Label the bony structures of the shoulder and upper limb. Subscapular fossa Suprascapular notch Scapula Clavicle Anatomical neck Lesser tubercle Coracoid process Pectoral girdle Intertubercular sulcus
The Correct Answer and Explanation is :
iturn0image0turn0image2turn0image4turn0image9The shoulder and upper limb comprise several key bony structures that facilitate movement and provide support. Here’s an overview of the specified structures:
1. Subscapular Fossa: Located on the anterior (front) surface of the scapula, the subscapular fossa is a broad concave area that serves as the origin for the subscapularis muscle, a component of the rotator cuff. citeturn0search19
2. Suprascapular Notch: Situated along the superior (upper) border of the scapula, medial to the coracoid process, the suprascapular notch is a small indentation that allows passage for the suprascapular nerve and vessels. citeturn0search15
3. Scapula: Commonly known as the shoulder blade, the scapula is a flat, triangular bone located on the posterior (back) side of the rib cage. It provides attachment points for several muscles and articulates with the clavicle and humerus. citeturn0search19
4. Clavicle: Also called the collarbone, the clavicle is a slender, S-shaped bone that connects the arm to the body. It articulates medially with the sternum and laterally with the acromion of the scapula, forming the pectoral girdle. citeturn0search14
5. Anatomical Neck: Located just below the head of the humerus, the anatomical neck is a slight constriction that marks the boundary between the head and the shaft of the bone. citeturn0search16
6. Lesser Tubercle: Found on the anterior surface of the proximal humerus, the lesser tubercle serves as the attachment site for the subscapularis muscle. citeturn0search16
7. Coracoid Process: This hook-like bony projection is located on the anterior surface of the scapula, just below the lateral end of the clavicle. It serves as an attachment point for several muscles and ligaments, including the pectoralis minor and the short head of the biceps brachii. citeturn0search20
8. Pectoral Girdle: Also known as the shoulder girdle, the pectoral girdle consists of the clavicle and scapula. It connects the upper limb to the axial skeleton and provides attachment points for muscles that move the shoulder and arm. citeturn0search6
9. Intertubercular Sulcus (Bicipital Groove): This groove is located between the greater and lesser tubercles of the humerus. It houses the tendon of the long head of the biceps brachii muscle. citeturn0search16
Understanding these structures is essential for comprehending the anatomy of the shoulder and upper limb, as they play crucial roles in movement and stability.
For a visual representation and further details, you might find the following video helpful:
videoAnatomy of the Upper Limb: Osteology of the Shoulderturn0search18