What Is the Symmetric Tonic Neck Reflex?

The symmetric tonic neck reflex (STNR) is a primitive reflex that is present in infants. It is characterized by the extension (straightening) of one arm and flexion (bending) of the opposite arm when the head is turned to one side. The STNR is thought to help infants maintain their balance and control their head movements. It is also thought to play a role in the development of motor skills.

The STNR is typically present in infants from birth to about 6 months of age. It gradually diminishes as the infant develops more control over their head and body movements. If the STNR is still present after 6 months of age, it may be a sign of a developmental delay.

There are a few things that can cause the STNR to be delayed or absent. These include:

* Prematurity

* Cerebral palsy

* Down syndrome

* Other neurological conditions

If you are concerned about your infant's development, talk to your doctor. They can assess your infant's reflexes and determine if there is a problem.

Here are some ways to help your infant develop their motor skills:

* Encourage them to tummy time every day.

* Provide them with toys that encourage them to reach and grasp.

* Help them to sit up and stand.

* Talk to them and encourage them to make noise.

* Play with them and help them to learn new things.

By following these tips, you can help your infant reach their full potential.