Shoulder pain is common in athletes and the general population. Healthline Media does not provide medical advice, diagnosis, or treatment. To make your student life even easier, we’ve created these muscle anatomy reference charts for you. Each head of the deltoid has slightly different insertion points, allowing for more control and a full range of motion at the shoulder joint. It originates at the rib cartilages 3-5 and inserts to the medial border and the coracoid process of the scapula. Many are there to supply the lower half of the body but many supply the male reproductive…, The ductus deferens, or the vas deferens, is a male anatomical part; there are two of these ducts and their purpose is to carry ejaculatory sperm out…, The spermatic cord is actually a bundle of fibers and tissues that form a cord-like structure that runs through the abdominal region down to the…, Humans are sexual, meaning that both a male and a female are needed to reproduce. The shoulder joint, also known as the glenohumeral joint, is a ball and socket joint with the most extensive range of motion in the human body. Also, it draws the scapula anteroinferiorly. The sternocostal head originates from the anterior surface of the sternum and rib cartilages 1-6, while its abdominal head originates from the anterior layer of the rectus sheath. What are the muscles that abduct the shoulder? Latissimus dorsi is another large muscle at the posterior shoulder area. Extrinsic muscles are further subdivided into superficial and deep layers. The most common cause of shoulder pain is overexertion of a muscle or injury to it. Except of the trapezius, which is innervated by the spinal accessory nerve (CN XI) and the cervical plexus, all the other posterior shoulder muscles are innervated by branches of the brachial plexus. All rights reserved. Shoulder Muscles: The shoulder muscles are associated with movements of the upper limb. This then triggers the remainder of the glenohumeral joint to assist with stabilizing the s… The main shoulder muscles are trapezius, deltoid, pectoralis major and 4 rotator cuff muscles: subscapularis, supraspinatus, infraspinatus and teres minor. To learn more about how the shoulder muscles work, review the accompanying lesson called Shoulder Muscles: Anatomy, Support & Movement. Don't feel overwhelmed with these muscle facts, as we’ll explain them the simplest way possible. Anterior shoulder muscles, also called the pectoral muscles, attach the upper extremity to the clavicle and the thoracic cage. Imagine our super dads reaching up with their arms stretched out above their heads, like Super Man, and tickling a … Its functions are to depress and hold the clavicle in position. “I would honestly say that Kenhub cut my study time in half.” The most important shoulder muscles are the four rotator cuff muscles - the subscapularis, supraspinatus, infraspinatus and teres minor muscles - which connect the scapula to the humerus and provide support for the glenohumeral joint. The intrinsic muscles of the posterior group include the deltoid, teres major and the muscles of the rotator cuff. It is supplied by the anterior rami of spinal nerves and dorsal scapular nerve. Find out in this Anatomy of the Shoulder Quiz. Different fibers of the muscle are responsible for different actions, including raising the arm and assisting the pectoralis muscle in the chest. Repetitive use injuries primarily affect the deep muscles; however, pain and soreness as a result of pulled muscles from heavy lifting or overexertion usually subsides in a few days. These muscles produce a large spectrum of arm movements which include internal and external arm rotation, arm abduction and arm adduction. Clinical Examination A comprehensive collection of clinical examination OSCE guides that include step-by-step images of key steps, video demonstrations and PDF mark schemes. and grab your free ultimate anatomy study guide! Register now The right scapula from the front and back side. Its insertion is on the medial border of the scapula, expanding from the superior angle to the root of spine of scapula. Same as in serratus anterior, the parts have different origins and insertions. The shoulder anatomy includes the anterior deltoid, lateral deltoid, posterior deltoid, as well as the 4 rotator cuff muscles. Lung anatomy 10p Image Quiz. The anterior head of the deltoid works closely with pectoralis major, which allows for full stabilization near its more superior insertion on the clavicle. Insertion – Greater tuberosity on the humerus; Actions – Shoulder horizontal abduction. The long thoracic nerve supplies the serratus anterior. Muscles of the shoulder and their functions. The proximal humerus is the point of attachment for many of ligaments and muscles of the shoulder complex. Shoulder muscles (anterior view) - Yousun Koh, Posterior shoulder muscles and back muscles (diagram) - Yousun Koh. What can you tell us about how these joints work? The levator scapulae originates from the transverse processes of the vertebrae C1-C4. 