Which muscle is tight in upper cross syndrome?

Prepare for your Movement Science Midterm Test with flashcards and multiple choice questions, each with hints and explanations. Boost your exam readiness!

Upper cross syndrome is driven by a pattern of muscle imbalance where the chest muscles shorten and the upper back/neck stabilizers weaken, leading to rounded shoulders and forward head posture. The pectoral muscles becoming tight is a hallmark of this pattern because they pull the shoulders forward and tilt the scapula anteriorly, promoting protraction and altered shoulder mechanics. Among the options, the pectorals best explain the primary tightness that drives that posture. The levator scapulae can also be tight and contribute to neck and shoulder elevation, but the chest muscles are the main tight group in this pattern. Rhomboids are usually weak and lengthened rather than tight, and suboccipitals are not the defining tightness for upper cross syndrome among these choices.