The symmetrical tonic neck reflex (STNR) plays an important role in concentration. It is therefore important to ensure that this reflex is properly integrated when your child is at school.
The function of the STNR is as follows:

• when the head is bent down: the arms bend and the legs stretch
• lorsque la tête est relevée vers le haut : les bras se tendent et les jambes se plient

From the prone position, the STNR helps the baby to sit up and get on all fours. It is therefore essential for the development of crawling, which favours lateral movements and left-right independence. It is also responsible for that funny situation when the baby falls asleep with his buttocks up but his head resting on the floor.

Observation

This reflex is quite easy to observe. Get down on all fours and nod slowly. If your arms or legs move when you move your head, your STNR is still active.

Consequences of non-integration

The most problematic consequence takes place at school when copying what is written on the board. When the young student raises his or her head to look at the board, the STNR induces bending of the legs and extension of the arms. Conversely, when the head is lowered to write, the arms are bent and the legs are stretched! The back and forth between paper and board forces your child to constantly control his STNR. This forced control of the reflex involves an expenditure of energy and concentration. Generally, during the first few lessons of the morning, the STNR does not pose a problem, but in the afternoon, when fatigue begins to be felt, it becomes increasingly difficult to control it. For this reason, some students who still have STNR activated are more focused and perform better in the morning.

Integration exercises

Paul Landon (THE French reference on archaic reflexes) has created an excellent video with several exercises to integrate his STNR:

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