The Anatomy of the Shoulder The shoulder is made up of two joints, the acromioclavicular joint and the glenohumeral joint. The acromioclavicular joint is where the acromion, part of the shoulder blade (scapula) and the collar bone (clavicle) meet. The glenohumeral joint is where the ball (humeral head) and the socket (the glenoid) meet The shoulder joint and its associated joints form one of the most complex joint systems of the human locomotor apparatus. Its large range of motion is made possible by the interplay of 5 joints: sternoclavicular-joint, acromioclavicular-joint, glenohumeral joint, thoracoscapular joint and subacromia
The shoulder joint is formed by the articulation of the head of the humerus with the glenoid cavity (or fossa) of the scapula. This gives rise to the alternate name for the shoulder joint - the glenohumeral joint. Like most synovial joints, the articulating surfaces are covered with hyaline cartilage Anatomy of shoulder joint 1. INTRODUCTION Shoulder joint is formed by scapula and clavicle (which is also called as shoulder girdle)and proximal humerus. It has the greatest range of motion of any joint in the body. Due to wide range of movement it is also most unstable joint compared to other joints of the body.However a series of complex ligaments and muscle keep it in joint The shoulder joint is formed where the humerus (upper arm bone) fits into the scapula (shoulder blade), like a ball and socket. Other important bones in the shoulder include: The acromion is a bony..
The synovial membrane, capsule, and ligaments of the shoulder joint are innervated by the axillary nerve and the suprascapular nerve. The joint is sensitive to pain, pressure, excessive traction, and distension A global view of all five joints of the shoulder girdle: 1, glenohumeral joint; 2, acromioclavicular joint; 3, sternoclavicular joint; 4, subacromial joint or subacromial gliding mechanism
The shoulder complex, composed of the clavicle, scapula, and humerus, is an intricately designed combination of four joints, the Glenohumeral (GH) Joint, the Acromioclavicular (AC) Joint and the Sternoclavicular (SC) Joint, and a floating joint, known as the Scapulothoracic (ST) joint The Shoulder Girdle. The anatomy of the shoulder girdle consists of several joints, or articulations, which connect the upper limb to the rest of the skeleton.You may also see this referred to as the pectoral girdle in some textbooks.. The three bones which form the shoulder girdle are the clavicle, scapula, and the humerus
Anatomy of the Shoulder Joint. * Associate Professor, Department of Anatomy, West Virginia University. Present address: Department of Anatomy, Mayo Clinic, Rochester, MN 55905. † Assistant Professor, Division of Physical Therapy, Department of Neurology, West Virginia University, Morgantown, WV 26506 Anatomy of the shoulder There are about 20 muscles supporting the shoulder and allowing it to turn and rotate in many directions. These are the largest shoulder muscles: Trapezius is a wide muscle..
Acromioclavicular joint (AC joint). The acromioclavicular joint is located where the clavicle (collarbone) glides along the acromion, located at the top of the shoulder blade. The AC joint is considered a gliding synovial joint, which means it allows the bones to move side-to-side, up and down, and diagonally 1 Anatomy and Imaging of the Shoulder Joint. Macroscopic Functional Anatomy. The head and the glenoid fossa articulate in the shoulder joint (glenohumeral joint). Functionally, it is a ball-and-socket joint that enables movement in three degrees of freedom. The shoulder is the most mobile of the major joints
The shoulder girdle is mainly made up of the true shoulder joint (glenohumeral joint) and the joint between the shoulder blade and the chest (scapulothoracic joint).When we move our arm around, movement occurs at both of these joints, with most (two thirds) occurring at the shoulder joint. The shoulder is basically like a ball and socket.The ball is the head of the humerus and the. The shoulder joint is made up several bones and soft tissues. It has three bones, the collarbone (clavicle), scapula, and humerus. Humerus provides attachment to muscles of the upper arm. Scapula is the bone that connects the upper arm bone with the collarbone. It is a flat bone and roughly triangular in shape and provides attachment to the. In this article, we will discuss about the Anatomy of the Shoulder Joint. So, let's gets started. Anatomy. Joint type- Synovial Ball and Socket Joint, Diarthrosis, and multiaxial joint. Degree of freedom- 3. Bones involved- Glenoid cavity of Scapula and Head of Humerus. Joint Spaces- Glenohumeral space (4-5 mm), Subacromial space (9-10 mm), and Axillary space
