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An example of trapezius function is an overhead press. When activating together, the upper and lower fibers also assist the middle fibers (along with other muscles such as the rhomboids) with scapular retraction/adduction. The trapezius also assists in abduction of the shoulder above 90 degrees by rotating the glenoid upward.
The spinal component of the accessory nerve provides motor control of the sternocleidomastoid and trapezius muscles. [8] The trapezius muscle controls the action of shrugging the shoulders, and the sternocleidomastoid the action of turning the head. [8] Like most muscles, control of the trapezius muscle arises from the opposite side of the ...
The five muscles that comprise the function of the shoulder girdle are the trapezius muscle (upper, middle, and lower), levator scapulae muscle, rhomboid muscles (major and minor), serratus anterior muscle, and pectoralis minor muscle. [3]
Alternatively, or in addition to intraoperative procedures, postoperative procedures can also help in recovering the function of a damaged spinal accessory nerve. For example, the Eden-Lange procedure, in which remaining functional shoulder muscles are surgically repositioned, may be useful for treating trapezius muscle palsy. [4] [5]
Muscle strength deficits in the lower trapezius muscles are also a common clinical finding in patients with rounded shoulders as it has been speculated to restrict zygapophyseal extension in the middle to lower thoracic spine. [36] Therefore, RSP treatment often targets the symptoms or root causes associated with these problem areas.
Lower limb, gluteal, lateral rotator group, Left/right ischiopubic ramus, obturator membrane: medial surface of greater trochanter of femur: nerve to obturator internus (L5, S1, S2) abducts & rotates laterally thigh, stabilises hip during walking: 2 1 inferior gemellus: Lower limb, gluteal, lateral rotator group, Left/right ischial tuberosity
Antagonists to this function (upward rotators of the scapulae) are the serratus anterior and lower fibers of the trapezius. If the lower fibers are inactive, the serratus anterior and upper trapezius work in tandem with rhomboids and levators to elevate the entire scapula.
The trapezius is attached to the superior lip, and a rough tubercle is generally seen on that portion of the spine which receives the tendon of insertion of the lower part of this muscle. The deltoideus is attached to the whole length of the inferior lip.