Lamar Odom has shown enough steady improvement in recent days at Sunrise Hospital and Medical Center that he has started physical therapy, according to multiple sources familiar with the situation.

Odom hasn't experienced any setbacks after breathing without the help of a ventilator.

Odom is also showing marked improvement with his breathing, vision and the ability to have simple conversations. Odom will begin physical therapy that will show whether he can walk.

Odom could also have serious brain damage considering a 911 call released last Wednesday reported Odom took cocaine and 10 doses of a sexual performance enhancer over three days.