TheSir
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- Joined
- Jan 6, 2019
- Messages
- 1,952
I'll try to simplify the dynamic (I'm a bit sleep deprived so humor me). When you're...Yes, but you said to do the chin tuck, and then additionally lower your mandible, right?
And what do you mean "try to habitually engage"? Do you mean to just do the chin tuck habitually, or to have the anterior neck muscles engaged/flexed even when not chin tucking?
1) engaging the posterior tongue correctly (the nature of which should be closer to suction than a deliberate upward push. The suprahyoid muscles residing on the underside of your jawline shouldn't tense up much)
2) straightening out your neck (and spine at large)
...your lower jaw should end up being pushed downward due to the tongue using it as leverage. In addition, the downward movement may have a backward or a forward vector depending on your current occlusion, posture and cranial structure. Forget about conscious chin tucking for now, it should occur pretty automatically when all the other criteria are met.
As your jaw is being pushed downward by the tongue, it'll eventually meet resistance at the anterior neck musculature, which will prevent the jaw from descending much further. As such, an equilibrium of forces will be born:
1) the tongue pushing the jaw downwards
2) the neck musculature resisting this push.
The mandible would come to sit at a balanced half-way point between these two forces. As such, this mandibular positioning shouldn't feel particularly straining, but rather intuitive and effortless. By habitual I mean that this dynamic which I'm trying to explain should be adopted as a natural part of your overall body posture. I hope that clears things up.