Clavicle bone anatomy

The clavicle (collarbone) is a part of the skeletal system that connects the arm to the body. Ligaments connect this long, thin bone to the sternum and shoulder. The clavicle is prone to injuries, such as clavicle fracture, dislocated shoulder and separated shoulder. Falls are a top cause of collarbone injuries. What is the clavicle (collarbone)? Your clavicle (collarbone) is a long, thin, slightly curved bone that connects your arm to your body. It sits below your neck and is part of the front of your shoulder. It runs horizontally (from side to side). This bone connects your sternum in the middle of your ribcage to your shoulder blade (scapula). What are the parts of the collarbone? The collarbone is part of the There are two collarbones. One attaches to the left shoulder blade and the other to the right shoulder blade. Ligaments (strong bands of tissue) connect the collarbone to the shoulder blades and sternum or breastbone. What conditions and disorders affect the collarbone? The collarbone is a thin bone. It lies right underneath the surface of the skin, making it prone to fractures and injuries. Types of collarbone injuries include: • Clavicle fracture or broken collarbone may break in one place or several places (comminuted fracture). A displaced collarbone fracture happens when the ends of the broken bones don’t line up. • Dislocated shoulder occurs when the upper arm bone (humerus) pops out of the shoulder blade socket. A partial dislocation means part of the hume...

The larger medial curvature allows more space for passage of neurovascular structures from the neck into the upper extremity through the costoclavicular interval. The transition from medial to lateral curvature occurs at approximately two-thirds the length of the bone as measured from its sternal end, a site that roughly corresponds to both the medial limit of attachment of the coracoclavicular ligaments and the entrance point of the main nutrient artery of the clavicle. Males have significantly greater medial curvatures than females, most likely due to their greater size. Similarly, left-sided clavicles tend to be longer and have a greater medial curvature. On the other hand, it appears that the lateral curvature of the clavicle is not affected by either gender or anatomical side. Longer clavicles do not necessarily confer larger lateral curvatures (Table The curvature of the IM canal represents the curvature an IM device should be shaped to in order to fit inside properly [ The clavicle is made up of dense trabecular bone lacking a well-defined medullary canal. In cross-section, the clavicle changes gradually between an expanded prismatic medial end, a tubular midportion, and a flat lateral aspect. In addition to the variation in cross-sectional shape, the diameter of the clavicle and IM canal experience significant change in size. A recent clavicle morphometry study has found that the medial and lateral ends of the bone are the widest regions with an average diameter of...

• 1 Bony Landmarks and Articulations • 1.1 Sternal (medial) End • 1.2 Shaft • 1.3 Acromial (lateral) End • 2 Clinical Relevance: Fracture of the Clavicle The clavicle (collarbone) extends between the manubrium of the sternum and the acromion of the scapula. It is classed as a long bone and can be palpated along its length. In thin individuals, it is visible under the skin. The clavicle has three main functions: • Attaches the upper limb to the trunk as part of the ‘shoulder girdle’. • Protects the underlying neurovascular structures supplying the upper limb. • Transmits force from the upper limb to the axial skeleton. In this article, we shall look at the anatomy of the clavicle – its bony landmarks and clinical correlations. Bony Landmarks and Articulations The clavicle is a slender bone with an ‘S’ shape. Facing forward, the medial aspect is convex, and the lateral aspect concave. It can be divided into a sternal end, a shaft and an acromial end. Sternal (medial) End The sternal end contains a large facet – for articulation with the manubrium of the sternum at the The inferior surface of the sternal end is marked by a rough oval depression for the costoclavicular ligament (a ligament of the SC joint). Shaft The shaft of the clavicle acts a point of origin and attachment for several muscles – deltoid, trapezius, subclavius, pectoralis major, sternocleidomastoid and sternohyoid Acromial (lateral) End The acromial end houses a small facet for articulation with the acromion ...

Upper extremity (anterior view) It consists of four major segments, which are further subdivided into regions for precise description: • Shoulder • Arm • • In this page, we are going to study shoulder and arm Key facts about the anatomy of the shoulder and arm Bones Clavicle, scapula, humerus Muscles Superficial: deltoid, trapezius Rotator cuff muscles: supraspinatus, infraspinatus, teres minor, subscapularis Arm: brachialis, biceps brachii, triceps brachii, coracobrachialis Others: teres major, serratus anterior, levator scapulae, rhomboid major, rhomboid minor, pectoralis major, pectoralis minor, latissimus dorsi, brachialis, biceps brachii, triceps brachii Nerves Suprascapular and axillary nerves, which originate from the brachial plexus. Arteries Axillary and brachial arteries Veins Brachial, basilic and cephalic veins Glenohumeral (shoulder) joint Explore study unit Bones The shoulder is the region where the upper limb is attached to the trunk. • the clavicle • the scapula • the humerus Test your knowledge of the clavicle, scapula and humerus with our labeled diagram exercises and quizzes! The humerus is the bone of the arm that articulates with the scapula proximally and with the radius and the ulna distally. Immerse yourself with the following learning materials to learn everything about the bones of the arm. Another group of muscles that is quite important for this region is the Remember the rotator cuff muscles easily using the following mnemonic! Rotator cuff SIT...

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Video Description FOLLOW ON INSTAGRAM :- Channel Memberships : The clavicle is an elongated, S-shaped bone that rests horizontally at the sternum across the upper part of the ribcage, and the acromial end of the scapula. This bone plays an essential role in everyday functional movement, serving as the connection between the axial skeleton and the pectoral girdle. As a result, the clavicle is able to act as a brace for the shoulder, allowing weight to be transferred from the upper limbs to the axial skeleton. Articulations Due to the clavicle’s structure, there are only two planar diarthrosis articulations that can be found. This type of articulation is also known as a ‘double plane joint’ – where two joint cavities are separated by a layer of articular cartilage. Acromioclavicular Joint The first is the acromioclavicular joint, which is formed by the acromial end of the clavicle and the acromion of the scapula respectively. It enables slight gliding movement about the shoulder region. The synovial joint is surrounded by a capsule of articular cartilage filled with intra-articular synovium. From infancy, the articular cartilage starts off as hyaline cartilage, but soon develops into fibrocartilage (at the scapula acromion and the clavicle acromial end at ages 17 and 24, respectively).The acromioclavicular ligament forms a strong connection between the clavicle and the scapula acromion, which restricts movement about the clavicle at its acromial end. Bony Landmarks Extremiti...