Anatomy. The shoulder is a ball and socket joint, referred to in medical terms as the gleno-humeral joint. It is a very mobile joint and relies upon a vast array of muscles to help stabilise it and allow a large range of motion. It is closely linked with the neck and shoulder blade (scapula), and the acromioclavicular joint is part of the. Basics of Anatomy: Shoulder Joint Complex Anatomy. The major ball and socket joint synonymous with the shoulder is the Glenohumeral. This is the most mobile joint... Functions. Most of the movements of the shoulder are from the glenohumeral Joint. It allows for abduction and adduction... Optimum. Muscles of the shoulder are a group of muscles surrounding the shoulder joint, which move and provide support to the said joint. Posterior axio-appendicular muscles. Extrinsic muscles: Trapezius, latissimus dorsi, levator scapulae, rhomboid major, rhomboid minor The shoulder is one of the most sophisticated and complicated joints of the body. It has the greatest range of motion of any joint. The co ordinated activity of numerous muscles working together in patterns is necessary to achieve this. It is made up of four joints and five groups of bones. To allow such a wide range of movement, shoulder joints need to be able to move freel The shoulder - anatomy of the shoulder joint . The shoulder girdle is the most mobile joint in the human body. More precisely, it consists of several joints that work together. The shoulder makes it possible for us to spread our arms in different directions, bend and extend them, and circle them upwards
Anatomy of the Shoulder. The shoulder is made up of several layers, including: Bones. The collarbone (clavicle), the shoulder blade (scapula), and the upper arm bone (humerus). Joints. The place where movement occurs, including the following: Sternoclavicular joint (where the clavicle meets the sternum) Acromioclavicular (AC) joint (where the. . The shoulder is a ball and socket joint. The ball is at the top of the upper arm bone (humerus) and the socket (glenoid) is part of the shoulder blade (scapula). When you lift your arm or reach overhead both parts of the joint are moving in a coordinated way to give you mobility. This is controlled by muscles Normal Anatomy of the Shoulder Joint web based movie. The shoulder is the most flexible joint in the body making it the most susceptible to instability and injury. It is a 'ball-and-socket' joint. A 'ball' at the top of the upper arm bone, humerus, fits neatly into a 'socket', called the glenoid, which is part of the shoulder blade. human heart and vascular system - shoulder joint anatomy stock pictures, royalty-free photos & images. course and branching of the axillary dextra - shoulder joint anatomy stock illustrations. upper body bones, artwork - shoulder joint anatomy stock illustrations. skeletal shoulder, illustration - shoulder joint anatomy stock illustrations Shoulder Joint Structure. The shoulder is located where the humerus (upper arm), clavicle (collarbone), and scapula (shoulder blade) meet. While many people think of the shoulder as a single joint, the shoulder actually has four joints: The glenohumeral joint is what most people think of as the shoulder joint
Anatomy of the Shoulder: The shoulder includes three bones: the humorous, scapula, and the clavicle. There are also four main joints in the shoulder. The first joint is called the glenohumeral joint. This joint is what everyone commonly knows as the ball-and-socket joint. This is where the ball (head of the humorous) fits into the socket. Shoulder Muscles Deltoid. When people refer to the shoulders, they would most likely refer to their deltoids. The deltoid is also known... Biceps. The biceps is a bi-articular, double-headed muscle on the front part of the upper arm. It is responsible for the... Rotator Cuff. Your rotator cuff is a. The glenohumearal joint has a greater range of motion than any other joint in the body. The small size of the glenoid fossa and the relative laxity of the joint capsule renders the joint relatively unstable and prone to subluxation and dislocation. MR is the best imaging modality to examen patients with shoulder pain and instability Shoulder. Simply put, the shoulder, or shoulder joint, is the connection of the upper arm and the thorax. Comprising of numerous ligamentous and muscular structures, the only actual bony articulations are the glenohumeral joint and the acromioclavicular joint (ACJ). The shoulder allows for a large range of motion, but is also more prone to.
. 20 This landmark work used comparative anatomy, human dissection, the laws of mechanics, photography, and the electromyogram. 20 All subsequent publications on the function of the shoulder might support or contradict findings in this. Shoulder fractures commonly involve the clavicle (collarbone), humerus (upper arm bone), and scapula (shoulder blade). Shoulder fractures in older patients are often the result of a fall from standing height. In younger patients, shoulder fractures are often caused by a high energy injury, such as a motor vehicle accident or contact sports injury Shoulder Joint Anatomy Diagram. Shoulder Joint Anatomy Diagram / Anatomy Of Shoulder Joint Vamshi Kiran. Shoulder joint is the most mobile joint of the human body. Humerus, humerus head, spatula, acetabulum, acromion, clavicle, clavivular joint, coracoid process. 8 name the arteries and the. Moderate to serve pain along the outer edge of the.
