UPPER-CROSSED SYNDROME

UPPER-CROSSED SYNDROME - Upper-Crossed Syndrome (UCS) is also referred to as proximal or shoulder girdle crossed syndrome. In UCS, tightness of the upper trapezius and levator scapula on the dorsal side crosses with tightness of the pectoralis major and minor. Weakness of the deep cervical flexors ventrally crosses with weakness of the middle and lower trapezius. This pattern of imbalance creates joint dysfunction, particularly at the atlanto-occipital joint, C4-C5 segment, cervicothoracic joint, glenohumeral joint, and T4-T5 segment. Specific postural changes are seen in UCS, including forward head posture, increased cervical lordosis and thoracic kyphosis, elevated and protracted shoulders, and rotation or abduction and winging of the scapulae.

The “crossed” in upper crossed syndrome refers to the crossing pattern of the overactive muscles with the countercrossing of the underactive muscles. When viewed from the side, an X pattern can be drawn for these two sets of muscles. The overactive muscles form a diagonal pattern from the posterior neck with the upper trapezius and levators down and across to the anterior neck and shoulder with the sternocleidomastoid (SCM) and pectoralis major. The other side of the X now depicts the underactive muscles, with the deep cervical flexors down toward the mid/lower trapezius, rhomboids and serratus anterior. As we continually assume the seated, forward head postures driven by electronic devices or poor exercise selection and technique, this X pattern of muscle imbalances will increase.