure meeting you. Why did you leave before my speech? Just curious. — Seth Rogen (@Sethrogen) February 26, 2014

All those empty seats are senators who are not prioritizing Alzheimer's. Unless more noise is made, it won't change. pic.twitter.com/xDW6tlMHmH — Seth Rogen (@Sethrogen) February 26, 2014