If you&;ve got headaches or neck pain that won&;t seem to go away even with treatment? Did you know your jaw could be the cause?.Temporalis. .The Temporalis is another muscle of mastication – or chewing. This muscle is responsible for assisting in closing the jaw along with the masseter. If you grind your teeth at night (bruxism) this muscle and the masseter will definitely have a fun triggerpoint or knots in them. To muscle test it:.Put your fingers in front of your ear and up on your hair and you&;ll feel the muscle pop out when you clench your teethIf you have pain directly under your hand or find any harder points it&;s your Temporalis. . Next up is the self release for it. series