Correctly label the anatomical features of the scapula. 31 0.14 points Acromion Subscapular fossa eBook Superior border It is closest to the vertebrae. Print Coracold process References Suprascapular notch Glenoid cavity Medial border Lateral border
The Correct Answer and Explanation is :
The scapula, commonly known as the shoulder blade, is a flat, triangular bone located on the posterior side of the thorax. It serves as a vital component of the shoulder girdle, facilitating the attachment of muscles and the articulation of the upper limb. Below is an overview of the key anatomical features of the scapula:
1. Acromion:
The acromion is a bony prominence on the superior aspect of the scapula. It extends laterally over the shoulder joint and articulates with the clavicle, forming the acromioclavicular joint. This structure provides attachment points for muscles such as the deltoid and trapezius.
2. Subscapular Fossa:
Located on the anterior (costal) surface of the scapula, the subscapular fossa is a shallow depression that serves as the origin for the subscapularis muscle, a major muscle involved in shoulder movement.
3. Superior Border:
The superior border is the upper edge of the scapula, extending from the medial to the lateral border. It is closest to the vertebrae and provides attachment for muscles such as the levator scapulae.
4. Coracoid Process:
The coracoid process is a hook-like bony projection on the anterior surface of the scapula. It serves as an attachment point for several muscles, including the coracobrachialis, pectoralis minor, and the short head of the biceps brachii.
5. Suprascapular Notch:
Located immediately medial to the base of the coracoid process, the suprascapular notch is a groove that allows passage for the suprascapular nerve and artery.
6. Glenoid Cavity:
The glenoid cavity, or glenoid fossa, is a shallow, pear-shaped depression on the lateral aspect of the scapula. It articulates with the head of the humerus to form the glenohumeral joint, enabling a wide range of shoulder movements.
7. Medial Border:
The medial border, also known as the vertebral border, is the edge of the scapula closest to the vertebral column. It provides attachment for muscles such as the rhomboid major and minor, as well as the levator scapulae.
8. Lateral Border:
The lateral border, or axillary border, is the edge of the scapula closest to the axilla (armpit). It provides attachment for muscles such as the teres minor and teres major.
Understanding these anatomical features is essential for comprehending the scapula’s role in shoulder mechanics and its involvement in various upper limb movements.