Question: What is abnormalities?

Maedeh Borhani answered on 8 Mar 2016:

an abnormality in musculoskeletal system (muscles+bones in the body) can be either due to a disorder present at birth or can be due to injury/accident in later stage. Or in another word, any minor or major physical disabilities are called abnormality. abnormality of the muscle or bones can affect major areas of the body, including the: neck, shoulders, wrists, legs, knees and so on. we can have abnormal muscles or bone functions because of a particular disorder (disease), including:
low back pain, osteoarthritis, rheumatoid arthritis and so on.