As such, it has inherent instability, as its great. The seventh edition of basic biomechanics has been significantly updated from the previous edition. Pediatric and adolescent shoulder instability matthew d. The file size of this svg image may be abnormally large because most or all of its text has been converted to paths rather than using the more conventional element. Biomechanics of the shoulder complex look at how the entire shoulder complex moves and start to get a feel for where the restrictions are and where they compensate. Athletes often incur injuries of the shoulder as they subject the joint to extreme ranges of motion and force, as well as excessive repetitions of these motions 2. Shoulder impingement is a common condition believed to contribute to the development or progression of rotator cuff disease michener et al. Biomechanical relationships within the shoulder joint.
Movements of the human shoulder represent the result of a complex dynamic interplay of structural bony anatomy and biomechanics, static ligamentous and tendinous restraints, and dynamic muscle forces. Written by active clinicians with more than 40 combined years of clinical and teaching. Shoulder joint, shoulder girdle, latissimus dorsi, elbow, trapezius, anteriorposterior. Although this joint is considered a ball humerus and socket glenoid joint, the socket covers only onequarter of the humeral head. In order to better understand the biomechanics of the shoulder it is important to understand its anatomy. The biomechanics of the glenohumeral joint depend on the interaction of both static and dynamicstabilizing structures. Clinical mechanics and kinesiology pdf with web resource. Ward, samuel hanical applications to joint structure levangie p. Request pdf biomechanics of the shoulder the glenohumeral gh joint has the greatest range of motion of any joint in the human body.
Unless rendering the text of the svg file produces an image with text that is incurably unreadable due to technical limitations, it is highly recommended to change the paths back to text. With a background in mechanical and biomedical engineering, his specialty is. Biomechanics of glenohumeral joint ppt xpowerpoint. Jan 04, 2017 shoulder joint anatomy medvizz anatomy medical animations. This puts greater demands on the muscles for securing the shoulder girdle on thorax during static and dynamic conditions dynamic stabilization. Shoulder joint, shoulder girdle, latissimus dorsi, elbow.
Atraumatic shoulder pain for the primary care physician. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Shoulder biomechanics and exercises medbridge blog. Describe the purpose and components of the tests and measures for the shoulder complex. Only sc joint connects the components of shoulder joint to the axial skeleton. Deltoid force was maximal with the arm abducted 90, and was calculated to be 8. Biomechanical relationships within the shoulder joint by william cornelius, ph. To understand the biomechanical proprieties of the. Dont wait until later to see if your treatment affected the.
To effectively rehabilitate a shoulder injury in clinical practice, it is important to have a functional knowledge of the underlying biomechanics. Pdf balancing mobility and stability, the biomechanics of the shoulder provides optimal use of the thumb and hand. Shoulder joint anatomy medvizz anatomy medical animations. Introduction shoulder joint gh joint has more mobility than stability. Injury to 1 or more of these components through overuse or acute trauma disrupts this complex. The shoulder system provides a wide range of motion, to the detriment of stability. Summary mans girdle s the general of his treeswinging ancestors, with of the posture, thorax has from anteriorposterior. Anterior and posterior axial rotation inferior to superior was reported by dempster to be about 60 degrees in cadaveric shoulders without the thorax. Describe the biomechanics of the shoulder complex, including the open and closepacked positions, muscle force couples, and the static and dynamic stabilizers. A force couple is defined as two equal but oppositely directed forces acting simultaneously on opposite sides of an axis that generates rotation. Functionally, the knee comprises 2 articulationsthe patellofemoral and tibiofemoral. Unsatisfied with function or level of pain after 812 months of physical therapy. Biomechanics of shoulder complex linkedin slideshare.
