"What's your favorite subject?" Dr. Charles Silberstein asked 8-year-old patient Zakary Newberry of Smithsburg.
"PE", Zakary replied, meaning physical education.
"What's your favorite activity in PE?" inquired Silberstein, a Johns Hopkins and Kennedy Krieger Institute orthopedist.
The soft-spoken Zakary responded that it was a game called "four corners," which he said involves students running to one of four corners before the teacher blows a whistle.
Several years ago, Zakary's parents weren't sure whether their son would be able to participate in such activities.
At 4 months old, they noticed Zakary hadn't been using the right side of his body. The condition progressed, and later, he was diagnosed with right spastic hemiplegia cerebral palsy, which affected his muscle movements.
"We weren't sure how he was going to walk or run," said Zakary's mother, Laura Newberry.
Her son now is "doing great," and credits Silberstein with playing a large part in helping Zakary walk and run, she said.