Speaking before the Lakers played the Phoenix Suns Monday night, Jackson said Artest still was experiencing some dizziness.
Artest sustained a concussion and injured his left elbow in a fall at his home on Christmas Day. The team said Artest tripped over a box and fell down stairs.
He did not travel with the Lakers on their two-game trip to Sacramento and Phoenix.
The 6-foot-7 forward is averaging 12.1 points and 4.8 rebounds in his first season with the Lakers after signing as a free agent.
Jackson said his information on Artest's condition came through the team trainer.