Where is Spinotrapezius located?
Spinotrapezius, also called thoracic trapezius, is the most posterior of the three trapezius muscles. It is triangular shaped. Posterior to the acromiotrapezius and overlaps latissimus dorsi on the front. Its origin is the neural spines of the thoracic vertebrae and its insertion is the scapular fascia.
What is the origin of the Acromiotrapezius?
Acromiotrapezius is the middle trapezius muscle. It covers the dorsal and lateral surfaces of the scapula. Its origin is the neural spines of the cervical vertebrae and its insertion is in the metacromion process and fascia of the clavotrapezius.
Do humans have a Spinotrapezius?
clavotrapezius, acromiotrapezius, spinotrapezius – three muscles in cat, one muscle in human (trapezius).
Where does the Clavodeltoid insert?
Clavobrachialis (Clavodeltoid) – This flat, thin muscle which covers the anterior portion of the shoulder and arm is a continuation of the clavotrapezius. It originates in the clavicle and inserts into the ulna near the elbow.
What is the action of Spinotrapezius?
The spinotrapezius arises from the spinous processes of thoracic vertebrae and inserts on the fascia covering the scapular muscles. Its action is to adduct the scapula and pull it posteriorly. The major muscle group of the shoulder is the deltoid group.
What is the function of the Clavobrachialis?
This is one of the five muscles in the group we refer to as the muscles that move the arm (not including the rotator cuff muscles).
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 function of the Pectoantebrachialis?
The major action of these muscles is adduction of the forelimb (i.e. the front leg is drawn toward the midline). There are four subdivisions of the pectoral group in the cat. The pectoantebrachialis is the most superficial muscle of the pectoral group.
What is the action of Spinotrapezius in cat?
The spinotrapezius arises from the spinous processes of thoracic vertebrae and inserts on the fascia covering the scapular muscles. Its action is to adduct the scapula and pull it posteriorly.
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 is the insertion of levator scapula?
Insertion. The levator scapulae inserts on to the vertebral margin of the scapula between the superior angle and the root of the spine.
What is the origin insertion and action of the serratus anterior?
Anatomical terms of muscle 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 muscle does the Spinotrapezius adduct?
The spinotrapezius arises from the spinous processes of thoracic vertebrae and inserts on the fascia covering the scapular muscles. Its action is to adduct the scapula and pull it posteriorly. The major muscle group of the shoulder is the deltoid group.
What is the origin and insertion of the trapezius?
Both drawings are for the entire muscle and includes the origin and insertion for all three divisions of the trapezius muscle . Notice that part of the origin is on a ligament called the ligamentum nuchae, and this portion of the origin is represented by a line between the skull and the spinous process of C7.
What is the difference between the Spinotrapezius and clavodeltoid?
The spinotrapezius arises from the spinous processes of thoracic vertebrae and inserts on the fascia covering the scapular muscles. Its action is to adduct the scapula and pull it posteriorly. The major muscle group of the shoulder is the deltoid group. The clavodeltoid originates from the clavicle and inserts on…
What is the action of the acromiotrapezius?
Its action is to extend the humerus in a forward direction. The acromiotrapezius (which arises on the middorsal line of the neck and thorax and inserts on the metacromion and spine of the scapula) adducts the scapula. The spinotrapezius arises from the spinous processes of thoracic vertebrae and inserts on the fascia covering the scapular muscles.