X-ray showing bell-shaped torso due to atrophy of intercostal muscles and using abdominal muscles to breathe. Bell-shaped torso is not specific to individuals with<unk> . The symptoms vary depending on the<unk>  type, the stage of the disease as well as individual factors. Signs and symptoms below are most common in the severe<unk>  type 0/I: * Areflexia, particularly in extremities * Overall muscle weakness, poor muscle tone, limpness or a tendency to flop * Difficulty achieving developmental milestones, difficulty sitting/standing/walking * In<unk> ll children: adopting of a frog-leg position when sitting (hips abducted and knees flexed) * Loss of strength of the respiratory muscles: weak cough, weak cry (infants), accumulation of secretions in the lungs or throat, respiratory distress * Bell-shaped torso (caused by using only abdominal muscles for respiration) in severe<unk>  type * Fasciculations (twitching) of the tongue * Difficulty sucking or swallowing, poor feeding
Spinal muscular atrophy
Prader–Willi syndrome
Spinal and bulbar muscular atrophy
Duchenne muscular dystrophy
Madras motor neuron disease
Congenital muscular dystrophy
Muscular dystrophy
Distal spinal muscular atrophy type 1