Bret Michaels Suffers Setback

Still in intensive care after his life-threatening brain hemorrhage, Bret Michaels has suffered a significant side-effect setback. He has developed hyponatremia, a lack of sodium in the body that can lead to seizures. But despite the dangerous turn of events, doctors remain guardedly optimistic about the former Poison frontman's chances of a full recovery—though they still have not figured out the source of bleeding in his brain.

"We do know that Mr. Michaels' condition is still being described as critical," a neurosurgeon tells ABC News. "However, the fact that he is conscious does suggest a better prognosis than if he were comatose." (Read more Bret Michaels stories.)