Shoulder Joint Anatomy and Pain. The shoulder is located where the arm meets the torso and is comprised of and functions with the following basic components: Shoulder bones. The bones must maintain their strength and smooth surface in order to move easily against each other. Development of boney growths, called osteophytes or bone spurs, may. 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. The muscles of the shoulder have a wide range of functions, including abduction, adduction, flexion, extension, internal and external rotation.  The central bony structure of the shoulder is the scapula, where all of the muscles interact The shoulder joint comprises parts of the following bone structures: the head of the humerus: spherical end of the humerus. the glenoid cavity: shallow concave surface on the shoulder blade. the acromioclavicular joint: connection to the clavicle. When in a healthy condition, all parts of the joint are surrounded by joint cartilage which acts. Located superior to the shoulder joint, the deltoid muscle works with the supraspinatus to abduct the arm at the shoulder. On the anterior side of the shoulder, the coracobrachialis, serratus anterior, pectoralis major, and pectoralis minor muscles work as a group to flex and adduct the scapula and humerus anteriorly toward the sternum
Human Shoulder Anatomy and Physiology Bones of the Shoulder. Scapula - wing bone, or blade bone connects the humerus and clavicle and lies on the back of the... Tendons and Ligaments of the Shoulder and Armpit. The Glenoid cavity is a shallow depression in the scapula, that... Shoulder Muscles.. The Shoulder Joint. Primarily made up by the articulation of the head of the humerus with the glenoid fossa of the scapula, the shoulder joint (also known as the glenohumeral joint) is the most mobile joint in the human body. It is a synovial, ball-and-socket, and tri-axial joint. It allows for motion within 3 planes and around 3 axes, making. 856 shoulder joint anatomy stock photos are available royalty-free. Reset All Filters. Shoulder joint pain. 3D human anatomy illustrated showing chronic shoulder joint pain. Articulated humerus clavicle and scapula bones showing human left shoulder joint anatomy in white background. Articulated humerus clavicle and scapula bones showing human. 3D video anatomy tutorial on the shoulder joint. Transcription. This is a tutorial on the glenohumeral joint.The glenohumeral joint is, as the name suggests a joint between the head of the humerus and the glenoid cavity of the scapula.. You can see the glenoid cavity of the scapula here
Anatomy of the acromioclavicular joint. The coracoclavicular ligaments (conoid and trapezoid) and the primary vertical stabilizer. The superior acromioclavicular ligament is the primary horizontal stabilizer. (From Squire ME, Esmail AN, Soslowsky LJ. Anatomy and biomechanics of the shoulder. In: McGinty JB, Burkhart SS, Jackson RW . What can you tell us about how these joints work? Find out in this Anatomy of the Shoulder Quiz Shoulder Anatomy. 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. The coordinated activity of numerous muscles working together in set patterns is required to produce. Shoulder MRI includes assessments of the joint's bone structures, including the proximal humerus (upper limb's long bone; shoulder to elbow), scapula (shoulder blade) and glenoid (end of the scapula), coracoid process (bone structure located below the lateral fourth of the clavicle), acromion (the shoulder's highest point), and the distal. Shoulder Anatomy. The shoulder is made up of three bones: the scapula (shoulder blade), clavicle (collarbone) and humerus (upper arm bone). Two joints in the shoulder allow it to move: the acromioclavicular joint, where the highest point of the scapula (acromion) meets the clavicle, and the glenohumeral joint
The glenohumeral joint is structurally a ball-and-socket joint and functionally is considered a diarthrodial, multiaxial, joint. The glenohumeral articulation involves the humeral head with the glenoid cavity of the scapula, and it represents the major articulation of the shoulder girdle. The latter The shoulder comprises bones, ligaments, tendons, and muscles that connect the arm to the torso. The three bones that make up the shoulder joint include the clavicle (collarbone), scapula (shoulder blade), and humerus (long bone of the arm). The shoulder has two joints that work together to allow arm movement. The acromioclavicular (AC) joint is a gliding joint formed between the clavicle and. . The shoulder muscles are associated with movements of the upper limb. The anterior deltoid, the lateral deltoid, and the posterior deltoid. Diagram shoulder muscles human anatomy shoulder muscles amazing neck and shoulder muscles <p>The shoulder is the most flexible joint in the body enabling a wide range of movements including: forward flexion, abduction, adduction, external rotation, internal rotation, and 360-degree circumduction.</p> <p>As a result, the shoulder joint is considered the most insecure joint of the body but the support of ligaments, muscles and tendons function to provide the required stability. </p>
