Skip to Content

startle reflex

 

Definition: a primitive reflex response observed in the normal newborn but typically suppressed by 3–4 months of age. Any sudden stimulus (a loud noise, a blow to the supporting surface, or being dropped 5–10 cm through space) causes flexion of the hip and knee joints with fanning of the fingers followed by fist clenching and extension of the upper limbs followed by flexion.

Synonym(s): Moro reflex, parachute reflex, startle reaction

See Also: cochleopalpebral reflex

Disclaimer: This site is designed to offer information for general educational purposes only. The health information furnished on this site and the interactive responses are not intended to be professional advice and are not intended to replace personal consultation with a qualified physician, pharmacist, or other healthcare professional. You must always seek the advice of a professional for questions related to a disease, disease symptoms, and appropriate therapeutic treatments.
© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
Hide