04/06/2026
Do you have a hypervigilant baby? ⚠️
When my babes were small, they startled SO easily and dramatically, right from birth… you know, that reflex where babies suddenly fling their arms out, giving themselves a fright?
Sometimes they’ll go right back to sleep, but often (always in the case of my boys) they’ll start to cry. Sleep time over 😭.
This response, is of course, the reason babies are sometimes swaddled to keep them sleeping longer without startling themselves, but if it’s a natural reflex, why does it need to be suppressed? And why does the response seem so much stronger in some babies?
This is an example of a primitive reflex and it’s an important stage in development. Although the response I mentioned is often referred to as the startle reflex 📢, technically it’s the Moro reflex. This reflex is triggered in response to the sensation of falling (which is way it can be so hard to set down a sleeping baby although they may be happy sleeping in arms) or sudden stimuli like a loud noise.
❓ What are Primitive Reflexes and Why do they Matter?
Primitive reflexes are involuntary patterns of movement that are controlled by the brainstem. In a newborn baby, these reflexes allow for the fundamentals of survival… the instincts involved in birth, breastfeeding, responding to stimuli etc. Each reflex is important and acts as a building block in development.
In a typical developmental progression, these reflexes begin to ‘integrate’ as the baby practices them and gradually transitions to more consciously aware movement patterns. Although these reflexes don’t ‘disappear’ they cease to be in the driver’s seat so to speak.
❌ When these reflexes are ‘retained’ (remain active) there are a raft of possible consequences affecting our learning processes, sensory perception and emotional responses.
Possible reasons for retention of primitive reflexes include emotional stress, chronic illness and pregnancy or birthing complications. There isn’t always an obvious reason and retained reflexes are not usually a sign of ‘bad parenting’.
Interestingly many behaviours and sensory challenges commonly associated with retained reflexes like the Moro are also associated with ADHD and autism. Think hyperactivity, fidgeting, hypersensitivity to light, sound or touch, volatile emotional responses, challenges with focus, fine and/or gross motor control………………
🧠 So what’s going on? Are the symptoms of autism/ADHD a result of retained reflexes or are neurodivergent kids more inclined to retain reflexes due to pre-existing differences like more sensitive nervous systems? It’s a bit of a chicken and egg scenario and, of course, will vary from individual to individual along with a whole host of other factors. In a practical sense it makes sense to try working with the reflexes and see whether there are beneficial changes! The great news is that suboptimal integration can be addressed at any age!
🌼 Integration of primitive reflexes can be addressed as part of kinesiology sessions along with simple exercises that can be done at home. Contact me to find out more! www.kirstymariedenny.com