crossed extension reflex (foot reflex)

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This is a primitive reflex that is usually is only present until one month of age. The examiner holds one of the baby's legs extended and applies firm pressure to the sole of the foot of the same leg. The baby's free leg flexes, adducts and then extends. The adduction component of the reflex is generally only present after 36 weeks gestation.

Last reviewed 01/2018

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