The deltoid muscle was named after the greek letter delta because of the similar triangular shape. This long, thin muscle originates from the wing of the atlas. Instead, the action of these fibres is to raise the scapula by rotating the clavicle about the sternoclavicular joint or to draw the scapula and clavicle backwards. However, the trapezius, which covers a broad area of the back of your neck and upper back, serves multiple functions. Trapezius trigger points are raised parts of the trapezius muscle, which is the large band of muscles that spans your upper back, shoulders, and neck. The upper fibers, the middle fibers called the middle trapezius, and the lower fibers called the lower traps.
This means that the trapezius muscle lifts the shoulder girdle up i. Trapezius pars clavicularis origin inferior edge of occipital bone. Nov 18, 2016 the mean standard deviation vertical height of the medial side of the trapezius muscle origin was 35. Learn about its function, origin, insertion and innervation and find out more about the back muscles in our free article. Functional morphology of the muscular sling at the. Upper part elevates it cranially, lower one pulls it down caudally innervation. The origin is the lower ligamentum nuchea, and the spines of c7 and t1.
Figures below are from hamilton and luttgens, page 102. It frequently becomes tight and contracted if you sit for long hours at a desk. The term rhomboid is derived from the greek rhombos meaning, a magicians circle. Trapezius muscles definition of trapezius muscles by. The pectoralis major from latin pectus, meaning breast is a thick, fanshaped muscle, situated at the chest of the human body. The arterial supply to appendages of the goat capra hircus. Name of the muscle origin insertion functions nerves. You should feel a stretch on the right side of your neck.
Tuck your chin towards your left collar bone as far as you can without slouching. Where does it attach and what actions does it perform. Origin med third sup nuchal line, lig nuchae, spinous processes and supraspinous ligs to t12 action lat rotates, elevates and retracts scapula. Forelimb musculature of kangaroos with particular emphasis on the tammar wallaby macropus eugenii desmarest, 1817 article pdf available in australian mammalogy 321 january 2010 with 815 reads. Hbs muscle origin, insertion, action questions and study. The paired trapezius muscles form a diamond that attaches medially to the superior nuchal line of the occiput, the external occipital protuberance, ligamentum nuchae, and apices of the spinous processes and their supraspinous ligaments from c7 down to t12. It arises from the anterior border and upper surface of the lateral third of the clavicle clavicular part.
Medial superior nuchal line and external protuberance of occipital bone, ligamentum nuchae and spinous process of c7t12. Therefore, with a complete transection of the accessory nerve in the posterior triangle of the neck, the patient will still have intact upper trapezius function and shoulder shrug. Trapezius pars transversa zorgt voor mediorotatie van scapula. Trapezius muscle upper, middle, lower spasm, chronic pain. When viewed together, the two trapezius muscles together roughly form a diamond or trapezoid shape, responsible for the trapezius name. This part is the first in a series of more than 30 specialized fields of medicine. Trapezius definition and meaning collins english dictionary. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Trapezius pars acromialis origin spinous processes of vertebrae c6 to t3. A fatigue exercise did not alter this pattern, though all muscles showed an increased latency.
The trapezius muscle is a large, paired, triangular shaped muscle located superficially in the back of the neck and thorax. Trapezius origin, insertion, action and innervation the. Dissection iback musclesorigin, insertion, innervation. The trapezius muscle may be best known as a source of stiffness across the top of the shoulders. Only lockhart, hamilton, and fyfe9 define both the origin and insertion of each part of the trapezius, yet they stipulate that the highest part of the muscle arises from the occiput and the upper half of the ligamentum nuchae and inserts into the clavicle. Note that these branches from the cervical roots go directly to the upper trapezius muscle. Insertion upper fibers to lateral third of posterior border of clavicle. From the field of physical therapy, orthopedics, surgery, pediatric gynecology and many more.
The trapezius muscle is this months muscle of the month. The trapezius is a broad, flat, superficial muscle extending from the cervical to thoracic region on the posterior aspect of the neck and trunk. Learn the anatomy of the trapezius muscle faster with this trunk wall muscle reference chart. Muscles of the human musculoskeletal system online library. Pdf forelimb musculature of kangaroos with particular. The deltoid muscle is located on the outer aspect of the shoulder and gives the shoulder its rounded contour. May 04, 2015 the trapezius muscle is this months muscle of the month. From this origin they proceed downward and laterally to be inserted into the posterior border of the lateral third of the clavicle. Mar 23, 2009 trapezius pars transversa zorgt voor mediorotatie van scapula. Glossary of the muscular system learn muscular anatomy.
