08/02/2024
Repost Dr Steven Lin
If you or a family member breathes through the mouth you can likely spot postural giveaways.
As a patient walks into our surgery, we can often tell if there is a breathing problem just by a quick once over.
The side neck muscle or sternocleidomastoid muscle pictured above is responsible for the mechanical action in the majority of the head movements. It's also an accessory muscle for respiration.
When the muscle is overactive, it's a sign the patient uses shallow breathes as the muscle can be used to life the upper chest.
Poor breathing means poor posture and inability to recruit primary respiratory muscles.
Forward head posture is another giveraway and is comon. Cell phones don't help, but real cause is poor breathing.
The anterior throat muscles (Supra- & Infrahyoid group) assist in balancing the jaw against the muscles of mastication, as well as flexing the neck when rising from a supine position.
In a forward head posture, these muscles, along with the longus colli tend to be stretched out and weak (see the picture), which leads to increased load on the SCM muscles.
In turn, this stretching causes mandibular depression which then forces the the mandibular elevator muscle group to create a sustained contraction in order to keep the mouth closed.
You can often observe this with overactive chin muscles due to the lower lip pursing to seal the motuh.
Overall, this leads to altered TMJ Joint mechanics, trigger points in the involved muscle groups, and painful guarding all leading to what is commonly referred to as TMJ Dysfunction.
If your SCM bothers you try this exercise:
1) Sit or stand facing forward.
2) Exhale as you slowly tilt your right ear down toward your shoulder.
3) Use your right hand to apply gentle pressure to your head to deepen the stretch.
4) Hold for a few breaths, feeling the stretch on the side of your neck down to your collarbone.
To follow these mouth body tips you can listen to my podcast on Itunes and Spotify.
Do suffer from forward head posture or mouth breathing?