Jason Russell was hospitalized last week in San Diego after a meltdown. He was seen naked, waving his arms in the air and pounding the pavement with his fists.
Russell's wife says her husband's condition was brought on by extreme exhaustion, stress and dehydration. She says it could be months before he returns to work.
Russell directed a video about brutal African warlord Joseph Kony that was seen by millions on YouTube.
On Wednesday, a bipartisan group of senators introduced a resolution condemning Kony for terrorizing Central Africa for 26 years.
The measure backs efforts to try and stop him and his guerilla group from child abductions and widespread killings.
The legislation also supports the U.S. effort to help regional forces pursue commanders of the militia group. President Barack Obama has sent about 100 U.S. troops to Central Africa as advisers to those regional forces.