Anatomynote.com found Right Shoulder Joint Anterior And Posterior View from plenty of anatomical pictures on the internet. We think this is the most useful anatomy picture that you need. You can click the image to magnify if you cannot see clearly. This image added by admin. Thank you for visit anatomynote.com. We hope you can get the exact. Nov 29, 2019 - Explore jay's board Shoulder joint anatomy on Pinterest. See more ideas about joints anatomy, shoulder joint, shoulder joint anatomy Anatomy of the shoulder joint. The humerus, glenoid, scapula, acromion, clavicle and surrounding soft tissues make up the shoulder. There are three significant articulations: the sternoclavicular joint, the acromioclavicular joint and the glenohumeral joint. The glenohumeral joint is the most commonly dislocated major joint in the body The shoulder-joint is an enarthrodial or ball-and-socket joint. The bones entering into its formation are the hemispherical head of the humerus and the shallow glenoid cavity of the scapula, an arrangement which permits of very considerable movement, while the joint itself is protected against displacement by the tendons which surround it Shoulder Muscle Anatomy Diagram : Anatomy Of The Human Shoulder Joint. The shoulder joint is formed the rotator cuff is a collection of muscles and tendons that surround the shoulder, giving it. Supraspinatus, infraspinatus, ters minor,.et), using interactive animations and labeled diagrams
Introduction. The glenohumeral joint is structurally a ball-and-socket joint and functionally is considered a diarthrodial, multiaxial, joint. The glenohumeral articulation involves the humeral head with the glenoid cavity of the scapula, and it represents the major articulation of the shoulder girdle. The latter also includes minor articulations of the sternoclavicular (SC), acromioclavicular. Anatomy 101: Shoulder Bones. August 2, 2017 / The Hand Society. There are five major bones in the shoulder. The shoulder bones can easily be affected by falls or accidents, in addition to arthritis. Here is an overview of the shoulder bones: Scapula: Another name for this bone is the shoulder blade. There are 17 muscles that attach to the scapula
A Patient's Guide to Shoulder Anatomy . Introduction. The shoulder is an elegant piece of machinery. It has the greatest range of motion of any joint in the body. However, this large range of motion can lead to joint problems The joint capsule is large, loose and redundant: the capacity of the glenohumeral joint capsule is larger than that of the humeral head to allow full and free range of motion of the shoulder. At the anterior portion of the capsule three local reinforcements are present: the superior, medial and inferior glenohumeral ligaments ( Fig. 6 ) 5 Joints of the shoulder its an articulation between the subscapular fossa of the scapula and the thoracic wall it stabilizes the shoulder region during lifting facilitates overhead movement A Brief Description: Shoulder Joint Anatomy. The shoulder is one of the largest and most complex joints in the body. The shoulder joint is formed where the humerus (upper arm bone) fits into the scapula (shoulder blade), like a ball and socket. The acromion is a bony projection off the scapula. The clavicle (collarbone) meets the acromion in.
anatomy of the shoulder. Sternoclavicular joint. The sternoclavicular joint is more complex. It is formed by the articular surface at the medial aspect of the clavicle and . the articular surface at the superolateral corner of the sternal manubrium. The two joint surfaces are discongruent an Shoulder stability. One of the many remarkable features of the normal shoulder is that the glenohumeral joint (the ball and socket joint between the upper arm bone and shoulder blade) is very stable in spite of the vast range of motion available to the joint (see figure 1) Anatomy of a Joint. Joints are the areas where 2 or more bones meet. Most joints are mobile, allowing the bones to move. Joints consist of the following: Cartilage. This is a type of tissue that covers the surface of a bone at a joint. Cartilage helps reduce the friction of movement within a joint. Synovial membrane This diagram depicts shoulder muscle diagram. 17 photos of the diagram of shoulder muscles and tendons. Human muscle diagram page 7 graph diagram. In human anatomy the shoulder joint comprises the part of the body where the humerus attaches to the scapula the head sitting in the glenoid cavity. Muscles allow a person to move The glenohumeral joint is structurally a ball-and-socket joint and functionally is considered a diarthrodial, multiaxial, joint. The glenohumeral articulation involves the humeral head with the glenoid cavity of the scapula, and it represents the major articulation of the shoulder girdle. The latter also includes minor articulations of the sternoclavicular (SC), acromioclavicular (AC.
