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Oct 30, 2023 · The trapezius muscle is the only muscle of the upper limb that does not receive its innervation from the brachial plexus. Instead, motor innervation to the trapezius is conveyed by the accessory nerve (CN XI) as well as the anterior rami of the C3 and C4 spinal nerves, which also contain proprioceptive/sensory fibers from the muscle.
Jun 29, 2023 · Also known as traps, the trapezius muscles play an important role in posture. They move the shoulders, lift arms out to the side, and protect the neck and spine. You use them when you shrug or pull your shoulders back. This article explains the anatomy and function of the trapezius muscles.
Your trapezius muscles are two big muscles on either side of your upper back. They help you move your head, neck and upper back, and maintain and adjust your posture. Overuse, injuries and nerve damage are the most common causes of trapezius muscle pain. Contents Overview Function Anatomy Conditions and Disorders Care.
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 human trapezius muscle has an origin that is more extensive than that of any other body muscle. The muscle is divided into three parts: descending (superior), ascending (inferior), and middle.
The trapezius muscle (pl.: trapezii) is a surface muscle of back, shown in red above and below. The trapezius[4] is a large paired trapezoid -shaped surface muscle that extends longitudinally from the occipital bone to the lower thoracic vertebrae of the spine and laterally to the spine of the scapula.
Jan 18, 2023 · The trapezius is an extrinsic muscle of the shoulder. It is a broad, flat and triangular shape – forming a trapezoid shape in combination with the contralateral side. Attachments: Originates from the skull, nuchal ligament and the spinous processes of C7-T12.
Jul 11, 2023 · What is the trapezius muscle - upper, middle, lower trapezius origin, insertion, location, attachment, function, antagonist, nerve & blood supply, & diagram
Jan 20, 2018 · The trapezius elevates, depresses, rotates, and retracts the scapula, or shoulder blade. Innervation of the trapezius is derived from the spinal accessory nerve.
Nov 10, 2023 · The trapezius, traps, trapezoid muscle is in the upper back and helps the neck, shoulders, and arms move. Learn more about the causes and treatment of trapezius pain.
Apr 17, 2021 · Motor (movement) functions are supplied by the spinal root of the accessory nerve. For pain and proprioception (sense of position), sensory functions are provided by cervical nerves C3 and C4. The accessory nerve provides trapezius motor innervation. The trapezius muscle does not work alone.
