For scapular upward rotation to occur, scapular downward rotator musculature must lengthen. If scapular downward rotation muscles are tight, they might not be flexible enough to allow for scapular upward rotation, thereby causing shoulder impingement syndrome to occur.
A tension headache is caused by excessive pulling force of tight muscles in the back of the neck that exert tension on their attachments on the head.
Forward head posture is extremely common, especially as we age. It is part of a larger posture dysfunctional pattern known as upper crossed syndrome.
To perform orthopedic manual therapy to the neck that is accurate and specific, we need to know the attachments and actions of the muscles of the neck.