What Is A Hyperactive Moro Reflex?

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What does an exaggerated Moro reflex mean?

An exaggerated Moro reflex can be seen in infants with severe brain damage that occurred in-utero, including microcephaly and hydrancephaly. Exaggeration of the Moro reflex, either due to low threshold or excessive clutching, often occurs in newborns with moderate hypoxic-ischemic encephalopathy.

What is normal Moro reflex?

The normal response is for the baby to have a startled look. The baby's arms should move sideways with the palms up and the thumbs flexed. The baby may cry for a minute. As the reflex ends, the infant draws its arms back to the body, elbows flexed, and then relaxes.

What is hyperactive reflexes in babies?

Hyperekplexia is a rare hereditary, neurological disorder that may affect infants as newborns (neonatal) or prior to birth (in utero). It may also affect children and adults. Individuals with this disorder have an excessive startle reaction (eye blinking or body spasms) to sudden unexpected noise, movement, or touch.

What is exaggerated startle reflex?

Definition. An exaggerated startle reaction in response to a sudden unexpected visual or acoustic stimulus, or a quick movement near the face. [ from HPO]

When does Moro reflex start to fade?

Moro or "startle" reflex

He may even cry loudly. The Moro reflex, which is present in varying degrees in different babies, peaks during the first month and then disappears after two months.

What does the Moro reflex test for?

Is Hypertonia genetic?

This condition can be inherited in an autosomal dominant pattern, which means a mutation in one copy of any of the associated genes in each cell is sufficient to cause the disorder. In some cases, an affected person inherits the mutation from one affected parent . Other cases may result from new mutations in the gene.

The exaggerated startle reflex in HPX is probably caused by brainstem pathology. This is supported by the concentration of glycine receptors in the brainstem and spinal cord (Rousseau et al., 2008). In addition, symptomatic excessive startling is usually caused by brainstem damage (Bakker et al., 2006).

Definition. An exaggerated startle reaction in response to a sudden unexpected visual or acoustic stimulus, or a quick movement near the face. [ from HPO]

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