Spinal muscular atrophy symptoms

Infantile SMA is the most severe form. Some of the symptoms include:

• muscle weakness
• poor muscle tone
• weak cry
• limpness or a tendency to flop
• difficulty sucking or swallowing
• accumulation of secretions in the lungs or throat
• legs that tend to be weaker than the arms
• hypotonia, areflexia, and multiple congenital contractures (arthrogryposis) associated with loss of anterior horn cells
• feeding difficulties
• increased susceptibility to respiratory tract infections
• developmental milestones, such as lifting the head or sitting up, can't be reached.