Spinal muscular atrophy (SMA) is an inherited disorder that causes muscle wasting (atrophy), muscle weakness, and loss of movement. Symptoms may include weakness in the limbs; movement problems, such as difficulty walking; tremors; swallowing problems; and breathing difficulties.
The most severe type of SMA affects babies less than 6 months old and is usually fatal within the first few years. The least severe type begins in early adulthood, tends to cause relatively mild symptoms, and does not affect life expectancy. There is no cure for SMA.
Treatment is aimed at managing the symptoms.

Othere related diseases

LATERAL EPICONDYLITIS
Lateral epicondylitis (tennis elbow) and medial epicondylitis (golfer’s elbow) both occur when the tendon attachment of the muscle to the bone at the elbow be...

LIGAMENT SPRAINS
Ligaments are bands of tissue that hold bones together at a joint. They are not very stretchy and are prone to tearing, especially when subjected to sudden forc...

METATARSALGIA
Pain in the ball of the foot—metatarsalgia— is commonly due to excessive pressure on the ball of the foot from high-impact sports, poorly fitting footwear, ...

MUSCLE CRAMPS
Sudden muscle spasms in which a muscle or group of muscles becomes hard, painful, and tight often occur during physical exercise. Another common cause is sittin...

MUSCLE STRAINS AND TEARS
Muscle injuries range from a mild strain (sometimes referred to as pulling a muscle), in which the muscle fibers are overstretched, to a complete tear.
Str...

MYASTHENIA GRAVIS
In myasthenia gravis, the immune system attacks the receptors in muscles that receive nerve signals, resulting in muscle weakness.
The condition is sometim...

NERVOUS DISORDERS