202 11 games. It inserts at the anteroinferior surface of the middle part of the clavicle. Shoulder muscles: want to learn more about it? For that reason, and because of the dexterity of the shoulder joint itself, the musculature of the shoulder is complex, ranging from massive prime mover muscles to finer stabilizer and fixator muscles. It originates in three portions, the anterior, middle and posterior portions. All rights reserved. The pectoralis major muscle is innervated by the lateral and medial pectoral nerves. Learning anatomy is a massive undertaking, and we're here to help you pass with flying colours. Picture 2. Its clavicular head originates from the anterior surface of the medial half of the clavicle. It has three parts; descending, transverse and ascending. 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 The clavicular part originates from the lateral third of clavicle, the acromial part from the acromion of the scapula and the spinal part from the spine of the scapula. A combination of muscles and tendons keeps your arm bone centered in your shoulder socket. Learn about these muscles, their origin and insertion points, and their functional anatomy. The shoulder complex is made up of three bones, which are connected by muscles, ligaments, and tendons. Scapula Anatomy. Start Now. The Anatomy of the Shoulder The shoulder is made up of two joints, the acromioclavicular joint and the glenohumeral joint. The shoulder is one of the most sophisticated and complicated joints of the body: It has the greatest range of motion of any joint in the body with complete global movement allowing you to position the hand anywhere in space. When each of the deltoid's three heads contracts together, it allows the arm to be elevated, or abducted, the first 15 degrees away from the body. The muscles of the shoulder are associated with movements of the upper limb. This socket is called the glenoid. 203 revision 3 games. Other muscles that aid in shoulder movement include: Four muscles—the supraspinatus, infraspinatus, teres minor, and subscapularis—make up the rotator cuff. Gray's Anatomy for Students (3rd ed.). Last medically reviewed on January 23, 2018, The corpus spongiosum is yet another part of the male anatomy that facilitates sexual reproduction. Read more. This section is a review of basic shoulder anatomy. Because these muscles are used in a wide range of motion and are responsible for bearing heavy loads, shoulder muscle pain is a common ailment. Learn anatomy faster and remember everything you learn. The shoulder joint (glenohumeral joint) is a ball and socket joint with the most extensive range of motion in the human body. Acting together, the rotator cuff muscles stabilize the shoulder joint. This freedom of movement makes the shoulder vulnerable to injury and pain. Lower limb games 7 games. It then stretches downward to near the center of the humerus bone. By inserting into the crest of greater tubercle of the humerus, it enables adduction and internal rotation of the arm. © 2005-2021 Healthline Media a Red Ventures Company. The pectoralis minor lies underneath the pectoralis major muscle. Philadelphia, PA: Lippincott Williams & Wilkins. The muscles of the shoulder support and produce the movements of the shoulder girdle. Introduction to the musculoskeletal system, Anterior axio-appendicular shoulder muscles, Posterior axio-appendicular shoulder muscles, adduction and internal rotation of the arm. The shoulder muscles consist of the Deltoids and the Rotator Cuff Group.The Deltoids are the muscles that can be seen on the outside of the body, whilst the Rotator Cuff Group is found within the shoulder joint itself, providing structural support and allowing the shoulder to perform many functions. The muscles in the shoulder aid in a wide range of movement and help protect and maintain the main shoulder joint, known as the glenohumeral joint. The teres major originates from the inferior angle and the lower part of the lateral border of the scapula, while it inserts to the medial lip of intertubercular sulcus. The shoulder has about eight muscles that attach to the scapula, humerus, and clavicle. It stabilizes the shoulder and holds the head of the humerus into the glenoid cavity to maintain the principal shoulder joint. Extensor muscles of the forarm 13p Image Quiz. Grounded on academic literature and research, validated by experts, and trusted by more than 1 million users. Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). SIDE (LATERAL) MUSCLES OF THE SHOULDER The large deltoid muscle provides the characteristic contour of the shoulder and is the largest, strongest muscle of the shoulder. This, to me, is the best way to show you how much your horse moves as a unit. They produce the characteristic shape of the shoulder, and can be divided into two groups: TeachMe The shoulder has several other important structures: The rotator cuff is a collection of muscles and tendons that surround the shoulder, giving it support and allowing a wide range of motion. The transverse part draws scapula medially, while the ascending parts draws it inferomedially. The trapezius muscle is a large muscle that defines the nuchal region. – At the shoulder, the humerus connects to the axial body via the glenoid fossa of the scapula. Responsible for the movement of our ever-important hands, the shoulder is an extremely important part of the body when it comes to getting done what it is we want to get done. These muscles include the pectoralis major, pectoralis minor, subclavius and the serratus anterior muscle. They all insert to the deltoid tuberosity. The human shoulder is made up of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone) as well as associated muscles, ligaments and tendons. The axillary nerve supplies the muscle. The serratus anterior muscle is divided into three parts which differ in origins and insertions; superior, middle and inferior. Memorize the following mnemonic to simplify your learning about the origins of the deltiod muscle. The functions of the levator scapulae include the lateral flexion of the neck (ipsilateral), drawing the scapula superomedially and rotation of the glenoid cavity inferiorly. The ball-and-socket joint of the shoulder might be the most mobile, but that comes with a cost: lack of stability. • 2021 At the elbow, it connects primarily to the ulna, as the forearm's radial bone connects to the wrist. The descending part draws scapula superomedially, extends and laterally flexes the Playlists by same creator. from anatomy nerds; Trusted by 1,000,000+ ... Muscles That Act On The Anterior Shoulder. This large triangular muscle covers the glenohumeral joint and gives the shoulder its rounded-off shape. Its functions are to draw scapula anterolaterally, to suspend scapula on thoracic wall and to rotate scapula (draws inferior angle laterally). It has three heads; clavicular, sternocostal and abdominal. Search Help in Finding Muscles of the shoulder joint - Online Quiz Version. It covers the bones, ligaments, muscles and other structures that make up the shoulder. They produce the characteristic shape of the shoulder, and can be divided into two groups: Extrinsic – originate from the torso, and attach to the bones of the shoulder (clavicle, scapula or humerus). The central … The rhomboid major originates from the spinous processes of T2-T5 vertebrae and inserts to the medial border of the scapula from inferior angle to root of spine of scapula. Shoulder muscles move the shoulder blades and upper arm bones. It stretches across the top of the shoulder from the clavicle in the front to the scapula in the back. The glenohumeral joint is where the ball (humeral head) and the socket (the glenoid) meet. The pectoralis major muscle covers the anterior thoracic cage. The functions of the deltoid muscle are related to the shoulder joint and include the arm flexion, arm internal rotation (clavicular part), arm abduction (acromial part), arm extension and arm lateral rotation (spinal part). Jan 6, 2019 - Explore chaya klein's board "Shoulder muscles" on Pinterest. Shoulder Anatomy. These muscles form the outer shape of the shoulder and underarm. The largest of these shoulder muscles is the deltoid. Anterior axio-appendicular muscles (thoraco-appendicular muscles), Posterior axio-appendicular muscles (scapulo-humeral muscles). Copyright © Your shoulder is made up of three bones: your upper arm bone (humerus), your shoulder blade (scapula), and your collarbone (clavicle). It is a soft, spongy tissue that surrounds the…, The fimbriae of the uterine tube, also known as fimbriae tubae, are small, fingerlike projections at the end of the fallopian tubes, through which…, There are many blood vessels within the male pelvic region. Last reviewed: October 29, 2020 As you will see, there’s muscles that attach on the shoulder and the head, on the shoulder and neck, on the shoulder and withers, on the shoulder and pelvis and so on. Explore this shoulder anatomy starter pack, which includes various video tutorials, quizzes, labeled diagrams, and articles. Minor shoulder muscle pain can usually be healed with a combination of rest, ice, elevation, and compression of the impacted region. The shoulder abduction muscles are Supraspinatus, Deltoid, Trapezius, and Serratus Anterior.A mnemonic memory aid to remember these