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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.
The trapezius 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.
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.
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.
Jun 3, 2021 · The trapezius is responsible for posture and movement. It allows you to tilt your head up and down and turn your head all around. It also helps you stand up straight, twist your torso and shrug your shoulders or pull them back. The trapezius controls your scapula (shoulder blade) when you lift your arm or throw a ball.
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.
Mar 11, 2023 · The trapezius muscle is a large superficial back muscle that resembles a trapezoid. It extends from the external protuberance of the occipital bone to the lower thoracic vertebrae and laterally to the spine of the scapula. The trapezius has upper, middle, and lower groups of fibers.
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.
Lateral third of clavicle, acromion, and spine of scapula. Action. Elevates retracts, and rotates scapula; superior fibers elevate, middle fibers retract, and inferior fibers depress scapula; superior and inferior fibers act together in superior rotation of scapula. Innervation.
