tight neck extensor musculature can cause tension headaches

Tension Headaches

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.

Locked short muscles / locked long muscles in upper crossed syndrome and lower crossed syndrome

Locked Short Muscles – Locked Long Muscles

Two opposing muscle groups, the “facilitated” muscles that are locked short and the “inhibited” muscles that are locked long.