Nissen, mda,b introduction shoulder instability in young patients is a wellrecognized spectrum of disease, from common traumatic anterior dislocations to. To effectively rehabilitate a shoulder injury in clinical practice, it is important to have a functional knowledge of the underlying biomechanics of the. Review anatomy of shoulder complex and its function. The biomechanics of sprinting acceleration blocks national coach development weekend. Because of the multiple joints involved during shoulder movement, it is prudent to refer to the area as the shoulder complex. The glenohumeral joint is what the layman and many in the healthcare field think of as the shoulder joint. Bhanu prakash usmle, fmge and neet pg 85,835 views. Nissen, mda,b introduction shoulder instability in young patients is a wellrecognized spectrum of disease, from common traumatic anterior dislocations to recurrent multidirectional instability mdi. The overhead throwing motion places tremendous demands on the shoulder joint complex musculature to produce functional stability. Biomechanics of the shoulder joint jama surgery jama. Its base is attached to the m ar gin of the glenoid fossa by fibrocartilage and fibrous bone.
To a greater or lesser extent, instability characterizes all of the systems joints and in. Biomechanics research laboratory trauma center murnauand paracelsus private medical university salzburg, germany. Ac joint plane synovial joint 3 rotational and 3 translational degrees of freedom the primary function of the ac joint is to allow the scapula additional range of rotation on the thorax and allow for adjustments of the scapula outside the initial plane of the scapula in order to follow the changing shape of the thorax as arm movement occurs. A thickening of m iddle layer reinforces the axillary pouch. Which muscle is a powerful defense to the front of the shoulder joint, preventing displacement of the head of the humerus. Pdf biomechanical basis of common shoulder problems.
Sep 25, 2015 shoulder joint anatomy medvizz anatomy medical animations. View and download powerpoint presentations on biomechanics of glenohumeral joint ppt. Relative balance of serratus anterior and upper trapezius muscle activity during pushup exercises. It discusses bones, ligaments, muscles and other structures that make up the shoulder joint. Research from jama surgery biomechanics of the shoulder joint. Shooting technique and biomechanics 15 bow arm, shoulder joint, elbow and wrist 19 head position and spine 22 drawing arm, shoulder, elbow and wrist 23 compound archer 24. Normal anatomy and biomechanics of the knee fred flandry, md, facsw and gabriel hommel, md abstract. Analysis of the muscle and joint forces in the shoulder joint using the anybody simulation model alexander nolte 1, peter augat2, john rasmussen 3 1.
This paper was presented at the 1 st congress of asiapacific knee, arthroscopy and sports medicine society in april. Biomechanics of pitching with emphasis upon shoulder. Static stabilizers include the bony anatomy, negative intraarticular pressure, the glenoid labrum, and the glenohumeral ligaments along with the joint capsule. Shoulder biomechanics lecture originally developed by bryan morrison, ph. The shoulder area is infamously known to be one of the most complex regions of the body to evaluate and rehabilitate. Clinical mechanics and kinesiology with web resource provides a solid foundation so that students of physical therapy, occupational therapy, and athletic training can understand biomechanics and functional anatomy as they relate to both normal and abnormal movement. A total shoulder limitation motion, to slightly of humem i head if rotator with a prosthesis. Key objectives for acceleration application of force. Helps to stabilize the shoulder joint by keeping the head of the humerus firmly pressed medially against the glenoid fossa of the scapula 16. C ontrary to the anterior joint capsule, the posterior is quite thin. The surrounding musculature must be strong enough to assist in. Flexionextension the normal range of elbow motion in.
Bio mechanics of the shoulder free download as powerpoint presentation. Find powerpoint presentations and slides using the power of, find free presentations research about biomechanics of glenohumeral joint ppt. Biomechanics of pitching with emphasis upon shoulder kinematics charles i. Bhanu prakash usmle, fmge and neet pg 87,698 views. The shoulder s ability for multiple degrees of motion is based on the interaction of multiple structures that react to mechanical stimuli and adjust accordingly. Elbow biomechanics kinematics together with the shoulder, the elbow acts to position the hand in space. Biomechanics of the shoulder joint jama surgery jama network. There is a fine balance between the mobility to perform athletic activities and stability required to power and stabilise the arm. Mar 31, 2020 the shoulder is an intricate multidimensional joint complex consisting of four separate connection points of bones responsible for the movement of the hand, arm and shoulder. This chapter addresses the anatomy and biomechanics, especially the recently acquired knowledge, pertaining to diagnoses and treatments frequently encountered by the shoulder surgeon.
