Scalene Muscles Trigger Points and Thoracic Outlet Syndrome
The scalene muscles are three paired muscles of the neck, located in the front on either side of the throat, just lateral to the sternocleidomastoid. There is an anterior scalene (scalenus anterior), a medial scalene (scalenus medius), and a posterior scalene (scalenus posterior). They derive their name from the Greek word skalenos and the later Latin scalenus meaning “uneven”, similar to the scalene triangle in mathematics, which has all sides of unequal length.
Trigger points in the scalenes can be a source of interscapular pain (pain between the shoulder blades) and medial scapular border pain. This may be blamed on the rhomboid muscles. They may also refer pain to the chest, which can be mistaken for angina.