Facioscapulohumeral muscular dystrophy is a muscle weakness and loss of muscle tissue that gets worse over time. Facioscapulohumeral muscular dystrophy affects the upper body. It is not the same as Duchenne muscular dystrophy and Becker muscular dystrophy , which affect the lower body. Facioscapulohumeral muscular dystrophy is a genetic disorder due to a chromosome mutation.
Facioscapulohumeral muscular dystrophy - Genetics Home Reference - NIH
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Facioscapulohumeral muscular dystrophy is a muscle weakness and loss of muscle tissue that gets worse over time. Superficial muscles are close to the surface of the skin. Muscles which lie closer to bone or internal organs are called deep muscles. Facioscapulohumeral muscular dystrophy affects the upper body.
FSHD may initially involve weakness of muscles of the face, shoulder girdle and arms. Facial weakness may result in limited movements of the lips, causing difficulties whistling, using a straw, or puckering the lips. Upper facial weakness may also lead to an inability to completely close the eyes during sleep.