The actor who plays Brick on the MIDDLE seems to walk w/ a limp. Why is that?

Atticus Shaffer, who plays the role of a peculiar second grader named Brick Heck in the ABC sitcom, The Middle, has a limp because of a genetic disorder known as brittle bone disease .

While his case is less severe than most, physical activity is a challenge at times. The disease is often referred to as osteogenesis imperfecta (OI), which means “imperfectly formed bone.”

Brittle bone disease is caused by a defect, or flaw, in the gene that produces type 1 collagen, a protein used to create bone. The defective gene is usually inherited. In some cases, however, a genetic mutation, or change, can cause it. Learn more about the disorder at Healthline.com.

Atticus Shaffer was born on June 19, 1998 in Santa Clarita, California. He's also known for Matty Newton in the The Unborn, his voiceover in the movie Frankenweenie.

He's also appeared in one of several small roles on shows like Days of Our Lives, My Name is Earl, and on a scene with Will Smith in the movie Hancock.

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