What's the upper trapezius?

upper trapezius

-Nerve: accessory nerve (motor)

-Actions: scapula elevation

-origin occipital bone, the nuchal ligament on upper cervical spinous processes

-insertion outer third of clavicle, acrominon process

& Explanation:

The trapezius is one of the upper back muscles. It is a large triangular muscle that runs from the occipital bone in the skull to the thoracic spine in the back. It extends to the width of the shoulders. The muscle separates into three sections: the superior, middle, and inferior

The trapezius is a broad, flat, superficial muscle extending from the cervical to thoracic region on the posterior aspect of the neck and trunk. The muscle is divided into three parts: descending (superior), ascending (inferior), and middle[1]. The muscle contributes to scapulohumeral rhythm through attachments on the clavicle and scapula, and to head balance through muscular control of the cervical spine.