What is the function of trapezius muscle?
The trapezius is a muscle that starts at the base of your neck, goes across your shoulders and extends to the middle of your back. The trapezius (traps muscle) helps you move your head, neck, arms, shoulders and torso. It also stabilizes your spine and helps with posture.
What are the 3 actions of trapezius to scapula?
Action
- Descending part: elevates pectoral girdle.
- Middle part: retracts scapula.
- Ascending part: depresses shoulders.
- Descending and ascending together: rotates scapula upwards.
- Bilateral contraction: extends neck.
- Unilateral contraction: Ipsilateral side flexion of neck.
What is the function of the lower trapezius?
The lower trapezius is one muscle that plays an important role in scapula movement and positioning, and also dynamic scapula stability. The functional scapula motions of upward rotation, posterior tilt, and external rotation increase the width of the subacromial space during humeral elevation.
What nerve supplies the trapezius muscle?
The accessory nerve
The accessory nerve provides the main motor input to the trapezius muscle, but preservation of the C2-C4 branches to the muscle during modified neck dissection should improve outcomes.
What is the action of the trapezius muscle quizlet?
Location: Deep to trapezius in upper back located between the vertebrae and scapula, and superior to rhomboid major. Action: Elevates and adducts scapula and rotates it downward, stabilizes scapula.
What is the antagonist of the trapezius muscle?
| Trapezius | |
|---|---|
| Antagonist | serratus anterior muscle, Latissimus dorsi, Pectoralis Major |
| Identifiers | |
| Latin | Musculus trapezius |
| TA98 | A04.3.01.001 |
What movement does the trapezius perform?
Function. The main function of the trapezius is stabilizing the scapula in its anatomical place, as well as controlling it during movements of the shoulder and upper limb. The throwing action is a common manoeuvre in which the trapezius muscle is active, along with the deltoid muscle and the rotator cuff muscles.
What is the bilateral action of the trapezius?
Bilateral contraction of the descending part of trapezius (i.e. when both left and right muscles contract) causes an extension of the head and neck.
What is the trapezius quizlet?
Trapezius Origin: Clavicle, acromion process and spine of scapula. Trapezius Insertion: Elevates clavicle, adducts, elevates, and depresses scapula, rotates scapula upward, extends neck and shoulder fixed.
What is the function of the sternocleidomastoid muscle quizlet?
The sternocleidomastoid muscle is a two-headed neck muscle, which true to its name bears attachments to the manubrium of sternum (sterno-), the clavicle (-cleido-), and the mastoid process of the temporal bone (-mastoid). Flexes neck ; rotates head.
Is the pectoralis major an agonist?
The pectoralis major: agonistic: anterior deltoid, latissimus dorsi, teres minor, infraspinatus, pectoralis minor, serratus anterior. antagonistic: middle deltoid, lower trapezius, middle trapezius, posterior deltoid, levator scapulae, rhomboid major, rhomboid minor, supraspinatus, upper trapezius.