PHOENIX, Ariz. (AP) _ Veteran driver Jim Robinson remained in extremely critical condition Tuesday after suffering severe head injuries in last weekend's 10th annual Copper World Classic stock car race at Phoenix International Raceway.

Robinson, 42, of North Hollywood, Calif., was leading the 40-lap race Sunday when his car tangled momentarily with a vehicle driven by defending champion Gary Collins. Robinson's car smashed head-on into the wall on turn two of the ninth lap.

The race was delayed more than an hour while paramedics treated Robinson at the track. He was airlifted to Barrow Neurological Institute at St. Joseph's Hospital and Medical Center.

A hospital spokeswoman said Tuesday that Robinson was admitted late Sunday afternoon in extremely critical condition ''and there has been no change.'' She said no other details were being released.