Forty-eight hours have passed since Purdue big man Jay Simpson collapsed at Nebraska and there's still no definitive word on what caused the issue, Matt Painter said Tuesday.

But the redshirt freshman's status for Wednesday's meeting with Michigan isn't exactly what matters right now, Painter said.

"Any time something like that happens, it's really scary, when you fall down with no real contact," Painter said. "And Jay isn't a guy who plays long minutes. He plays for short periods of time. He just kind of buckled and got dizzy.

"You want to be extra careful and do anything in your power to figure out what's going on."

Simpson had played 10 minutes in Lincoln. He'd been in the game for 42 seconds of game time when he fell on the floor with 12:09 to play and remained down, requiring attention. He walked off the floor shortly thereafter under his own power and returned to the bench.

The young big man is asthmatic and has long battled conditioning issues, limiting the amount of time he can typically remain on the floor. Simpson, Purdue's backup center, averages 12 minutes per game.

Painter said Simpson has undergone tests and will go through more Tuesday afternoon and Purdue hopes to have some answers "in the next day or two."

Simpson did not practice Monday beyond some light free throw shooting.

Purdue plays Big Ten-leading Michigan at 7 p.m. Wednesday. Should Simpson be sidelined, it would likely mean more minutes for senior Travis Carroll