What is the function of the scapula spine?
What is the function of the scapula spine?
The scapula stabilizes the arm and neck The scapula, better known as the shoulder blade, is a triangular bone that serves as a joining force between the clavicle and the humerus. This bone is located posteriorly (on the back half of the body).
What are the functional stabilizers of the scapula?
Dynamic stabilizers include the rotator and scapular stabilizers (ie, teres major, rhomboids, serratus anterior, trapezius, levator scapula). The rotator cuff is composed of 4 muscles: the supraspinatus, infraspinatus, subscapularis, and teres minor.
What is the function of Scapulothoracic joint?
The scapulothoracic joint allows for the complex scapular movements in relation to the thoracic cage: elevation and depression, protraction and retraction, and medial and lateral rotation.
What is the scapula in anatomy?
The scapula is a flat, triangular-shaped bone (colloquially as the “shoulder blade”). It is located in the upper thoracic region on the dorsal surface of the rib cage. It connects with the humerus at the glenohumeral joint as well as the clavicle at the acromioclavicular joint to form the shoulder joint.
What muscles attach to the spine of the scapula?
Attachments
- supraspinous fossa: supraspinatus muscle.
- infraspinous fossa: infraspinatus muscle, teres minor muscle.
- subscapular fossa: subscapularis muscle, serratus anterior.
- transverse scapular ligament and adjacent superior border of blade: inferior belly of omohyoid.
- acromion: acromial part of deltoid muscle, trapezius.
What level of the spine is the scapula?
Scapula – posterior aspect The medial end of the spine, the root of the spine, lies at the level of the spinous process of the third thoracic vertebra. The spine of scapula and the acromion are subcutaneous and are palpable.
What are the 5 scapular stabilizing muscles?
The main scapular stabilizer muscles include:
- serratus anterior.
- rhomboids.
- levator scapulae.
- trapezius muscles.
How do you stabilize the scapula?
5 Scapular Stabilization Exercises for Strong Shoulders
- ITYWs.
- Scapular pushups.
- Band pull-aparts.
- Wall ball circles.
- Advanced stability ball pushups.
What is Scapulothoracic dysfunction?
Scapulothoracic dysfunction refers to the movement of the shoulder blade with the rib cage.
What are the two main functions of the Scapulothoracic articulation?
There are 17 muscles that attach to or originate on the scapula (see Table 1 below), and they perform two major roles: (1) to maintain a stable base of support for the humerus and (2) to allow for dynamic positioning of the glenoid fossa during glenohumeral elevation.
What muscles attach to the scapular spine?
Function
| Muscle | Direction | Region |
|---|---|---|
| Levator Scapulae | insertion | medial border |
| Trapezius | insertion | spine of scapula |
| Deltoid | origin | spine of scapula |
| Supraspinatus | origin | supraspinous fossa |
Which is the best description of the scapular spine?
scap·u·la. A large, triangular, flattened bone lying over the ribs, posteriorly on either side, articulating laterally with the clavicle at the acromioclavicular joint and the humerus at the glenohumeral joint. It forms a functional joint with the chest wall, the scapulothoracic joint. Synonym(s): shoulder blade.
How is the infraspinatus separated from the scapula?
The infraspinatus muscle fibers course towards the shoulder joint almost parallel to the teres minor and major, separated from them by a thick fascia. As it approaches the shoulder joint, the infraspinatus is sometimes separated from the neck of the scapula by the infraspinatus bursa, which may communicate with the shoulder joint cavity.
Is the scapula a bone or a plate?
Anatomical terms of bone. [edit on Wikidata] The spine of the scapula or scapular spine is a prominent plate of bone, which crosses obliquely the medial four-fifths of the scapula at its upper part, and separates the supra- from the infraspinatous fossa.
How does scapular winging affect the upper extremity?
Scapular winging is a rare debilitating condition that leads to limited functional activity of the upper extremity. It is the result of numerous causes, including traumatic, iatrogenic, and idiopathic processes that most often result in nerve injury and paralysis of either the serratus anterior, trapezius, or rhomboid muscles.