shoulder joint anatomy. this image shows the anatomy of the shoulder joint from posterior view displaying the bones, tendons and muscles of the joint in relation to each other. showing: 1. supraspinatus muscle 2. spine of the scapula 3. clavicle bone 4. acromion process of the scapula 5 Shoulder anatomy. Shoulder anatomy is actually four joints wrapped up in one arm. Shoulder anatomy is made up primarily of bones, muscles, ligaments, nerves and blood vessels. The arm bone (humerus), the shoulder blade (scapular), the collar bone (clavicle), and the rib cage (bony thorax) make up the relevant bones shoulder joint . For this reason, the US operator carrying out the examination of the shoulder must be thoroughly familiar with the anatomy of the structures which are normally studied by US, i.e. tendons and muscles, but also with all the other structures forming the joint such as serous bursae, ligaments, nerves and bones in order t 3D Video of Shoulder Joint Anatomy: The Shoulder Joint is Formed by Glenohumeral, Acromio-Clavicular Joints. Glenohumeral Joint Is A Ball And Socket Joint Formed By Humerus and Glenoid Cavity. Acromio-Clavicular Joint Is A Link Between Acromion And Clavicular Bone humerus or due to an inferior dislocation of shoulder joint. •Effects: •Loss or weakness of abduction of shoulder (between 15 degrees to 90 degrees) due to paralysis of Deltoid. •Rounded contour/profile of shoulder is lost due to paralysis of deltoid •Sensory loss over lower half of the outer aspect of shoulder 'regimental badge area'
Thoracic Limb Shoulder Joint. The shoulder joint is the articulation between the glenoid cavity of the scapula and the head of the humerus.In the horse, lateral and medial movements of this joint are impossible due to the shape of the humeral head; movement is therefore limited to flexion and extension. The joint is strengthened by the medial and lateral glenohumeral ligaments A joint capsule is a watertight sac that surrounds a joint. In the shoulder, the joint capsule is formed by a group of ligaments that connect the humerus to the glenoid. These ligaments are the main source of stability for the shoulder. They help hold the shoulder in place and keep it from dislocating Basic shoulder anatomy. The shoulder is a ball and socket type of synovial joint. It is one of the largest and most complex joints in the body. Its dynamic and hypermobility make it susceptible to many injuries. The shoulder girdle comprises of glenohumeral joint, acromioclavicular joint, scapulothoracic articulation, and coracoclavicular.
Shoulder Ligaments. Ligaments are soft tissue structures that connect bones to bones. There are several important ligaments in the shoulder. Glenohumeral Ligaments (GHL): A joint capsule is a watertight sac that surrounds a joint. In the shoulder, the joint capsule is formed by a group of ligaments that connect the humerus to the glenoid. These. Dec 27, 2019 - Explore Weam Elbohy's board Shoulder joint on Pinterest. See more ideas about shoulder anatomy, shoulder joint, rotator cuff Shoulder joint has a socket and a ball shaped head of humerus. Socket is circular in shape and rim of socket is made up of cartilage. The cartilaginous rim of the socket is known as shoulder labrum. Labrum provides a depth to shallow socket of shoulder joint thus providing stability. Tendons and ligaments are attached to labrum The Shoulder Joint Of all the joints, this one has the biggest range thanks to its socket articulation: it can rotate 360º continuously. But that also means it can pop out of place if pushed too hard, which is why the well-known lock shown below is so effective: the shoulder joint is stretched to its limit by the pressure, and would dislocate. The shoulder is made up of three joints: Glenohumeral joint Acromioclavicular joint Sternoclavicular joint
