Today i have decided to post about my one of my most favorite muscle. This muscle has been my favorite ever since i took my first anatomy class in high school, and it has stuck with me all these years. That muscle is the deltoid. The deltoid muscle covers the upper part of the shoulder joint and attaches on to the middle of the upper arm bone or the humerus. It's a big muscle and does many functions, so many that it is actually classified into 3 sections, anterior, middle, and posterior.
The delts are the heavy lifter of the shoulder, it is responsible for most of the abduction of the shoulder and helps to prevent dislocation of the shoulder when we carry heavy loads. Like when i carry my groceries to the house from the car in only one trip, and also helps hold those grocery bags away from the body enough so they don't hit my thighs when i walk.
The anterior fibers of the delts are responsible for moving the arm upwards and to the front of the body, also, they medially rotate the arm.
The middle fibers abduct the arm, meaning they move the arm out to the side, like you are forming an T with your body.
And lastly, the posterior fibers extend the shoulder, moving the arm down and behind you and also, outward rotation of the arm.
Without the deltoid muscles our shoulders would be in big trouble, that's why it's so important to keep your delts functioning correctly in conjunction with the smaller muscles of the shoulder.
No comments:
Post a Comment