four muscles responsible for aBducting the shoulder is: Super Dads Tickle Super Alpacas. See more ideas about massage therapy, muscle anatomy, hip flexor. Read more. The list of muscles and their functions are presented below. The dorsal scapular nerve innervates both muscles, and they both share functions of drawing scapula superomedially, rotating the glenoid cavity inferiorly and supporting the position of scapula. Muscles of the shoulder are a group of muscles surrounding the shoulder joint, which move and provide support to the said joint. The muscles of the shoulder have a wide range of functions, including abduction, adduction, flexion, extension, internal and external rotation. These muscles form the outer shape of the shoulder and underarm. They attach the appendicular skeleton of the upper limb to the axial skeleton of the trunk. The large bone in the upper arm is called the humerus. The lower subscapular or thoracodorsal nerves supplies it. The former contains the trapezius and latissimus dorsi muscle, while the latter houses the levator scapulae and rhomboid muscles. The functions of the teres major are the arm adduction and arm internal rotation. They are the vertebral, iliac, costal and scapular. The shoulder muscles bridge the transitions from the torso into the head/neck area and into the upper extremities of the arms and hands. You can easily remember them with the following mnemonic! The muscles of the shoulder are associated with movements at the shoulder joint. Dimitrios Mytilinaios MD, PhD Kenhub. The acromioclavicular joint is where the acromion, part of the shoulder blade (scapula) and the collar bone (clavicle) meet. Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster. The head of your upper arm bone fits into a rounded socket in your shoulder blade. Muscles Anterior axio-appendicular muscles : Pectoralis major, pectoralis minor, subclavius and serratus anterior The subclavius muscle originates at the cartilage and the sternal end of the 1st rib. They are innervated by the suprascapular (supraspinatus and infraspinatus), axillary (teres minor) and upper and lower subscapular nerves (subscapularis). The rhomboid minor muscle originates from the nuchal ligament and the spinous processes of the vertebrae C7-T1 and inserts to the root of the spine of scapula. Clinically Oriented Anatomy (7th ed.). Check out our video tutorial to learn more about these muscles, and then quiz yourself to see if it sticks. Reviewer: Jana Vasković Reading time: 10 minutes. The nerve to the subclavius supplies this muscle. Kim Bengochea, Regis University, Denver, Author: It is the main external rotator of the shoulder joint. Twisting, pulling, or falling are common ways muscles in the shoulders become painful. The rotator cuff is a group of four muscles (supraspinatus, infraspinatus, teres minor, subscapularis) that enclose the glenohumeral joint by forming the cuff around it. Origin – Posterior surface of the scapula (below the spine of the scapula). Based on their location, the shoulder muscles are grouped into: This page will introduce you to the anatomy and function of the shoulder muscles. Our website services, content, and products are for informational purposes only. About eight shoulder muscles attach to the shoulder blade (scapula), upper arm (humerus), and collar bone (clavicle). The deltoid muscle has three parts; the clavicular, acromial and spinal part. You already assume that this one also has some parts, and you’re correct; there are four parts of this muscle. Muscles That Act On The Anterior Shoulder. The following is an overview of the shoulder muscle anatomy. The posterior axio-appendicular muscles are divided into two groups; extrinsic and intrinsic. It is approximately the size of a small…, The pelvic region holds major organs under its layers of muscles. The muscle is innervated by the thoracodorsal nerve. The first line of defense for stabilizing the shoulder is the muscles that make up the rotator cuff: the supraspinatus, infraspinatus, subscapularis and teres minor muscles. Its functions are the adduction, internal rotation and extension of the arm, while it also assists in the respiration. The muscle is innervated by the branches of the spinal accessory nerve (CN XI) and the anterior rami of spinal nerves C3-C4 via the cervical plexus. Drake, R. L., Vogl, A. W., & Mitchell, A. W. M. (2015). The trapezius functions are also part-specific. The Infraspinatus muscle is one of the four rotator cuff muscles crossing the shoulder joint and is commonly injured. Plus, exercises for training them. Some of the most important include the major digestive organs, the intestines. Four of them are found on the anterior aspect of the shoulder, whereas the rest are located on the shoulder’s posterior aspect and in the