What is trapezius pars Descendens?
The trapezius has three functional parts: an upper (descending) part which supports the weight of the arm; a middle region (transverse), which retracts the scapula; and a lower (ascending) part which medially rotates and depresses the scapula.
What is the insertion of trapezius M?
Trapezius Attachments It originates on the occipital bone, the ligamentum nuchae, and the spinous processes of T01–T12. The trapezius inserts on the lateral third of the clavicle, as well as the acromion and scapular spine of the scapula.
What vertebrae does trapezius attach to?
Origin. The muscle attaches to the medial third of superior nuchal line; external occipital protruberance, nuchal ligament, and spinous processes of C7 – T12 vertebrae.
What nerve innervates the trapezius muscle?
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 do traps do?
The trapezius, commonly referred to as the traps, are responsible for pulling your shoulders up, as in shrugging, and pulling your shoulders back during scapular retraction.
What is the origin and insertion of the supraspinatus muscle?
Supraspinatus is located deep to the trapezius muscle in the posterior scapular region, extending from the supraspinous fossa of scapula to the proximal humerus….Supraspinatus muscle.
| Origin | Supraspinous fossa of scapula |
|---|---|
| Insertion | Greater tubercle of humerus |
Where are traps located?
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.
What does the trapezius Cervicalis do?
The middle portion of the trapezius muscle arises from the seventh cervical and the first six thoracic vertebrae. These fibers insert into the acromion and the scapular spine. The function of these fibers is to retract the shoulder.
Which is part of the trapezius causes the extension of the neck?
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. The ascending (lower) fibers are responsible for depression of the medial part of the scapula, and thus lowering the shoulder.
Where is the anterior margin of the trapezius muscle?
The upper part of the trapezius also overlies the suboccipital region . The anterior margin of the trapezius muscle forms the posterior border of the posterior triangle of the neck.
What does the trapezius do to the body?
The trapezius elevates, depresses, rotates, and retracts the scapula, or shoulder blade. With patient (pt.) standing: abduct shoulders to 90 degrees and retract shoulder girdle. Slightly bend the trunk forward so antigravity.
When does the descending part of the trapezius contract?
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.