The base of the scull at the medial third of the superior nuchai line and the external occipital protuberance. And from the Ligamentum nuchae and the spinous process of the thoracic verebrae. Upper Traps: lateral third of the clavicle.
Which is the insertion of the trapezius?
Insertion. The muscle inserts on the lateral third of clavicle, acromion, and spine of scapula.
How many origins does the trapezius muscle have?
Origin and insertion
The trapezius muscle has several origin points along the midline of the posterior neck and back. The superior fibers attach on the medial third of the superior nuchal line and the external occipital protuberance of the occipital bone.
Where does the lower trapezius originate?
They found that the lower trapezius originates on the spine and extends from T2 to T12 and inserts onto the spine of the scapula from the acromian process to its root. It is closely aligned to the middle trapezius which attaches to the C7 and T1 vertebrae, and this also attaches to the spine of the scapula.
What is the origin and insertion of the levator scapulae?
Origin and insertion
Levator scapulae originates from the transverse processes of the first four cervical vertebrae. The muscle fibers descend laterally to insert at the superior angle and medial border of scapula, between the superior angle and base of the spine of scapula.
What is the origin and insertion of the latissimus dorsi?
Origin of the latissimus dorsi is from spinous processes of thoracic T7–T12, thoracolumbar fascia, iliac crest and inferior 3 or 4 ribs, inferior angle of scapula and insertion on floor of intertubercular groove of the humerus.
What region is the trapezius located?
The trapezius is one of the broadest and most superficial (closest to the skin) muscles of the upper back and trunk, meaning upon dissection of a cadaver it is often used as a landmark because it is encountered first. This muscle is triangular, broad, and thin and covers the upper back of the shoulders and neck.
What is the origin of Sternocleidomastoid?
Sternocleidomastoid Attachments
It originates on the anterior surface of the manubrium, and the superior border and anterior surface of the medial third of the clavicle. The SCM converges into one point and inserts on the lateral surface of the mastoid process and the nuchal line of the occipital bone.
What is the origin and insertion of the supraspinatus muscle?
The supraspinatus muscle originates from the supraspinous fossa, which is a concave surface at the top of the scapula. From the supraspinous fossa of the scapula, the supraspinatus muscle then extends laterally (outward) and inserts onto the humerus, which is the long bone that makes up the upper arm.
What is the origin and insertion of the deltoid?
The deltoid is a thick, triangular shoulder muscle. It gets its name because of its similar shape to the Greek letter ‘delta’ (Δ). The muscle has a wide origin spanning the clavicle, acromion and spine of scapula. It passes inferiorly surrounding the glenohumeral joint on all sides and inserts onto the humerus.
What is the origin of the rhomboid major?
Origin & Insertion
The rhomboid major is quadrangular muscle located inferior to the rhomboid minor. The origin of the rhomboid muscles is from the spinous processes of the T2-T5 vertebra and inserts on the medial border of the scapula, just inferior to the rhomboid minor.
What is the origin and insertion of the pectoralis minor?
It originates from the margins of the third to fifth ribs adjacent to the costochondral junction. The fibers consequently pass upward and laterally to insert into the medial border and superior surface of the coracoid process of the scapula.
What is the origin insertion and action of the serratus anterior?
The serratus anterior is a muscle that originates on the surface of the 1st to 8th ribs at the side of the chest and inserts along the entire anterior length of the medial border of the scapula. The serratus anterior acts to pull the scapula forward around the thorax.
What is the origin of the subscapularis muscle?
The subscapularis muscle originates at the subscapular fossa and inserts into the lesser tubercle of the humerus. The muscle internally rotates and adducts the humerus.
What is the origin of serratus anterior?
The serratus anterior (SA) is a fan-shaped muscle that originates on the superolateral surfaces of the first to eighth or ninth ribs at the lateral wall of the thorax and inserts along the superior angle, medial border, and inferior angle of the scapula.
What is the origin of the Subclavius?
The subclavius muscle originates by a strong tendon from the sternal end of the 1st rib, near its articulation with the costal cartilage. The tendon spreads superolaterally into a muscle belly that inserts into the lower surface of the middle third of the body of clavicle (groove for subclavius muscle).