back. Each is equipped with specific organs capable of producing specific…, The prostatic plexus is a relatively large bundle of nerves that arises from the inferior (lower) portion of the pelvic plexus, a bundle of nerves…, The prostate gland is situated at the origin of the urethra, the tube that carries urine out of the body. The shoulder muscles produce the characteristic shape of the shoulder and can be classified into two groups: Extrinsic shoulder muscles – arise from the torso, and … An overview of shoulder joint anatomy including the bones of the shoulder joint, the ligaments of the shoulder and the muscles of the shoulder girdle. There are two rhomboid muscles; rhomboid minor and rhomboid major. They all belong anatomically to the extrinsic and intermediate muscles of the back. Philadelphia, PA: Churchill Livingstone. The pectoralis minor draws the scapula anteroinferiorly and anchors it to the thoracic cage. The medial pectoral nerve supplies the muscle. All of them are supplied by the respective branches of the brachial plexus. One important function of the deltoid is preventing joint dislocation when a person carries heavy objects. head and neck and rotates the head. The…. The shoulder is a complex joint with many muscles that control the shoulder’s wide range of motion. The anterior portion arises from the anterior border and superior surface of the clavicle. Muscles of the shoulder are a group of muscles surrounding the shoulder joint, which move and provide support to the said joint. The shoulder has about eight muscles that attach to the scapula, humerus, and clavicle. Raising the arm and assisting the pectoralis major muscle covers the anterior thoracic.... 'S board `` shoulder muscles, ligaments, muscles and other structures make. Group of muscles ways muscles in the back heads ; clavicular, sternocostal and.! With these muscle facts, as the forearm 's radial bone connects to the musculoskeletal,. Joint, which includes various video tutorials, quizzes, in-depth articles HD! Show you how much your horse moves as a unit Yousun Koh, Posterior area. Descending part draws scapula superomedially, extends and laterally flexes the head of the male anatomy that facilitates sexual.!, labeled diagrams, and tendons muscles ; rhomboid minor and rhomboid muscles ; minor! S wide range of motion major digestive organs, the anterior portion arises from the transverse part draws scapula,. Parts have different origins and insertions ; superior, middle and inferior muscle facts, as the forearm 's bone. You already assume that this one also has some parts, and by! Million users part draws scapula superomedially, extends and laterally flexes the head of your arm... Humerus bone the forearm 's radial bone connects to the thoracic cage A. M. (. ( diagram ) - Yousun Koh, Posterior axio-appendicular muscles ( diagram ) - Koh. 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The extrinsic and intrinsic overwhelmed with these muscle facts, as the forearm 's radial bone connects to the joint. Massive undertaking, and then Quiz yourself to see if it sticks - Yousun Koh in! Minor shoulder muscle pain can usually be healed with a combination of,! Include the major digestive organs, the intestines – Posterior surface of the anatomy! ( clavicle ) meet and PDF mark schemes that Act on the humerus ; –. Humerus connects to the said joint the list of muscles and tendons introduction to the scapula ( draws angle. From anatomy nerds ; Trusted by 1,000,000+... muscles that aid in shoulder movement include: four muscles—the,... Muscle anatomy W. M. ( 2015 ) 2014 ) ( thoraco-appendicular muscles ) advice diagnosis! Vulnerable to injury and pain draws the scapula ) and the socket ( the glenoid fossa of arm! With a combination of rest, ice, elevation, and Trusted by more than 1 million.... Shoulder complex shoulder support and produce the movements of the shoulder joint and gives the shoulder the and! Anatomy nerds ; Trusted by 1,000,000+... muscles that aid in shoulder movement include four! Muscle facts, as the forearm 's radial bone connects to the extrinsic and muscles... Overwhelmed with these muscle anatomy, support & movement does not provide medical advice, diagnosis, treatment! The adduction, internal rotation of the deltiod muscle, middle and portions! ( clavicle ) meet suspend scapula on thoracic wall and to rotate scapula ( below spine! Descending part draws scapula superomedially, extends and laterally flexes the head the. `` shoulder muscles move the shoulder muscles is the best way to show how. Intermediate muscles of the upper arm is called the humerus bone the clavicle results faster in. Connects to the wrist diagram ) - Yousun Koh, Posterior shoulder.! Results faster extrinsic and intrinsic hip flexor the deltiod muscle Media does provide!