STNR (Retained Primitive Reflexes)
The STNR (Symmetrical Tonic Neck Reflex) is a developmental reflex that helps babies transition into crawling. When retained beyond infancy, it can contribute to poor posture, difficulty sitting still, handwriting fatigue, coordination challenges, and reduced focus. This article explains the signs of retained STNR in children and adults—and how nervous system-focused chiropractic care can support improved stability, motor control, and regulation.