What is the insertion of the shoulder muscle?
Summary
| Muscle | Origin | Insertion |
|---|---|---|
| Deltoid | Lateral ⅓ clavicle + acromion & the spine of the scapula | Deltoid tuberosity |
| Teres major | Inferior angle of the scapula | Medial lip of bicipital groove |
| Rotator cuff muscles | ||
| Supraspinatus | Supraspinous fossa | Greater tubercle |
What is the origin and insertion of deltoid?
The deltoid muscle originates from the lateral part of the clavicle (collarbone), as well as the spine and acromion process of the scapula (shoulder blade). From these points of origin, the muscle then travels down the arm and inserts on the deltoid tuberosity of the humerus (long bone of the upper arm).
What is the common insertion site of the rotator cuff muscles?
Anatomy
| Origen on scapula | Insertion on humerus | |
|---|---|---|
| M. infraspinatus | infraspinous fossa | middle facet of greater tuberosity |
| M. teres minor | lateral border of scapula | inferior facet of greater tuberosity |
| M. subscapularis | subscapular fossa | lesser tuberosity or humeral neck |
What is the origin and insertion of the shoulder?
Origin: Entire under surface of the scapula (subscapular fossea). Insertion: Less tubercle of the humerus. Actions: Internal rotation, Adduction, Extension and stabilization of the glenohumeral joint.
How many muscles attach to the shoulder?
eight muscles
Also called the glenohumeral joint, it has more range of motion than any other joint in your body. There are about eight muscles in your shoulder that support this joint. They give it strength, stability and shape. Your shoulder muscles are skeletal muscles.
What is the insertion of deltoid?
Deltoid muscle
| Origins | Lateral 1/3 of Clavicle (clavicular part), Acromion (acromial part), Spine of Scapula (spinal part) Mnemonic: ‘Deltoid helps you carry SACS’ |
|---|---|
| Insertion | Deltoid tuberosity of humerus |
| Innervation | Axillary nerve (C5, C6) |
Where does the deltoid attach?
Tendons connect each of the three side to bones. The base of the deltoids connects to the upper part of your scapula (shoulder blade) and the side of your clavicle (collarbone). The point of the deltoids attaches to the side of your humerus (the arm bone between your shoulder and elbow).
Is infraspinatus anterior or posterior?
The infraspinatus is involved in anterior-posterior force balance as the infraspinatus provides the posterior force, and the subscapular provides the anterior force.
What is origin and insertion of muscles?
A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. If the place is a bone that remains immobile for an action, the attachment is called an origin. If the place is on the bone that moves during the action, the attachment is called an insertion.
What are the attachment points for latissimus dorsi?
The muscle has attachments to the lower six vertebral spinous processes anterior to the attachment of the trapezius on the spinous processes. Through the thoracolumbar fascia latissimus dorsi attaches to the lumbar and sacral spinous processes (T6 to S5 levels), and the supraspinous ligament.
What are the points of origin and insertion for the latissimus dorsi muscle?
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.