The Infraspinatus muscle is one of the four rotator cuff muscles crossing the shoulder joint and is commonly injured. It is the main external rotator of the shoulder joint. Origin - Posterior surface of the scapula (below the spine of the scapula). Insertion - Greater tuberosity on the humerus. Actions - Shoulder horizontal abduction Shoulder bursae refers to sacs surrounding the shoulder joint that are filled with synovial fluid. As with bursae in general, they facilitate movement and reduce friction at tendon-tendon and tendon-bone interfaces.. There are five main bursae around the shoulder. They include: subacromial-subdeltoid (SASD) bursa; subscapular recess; subcoracoid burs CHAPTER 4 Functional Anatomy of the Shoulder 117 FIGURE 4.5 Rotation of Clavicle on Arm Overhead Elevation A, Without clavicular rotation about sternoclavicular joint, arm can elevate only 30 degrees. B, As there is rotation of clavicle, scapula elevates 60 degrees shoulder joint anatomy. this image shows the anatomy of the shoulder joint from anterior view displaying the bones, ligaments and muscles in relation to each other. showing: 1. clavicle bone 2. coracoclavicular ligament 3. acromioclavicular joint 4. acromion process of the scapula 5. co Anatomy of the shoulder (CT arthrography) CT arthrogram of the shoulder joint. CT arthrogram of the shoulder joint : Sagittal section. CT arthrogram of the shoulder joint : Coronal section. CT arthrogram of the shoulder joint : 3D. CT arthrogram of the shoulder joint : Radiographs. Invalid input
Shoulder joint_Bony elements (Anterior view) The shoulder joint is a multiaxial synovial ball and socket joint and involves articulation between the glenoid cavity of the scapula (shoulder blade) and the head of the humerus (upper arm bone). shoulder anatomy stock illustration In addition to the rotator cuff there are a number of other shoulder muscles, including: The deltoid, a triangular-shaped muscle that covers the glenohumeral joint.The deltoid is responsible for a number of things, such as preventing joint dislocation when lifting heavy objects, helping raise the arm, and aiding other muscles in the chest.; The triceps brachii, a muscle that assists in. Shoulder Anatomy. Figure 1- Vascular Anatomy of Shoulder. Figure 2 - Neurovascular skin markings. Figure 3 - Superior View - AC skin markings. Figure 4 - Superior View with AC injection guide. Figure 5 - Anterior Boney Landmarks on Skin. Figure 6 - Sagital View of shoulder with bone landmarks. Figure 7 - Sagital view of shoulder.
Anatomy of a skeleton foot. Shoulder replacement. surgery. The types of prosthesis of shoulder. Hand with rheumatoid arthritis. The ankle joint, tendons of the ankle joint foot anatomy vector illustration. Shoulder impingement, , medical posters with symbols, vector illustration This book provides detailed information on functional anatomy, physical examination, and clinical radiology of the shoulder with a view to enabling the clinician to identify the most suitable treatment approach to different shoulder joint pathologies Phases of Throwing. There are 5 main phases of throwing. wind up (see below) cocking. acceleration. deceleration. follow-through. Biomechanics. scapula must work in concert with humerus to maintain glenohumeral stability Anatomy. The shoulder is a synovial articulation between the glenoid and the humeral head in which the shallow glenoid articulation is deepened an additional 50% by the fibrocartilaginous labrum that forms a rim around the perimeter of the glenoid ().Both the glenoid and the humeral head are covered by a layer of hyaline articular cartilage Browse 3,088 anatomy of neck and shoulder stock photos and images available, or start a new search to explore more stock photos and images. Pain in a man's body Pain in a man's body on a gray background. Collage of several photos with red dots anatomy of neck and shoulder stock pictures, royalty-free photos & images
Nimura A, Kato A, Yamaguchi K, Mochizuki T, Okawa A, Sugaya H, Akita K. The superior capsule of the shoulder joint complements the insertion of the rotator cuff. J Shoulder Elb Surg. 2012;21(7):867-72. CrossRef Google Schola Circumduction. Circumduction at the shoulder joint is the motion whereby the distal end of the humerus moves in a 360-degree circular motion lateral to the body. This circular motion can be clockwise or anticlockwise and can be achieved in most forms of flexion, extension and abduction. Most of the muscles acting on the shoulder are active. Shoulder pain is prominent when impingement occurs at the suprascapular notch, along with weakness of the supraspinatus and infraspinatus muscles. When nerve injury occurs at the level of the spinoglenoid notch, a painless weakness of external rotation and atrophy of the infraspinatus will occur. 67. Posterior injection of the shoulder joint The subtalar joint moves in concert with the talonavicular joint and the calcaneocuboid joint, two joints located near the front of the talus. Figure 6: Calcaneal Anatomy Bones of the midfoot : Cuboid, Navicular, Cuneiform (3)