The division into the separate, distinct parts of this muscle is about functionality. This means that the trapezius muscle pulls the scapula, or shoulder blade, rearward such that it approaches the spine. Origin and development of cucullaris trapezius sternocleoidomastoid muscles in birds, mammals and reptiles. Supraspinatus, infraspinatus, ters minor,et, using interactive animations and labeled diagrams. This lesson will provide all types of information about this muscle, including its. Meaning, pronunciation, translations and examples log in dictionary. It passed dorsally along the cranial border of the m. Trapezius pars acromialis i cranial lip of scapular spine.
Do not memorize the origins, insertions and actions for this muscle in thompson and floyd since they list only three parts of the trapezius. As nouns the difference between trapezius and trapezium is that trapezius is anatomy a large vertebrate skeletal muscle divided into an ascending, descending, and transverse portion, attaching the neck and central spine to the outer extremity of the scapula. Johnson 1994 argues that the essentially transverse orientation of the upper and middle fibres of trapezius precludes any action as elevators of the scapula as commonly depicted. The effect of a resistancetraining program on muscle. Trapezius definition of trapezius by the free dictionary. Dissection studies revealed the fascicular anatomy of the trapezius. The muscle anatomy of the trapezius origin, insertion, action, innervation and vascular supply.
As mentioned above, the trapezius muscle is divided into 3 areas. Trapezius definition of trapezius by merriamwebster. Oct 28, 20 stretches for the trapezius and the rhomboids. Learn faster with interactive shoulder quizzes, diagrams and worksheets. It makes up the bulk of the chest muscles and lies under the breast. Trapezius pars acromialis insertion medial margin of acromial process and distal end of scapular spine.
Fungsi otototot free download as powerpoint presentation. Regarding the trapezius muscles, conscious abdominal contraction is effective when combined with a bilateral pushup exercise, but not with the 3point pushup, reinforcing the importance of the type of exercise on muscular behavior. It is the most superficial muscle in the upper back and along with its pair on the opposite side forms a trapezium, hence its name. Origin medial third superior nuchal line, ligament nuchae, spinous processes and supraspinous ligaments to t12. Beneath the pectoralis major is the pectoralis minor, a thin, triangular muscle. Insertion superior portion of the scapula the groove behind the clavicle.
The trapezius muscle is a flat triangular muscle that extends over the back of the neck and upper thorax. The origin of the cervical part extends from the third to seventh and last cervical. To stretch the trapezius, sit comfortably in a chair with relaxed shoulders and your head in a neutral position. Trapezius is a large flat triangular sheet of muscle extending from the skull and spine medially to the shoulder girdle laterally. Head and shoulder model trapezius and rhomboids youtube. After over 10 successful years on the internet now an android app. Trapezius pars acromialis action retracts and adducts scapula. Trapezius pars spinalis, acromialis, and clavicularis location. Trapezius pars ascendens, pars horizontal, pars descendens 2.
Trapezius is one of the superficial posterior axioappendicular, or extrinsic muscle pairs. Trapezius definition of trapezius by medical dictionary. Trapezius pars acromialis o spinous process of c6t3. Download our english dictionary apps available for both ios and. Origin spinous processes of vertebrae t4 to t12 overlaps a small part of the latissimus dorsi insertion superior portion of the scapula the groove at the bottom of the inferior edge of the clavicle action sportactivity joint trapezius pars acromialis.
Trapezius muscle four parts the following information will be considered correct for purposes of exam questions for kin 334. Sep 23, 2008 this video was produced to help students of human anatomy at modesto junior college study our anatomical models. The aim of the study was to investigate the effectiveness of a resistancetraining program on muscle strength of the back and neckshoulder muscles, relative physical workload, muscle fatigue and musculoskeletal discomfort during a simulated assembly and lifting task. The muscle anatomy of the deltoid origin, insertion, action, innervation and vascular supply. In this first app more than 100 muscles of the human body are shown. It extends from the neck and chest part of the spine to the shoulder blades on both sides. The trapezius muscle is one of the largest muscle of the back, a muscle where many people hold their stress. The outside and center of the upper arm are located at the top of the muscle triangle, whereas the base is on the spine of the scapula and the acromion is. Mar 17, 2015 the trapezius muscle is a postural and active movement muscle, used to tilt and turn the head and neck, shrug, steady the shoulders, and twist the arms. Deltoid origin, insertion, action, innervation the.
Trapezius definition, a broad, flat muscle on each side of the upper and back part of the neck, shoulders, and back, the action of which raises, or rotates, or draws back the shoulders, and pulls the head backward or to one side. Trapezius pars clavicularis origin inferior edge of. Action laterally rotates, elevates and retracts scapula. Looking for online definition of trapezius in the medical dictionary. The trapezius see the diagram at the left is a large muscle located in the back, from the base of the head, to the end of the scapula, and then along the spine to almost the middle of the back. If scapula is fixed, extends and lat flexes neck insertion upper fibres to lat third of post border of clavicle. Trapezius pars acromialis origin spinous processes of vertebrae. The trapezius is one of the most important back muscles.
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