The human clavicle, also known as the collarbone, is a long, slender bone located in the upper part of the chest, connecting the sternum to the scapula. The clavicle is a crucial part of the body’s skeletal system, providing support for the shoulders, arms, and upper body. In this article, we will explore the anatomy, function, muscles, and common injuries of the clavicle.
Anatomy of the Clavicle
Knowing a little about the anatomy of the clavicle helps to Learn how to draw it. The clavicle is a S-shaped bone that sits horizontally in the body, spanning from the sternum to the acromion process of the scapula. The clavicle has two ends and two borders. The sternal end is rounded and articulates with the manubrium of the sternum, while the acromial end is flattened and articulates with the acromion of the scapula. The medial border is concave and the lateral border is convex. In the middle of the bone, there is a slight depression known as the clavicular notch, which serves as an attachment site for the sternocleidomastoid muscle.
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Function of the Clavicle
The clavicle has several important functions in the body. Perhaps the most important function is to provide support for the shoulders and arms. The clavicle helps to keep the shoulders and arms in place, allowing for a wide range of motion in the upper body. The clavicle also helps to distribute the weight of the upper body evenly across the shoulders and chest, which helps to prevent injury and strain.
The clavicle also plays an important role in breathing. The clavicle helps to hold the sternum in place, which is important for maintaining proper breathing mechanics. The clavicle also helps to protect the major blood vessels and nerves that run through the chest and shoulders, which are essential for the proper functioning of the heart, lungs, and other vital organs.
Muscles Attached to the Clavicle
The clavicle is connected to several muscles in the body, which help to provide support and stability for the shoulders and upper body. Some of the most important muscles attached to the clavicle include:
- Sternocleidomastoid: This muscle runs from the sternum to the base of the skull and helps to turn the head and flex the neck. The sternocleidomastoid muscle attaches to the clavicular notch of the clavicle.
- Pectoralis major: This muscle runs from the breastbone to the upper arm and helps to move the arm forward and across the chest. The pectoralis major muscle attaches to the clavicle near the sternal end.
- Deltoid: This muscle runs from the collarbone to the upper arm and helps to lift the arm. The deltoid muscle attaches to the clavicle near the acromial end.
- Trapezius: This muscle runs from the base of the skull to the middle of the back and helps to move the shoulders and arms. The trapezius muscle attaches to the clavicle near the acromial end.