Definition: If you place your baby on his back, he will look like a little fencer. His head will turn with the arm and leg of one side extended (the pair on the side he’s turned toward) and his other arm and leg will be flexed.
This reflex can be present up to about 6 months of age or about the time your baby begins rolling over (back-to-stomach) competently and regularly. It’s thought that this reflex helps prevent a baby from rolling over onto his stomach before his brain and body are ready. This is another good reason why putting your baby on his back to sleep is important.
If your baby never exhibits this reflex, talk to your health care provider at the next check-up. Sometimes a trained eye can help you spot this one a little better. If, on the other hand, your baby is in this position the majority of the time, contact your health care provider immediately as it could be a sign of a larger neurological problem.
Also Known As: Tonic Neck Reflex. (Though your partner might think it’s very funny and call it Captain Morgan’s Reflex.)
