Hypotonia is a medical word for low muscle tone. If your baby has it, they will likely feel limp in your arms, like a rag doll. That’s why it’s also called floppy infant syndrome.

Hypotonia is the medical term for low muscle tone that doctors usually diagnose in infants. The condition is less common in adults. People sometimes call it floppy muscle syndrome.

Hypotonia literally means loss of muscle tone. The condition was first described in 1956 among infants who were termed “floppy infants”.

Hypotonia, or poor muscle tone, is usually detected at birth or during infancy. Learn more about signs, causes, and treatments.

Floppy baby syndrome is a condition associated with impaired development of motor skills and signs of hypotonia, profound weakness, and rag-doll features. 1,2 Because numerous disorders can give ...

Hypotonia may be congenital (present since birth) or acquired later in life, but it is most common among babies and detectable shortly after birth. The loss of muscle tone seen in hypotonia can ...

Symptoms of Hypotonia. When the condition occurs in infants, they have a floppy quality appearance as their arms and legs hang by their sides and they have very little or no control over their head.

Study shows how motor delays and hypotonia can help clinicians diagnose genetic disorders in children early, while addressing ...