Abnormal morphology of the abdominal musculature +
Abnormal morphology of the chest musculature
Abnormal morphology of the musculature of the neck +
Abnormal morphology of the pelvis musculature +
Abnormal morphology of the shoulder musculature
Abnormal muscle fiber morphology +
Any abnormality of the skeletal muscle cell. Muscle fibers are subdivided into two types. Type I fibers are fatigue-resistant and rich in oxidative enzymes (they stain light with the myosin ATPase reaction), and type II fibers are fast-contracting, fatigue-prone, and rich in glycolytic enzymes (these fibers stain darkly). Normal muscle tissue has a random distribution of type I and type II fibers.