The approach taken remains an integrated balance of. In mechanical terms, the shoulder joint system is a mechanism with multiple degrees of freedom. Ludewig pm, hoff ms, osowski ee, meschke sa, rundquist pj. Glenohumeral ligaments static ligamentous restraints in different arm positions. Glenohumeral joint anatomy, stabilizer, and biomechanics. Stability of the joint is governed by a combination of static ligaments, dynamic muscular forces, meniscocapsular aponeurosis, bony topography, and joint load.
Lennard funk the shoulder is potentially one of the most unstable joints of the body, with very little bony stability or containment and has been likened to a golf ball on a golf tee. Functional anatomy of the shoulder pubmed central pmc. His expertise is in using a robotic manipulator to study knee joint biomechanics to improve injury prevention and repair techniques. Clinical anatomy and biomechanics of the glenohumeral. Analyze overall mechanical effects on shoulder during movement. Boguszewski is an assistant professor of orthopaedic surgery. The shoulder, being the most mobile joint of the human body, is highly susceptible to injury 1. The biomechanics of the shoulder is how the shoulder moves, as well as the scientific study of this movement. Written by active clinicians with more than 40 combined years of clinical and teaching experience, this text is also a practical. At 60 of abduction, the downward short rotator force was maximal at 9. This generous amount of mobility can lead to a multitude of intrinsic ailments about the shoulder and, in fact, a majority of shoulder problems stem from this relative lack of bony stability. In mechanics, a couple is a system of forces that results in a moment without a.
The anatomies and biomechanics of the glenohumeral joint and the scapulothoracic articulation are the subjects of this article. Andrews, md the american sports medicine insfitute conducts research to increase understanding of mechanisms involved in upper extremity injuries to throwing athletes. The shoulder joint is unique, as multiplanar mobility of the joint is dominant over static stability. The biomechanics of the shoulder joint has been an active area of study for many years. The shoulder duttons orthopaedic examination, evaluation. The purpose of this manuscript is to identify recent advances in understanding of normal and abnormal biomechanics of the shoulder as related to rehabilitation of shoulder impingement. Biomechanics and assessment of the painful shoulder. Associate professor of education, university of north texas the shoulder joint consists primarily of the glenoid fossa of the scapula and humeral head. In particular, contributions of sternoclavicular sc and ac joint motions to overall scapulothoracic st motion during arm elevation will be discussed. Shoulder girdle permits largest rom of any complex in the body shoulder girdle increases rom with less compromise of stability scapulohumeral rhythm 4 joints vs. Objectives of a volleyball swing achieve maximum vertical height through the approach to the net swing at highest contact point generate as much arm swing as possible driving. The glenohumeral joint motion is a result of a complex interplay between the passive and active stabilizers that require intricate balance and synchronicity. Observations on the function of the shoulder joint. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Clinical anatomy and biomechanics of the glenohumeral joint. In this article, we describe the basic knowledge about shoulder biomechanics, which is thought to be useful for shoulder surgeons to perform surgeries, and introduce our recent experiment data and latest biomechanics information. Shoulder joint position sense improves with elevation angle in a novel, unconstrained task, journal of orthopaedic research 24. This puts greater demands on the muscles for securing the shoulder girdle. Effects of the glenoid labrum and glenohumeral abduction on stability of the shoulder joint through concavitycompression. It is important to reevaluate functional mechanics before and after each treatment intervention. Describe the relationship between muscle imbalance and functional performance of the shoulder. Compared to the shoulder, which has a large range of motion in all three axes of rotation, elbow range of motion is relatively constrained. A number of impingement categories have been identified including subacromial impingement or external impingement.1320 874 194 922 1550 353 1266 1156 799 8 767 1601 66 271 1361 917 1339 192 400 1022 956 1445 448 219 235 590 878 1409 832 126 175 1136 799 698 804 1275 1593 398 362 1110 1129 477 883 1381 906 261 531