2. levator scapulae, rhomboideus minor and romboideus major. Costal aspect of the scapula with attachments of muscles mapped out. Scapula 3D models ready to view, buy, and download for free. Insertion: (distal attachments) a. Medial border of the scapula between spine and superior angle. How To Protect Your Eyes From Electronics Devices? The coracohumeral ligament is connected to the root of the coracoids process of the scapula. Scapulothoracic Bursa, within the serratus and the thorax, moreover This part of the bone is almost rod-like: It acts as a lever for the action of the serratus anterior in overhead abduction of the arm. 4. Back Muscles: The muscles of the back that work together to support the spine, help keep the body upright and allow twist and bend in many directions. The coracoid process is an anteriorly projecting hook-like process on the superolateral edge of the scapula that projects anterolaterally. Copyright © 2016 - 2019 How To Relief. The posterior surface of the scapula faces outwards. The subscapularis muscle (a multipennate muscle) arises from the medial two-third of subscapular fossa/ costal surface with the exception of near the neck where a subscapular bursa intervenes in between the neck and the subscapular tendon. Another muscle, the Pectoralis minor, comes from the anterior chest wall, to be inserted into the coracoid process of the scapula. This shows how the scapula is of an important role in the muscular function of the arm, as the muscles attached to the humerus connecting it to the scapula are capable of rotating, extending, abduction the arm as well as bringing about other types of movements. Additionally, this muscle is also a weak flexor of the arm at the shoulder joint. Spine – This most prominent feature of the posterior scapula. Shmear that Hoovercraft. The scapula is the large triangular bone connecting the humerus, or upper arm bone, to the clavicle, or collar bone. The scapula also articulates with the humerus of the upper arm to form the shoulder joint, or glenohumeral joint, at the glenoid cavity. The long head of the Biceps originates from a point just a bit farther away from the point of attachment of its short head. A scapula’s posterior surface is crossed obliquely by a prominent ridge, the spine, which The Trapezius is inserted into the spine of the scapula, wheras the other 3 are inserted into its medial border, which helps them achieve their function the best. Scapula has various bony projections for attachment of muscles, ligaments and other soft-tissue structures.These include the scapular spine, acromion process, coracoid process, scapular notch, lateral scapular spine, and glenoid fossa. 17 muscles attach to the scapula (in alphabetic order): 1. biceps brachii(both heads) 2. coracobrachialis 3. deltoid 4. infraspinatus 5. latissimus dorsi 6. levator scapulae 7. omohyoid inferior belly 8. pectoralis minor 9. rhomboid major 10. rhomboid minor 11. serratus anterior 12. subscapularis 13. supraspinatus 14. teres major 15. teres minor 16. trapezius 17. triceps brachii(long head) Side determination of scapula || Attachment of scapula || scapula … In fish, the scapular blade is a structure attached to the upper surface of the articulation of the pectoral fin, and is accompanied by a similar coracoid plate on the lower surface. An abnormally projecting inferior angle of the scapula is identified as a winged scapula and can be produced by paralysis of the serratus anterior muscle. The levator scapulae, rhomboideus major and minor muscles comprise of double folds at the scapular end. The authors described in this report the mode of attachments of muscles along the medial border of the scapula, as seen in sixty adult Indians. Also share? The scapula is a flat, triangular bone located posterior to the ribcage. The Teres major, Teres minor and the long head of the Triceps brachii are attached to the lateral border of the scapula. The other 10 muscles are all inserted into the humerus. Serratus anterior is inserted along the medial border of the costal surface; 1 digitation from the superior angle to the root of the spine, 2 digitations to the medial border, 5 digitations to the inferior angle of the scapula. There is a total of 17 muscles connected to the scapula, 11 of which originate from it, whereas 6 others have it as a point of insertion. The superolateral surface of the costal scapula is the coracoid process. The subcoracoid center develops in the root of the coracoid process throughout the 10th year and fuses by the 16th to 18th years of age. Glenoid fossa –  A shallow cavity, which connects with the humerus to settle the glenohumeral joint. The scapula has two surfaces, three borders, three angles, andthree processes. The margin of the glenoid cavity of the scapula gives adjunct to the capsule of the shoulder joint and to the glenoid labrum. The Teres major, Teres minor and the long head of the Triceps brachii are attached to the lateral border of the scapula. The suprascapular vessels and nerve passageway to it. The coracoacromial ligament is connected to the lateral border of the coracoids process and to the medial side of the tip of the acromion process of the scapula. Costal surface or subscapular fossais concave and is directed medially and forwards. It is a triangular, flat bone, which attachment for 17 muscles. It is the position of the glenohumeral joint, and of numerous muscle attachments. The three borders are: Medial, Lateral and Superior borders. Scapula: The scapula is also known as the shoulder blade. Muscles attached to the three borders of scapula Medial border – Costal surface (including that of inferior angle) provides attachment( insertion) to serratus anterior . The subscapularis muscle originates from this side. The pectoralis minor attaches here, while the coracobrachialis and biceps brachii muscles originate from this projection. In this situation, the sides of the scapula nearest the spine are located outward and backward. Another thick ridge adjoins the lateral border. Because of its protected location, fractures of the scapula are uncommon. The glenoid labrum is a fibrocartilaginous rim attached around the margin of the glenoid cavity of the scapula. The scapula, also called the shouder blade , is either of two large, roughly triangular flat bones found on either side of the upper back, and forming part of the pectoral ( shoulder ) girdle of humans and other vertebrates. Fibers from the Latissimus dorsi, a muscle that originates from the iliac crest and extends along the length of the vertebral column, ascending to the 7th thoracic vertebra, are attached to the inferior angle of the scapula. anatomy of scapula, borders, surfaces, processes, side determination, muscle attachments, ligament attachments Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. In order to do so, muscles originate from and are inserted into the scapula, connecting it to the humerus of the arm, the vertebral column of the axial skeleton and to other bones of the body, which helps the bone achieve its optimum function, in accordance with the structure it’s connected to. All rights reserved. The suprascapular nerve travels through the notch and provides motor supply to the supraspinatus muscle and infraspinatus muscle, as well as sensation to the acromioclavicular joint. The spine grows taller and thicker as it moves laterally and superiorly toward the shoulder joint. Deltoid arises from the lower border of the crest of the spine and from lateral border acromion. Dorsal surfacegives attachment to the spine of the scapula which divides the surface into a smaller supraspino… The 1st secondary center develops in the middle of the coracoid process of the scapula throughout the first year and fuses by the 15th year of age. 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