Anatomy and actions of the trapezius muscle pdf file

Figures below are from hamilton and luttgens, page 102. Reach back with one hand and find your trapezius muscle. Its base is found across the spinal cord origin of the muscle and its top is located at the upper part of the shoulder insertion1 the trapezius muscle appears with a long origin from the skeleton that concludes the base of the cranium and the vertebras from c1 to t12 fig. The upper fibers, the middle fibers, called the middle trapezius, and the lower fibers, which are called, you guessed it, the lower traps. Anatomy of the trapezius muscle everything you need to. Results shoulders with stronger upper trapezius muscles showed. The part of the muscle which arises from the lowest halfdozen thoracic spines is inserted by a narrow recurved tendon into the medial end of the spine. The essentially transverse orientation of the upper and middle fibres of trapezius precludes any action as elevators of the scapula as commonly depicted.

The trapezius is a flat, triangular muscle, covering the upper and back part of the neck and shoulders. Pdf anatomy, head and neck, sternocleidomastoid muscle. Pdf purpose this study aimed to investigate the effect of trapezius muscle. What is often overlooked by the amateur, however, is the complete anatomy of the trapezius muscle.

The three types of muscle include skeletal, cardiac, and smooth. Its thoracic fibres converged to the deltoid tubercle of the scapula. Learn vocabulary, terms, and more with flashcards, games, and other study tools. A very wide, triangular muscle that covers almost all the other muscles of the nape of the neck and a large part of the back. Anatomy and actions of the trapezius muscle ifast university. The division into the separate, distinct parts of this muscle is about functionality. Myofascial trigger points mtrps are hyperirritable spots located in taut bands of muscle fibres. The patient was placed in the semilateral transfer. The pectoralis major is a fanshaped muscle on the chest. Skeletal muscles are attached to bones and held in position by a. Trapezius muscle, large, superficial muscle at the back of the neck and the upper part of the thorax, or chest. You can also apply some pressure to the area along your shoulders and between the shoulder blades.

The upper limb upper extremity is truly a complex part of human anatomy. Anatomy, back, trapezius statpearls ncbi bookshelf. Trapezius muscle simple english wikipedia, the free. By looking at all of the upper limbs components separately we can appreciate and compartmentalize the information, then later view the upper limb as a whole and understand how all of its parts work in unison. When viewed together, the two trapezius muscles together roughly form a diamond or trapezoid shape, responsible for the trapezius name. It is best studied broken down into its components. Quantitative anatomy of the trapezius muscle in the human fetus article pdf available in advances in clinical and experimental medicine 254. Theoretically, a sensitive spot may be found anywhere in the skeletal muscle but is usually found near the. Anatomical basis of the myofascial trigger points of the.

We had one female patient and seven male decubitus position with head turned to the opposite side. The action vector of the muscle is not similar to the infraspinatus and the gain of. The upper fibers elevate the acromion, the lower depress the medial end of the scapular spine. A line connecting the junction between the upper third and the lower twothirds of the posterior border of the sternocleidomastoid to a point two fingers breadths 5cm above the clavicle on. Broadly considered, human musclelike the muscles of all vertebratesis often divided into striated muscle, smooth muscle, and cardiac muscle. Anatomy the trapezius muscle is a superficial posterior muscle that is largely responsible for elevating the scapula. Human muscle system, the muscles of the human body that work the skeletal system, that are under voluntary control, and that are concerned with movement, posture, and balance. An example of trapezius function is an overhead press. The trapezius is a large paired surface muscle that extends longitudinally from the occipital bone to the lower thoracic vertebrae of the spine and laterally to the spine of the scapula.

External occipital protuberance, nuchal ligament, and spinous processes of 7th cervical and all thoracic vertebrae. The actions of the trapezius are rotation, retraction, elevation, and depression movements of scapula, and support of the arm 5. The trapezius is the only muscle in the body whose name arises from the combined left and right muscles. The trapezius muscle may be best known as a source of stiffness across the top of the shoulders. By deter little atention is paid to the morphology of trapezius mining the fascicular anatomy of the trapezius and by and its lines of action in the biomechanics literature.

This lesson will provide all types of information about this muscle, including its. This episode discusses the trapezius muscle and gives. Medial superior nuchal line and external protuberance of occipital bone, ligamentum nuchae and spinous process of c7t12. However, the trapezius, which covers a broad area of the back of your neck and upper back, serves multiple functions. Trigger points in the trapezius can be particularly nasty and part of the headaches that are so common. Pdf efect of trapezius muscle strength on threedimensional.

Its functions are to move the scapulae and support the arm. It originates at the occipital bone at the base of the skull, the ligaments on either side of the seven cervical neck vertebrae ligamentum nuchae, and the seventh cervical and all thoracic. The trapezius is a large superficial muscle that extends from the occipital bone to the lower thoracic vertebrae and to the spine of the scapula. The superficial back muscles consist of the trapezius, levator scapulae, rhomboid major, rhomboid minor, and latissimus dorsi muscles figure 11a. Include sketch of muscle location in the box provided.

Its not uncommon for the upper trapezius to be involved in headaches and torticollis wry neckwaking up with a stiff neck. The trapezius muscle is also responsible for upward rotation of the scapula, along with the serratus anterior muscle. They are a goal for those less experienced, as one is perceived as being big with developed traps. Reflection of the right trapezius muscle showing the entry points of the spinal accessory nerve branches that coincide with the mtps 1, 2, 3, 3. External occipital protuberance, medial third of the superior nuchal line, the nuchal ligament, and the spinous process of c7. At the same time, this proper scapular orientation enables proper function and. Human anatomy and physiology i laboratory gross anatomy of the muscular system two weeks this lab involves study of the laboratory exercise gross anatomy of the muscular system.

It frequently becomes tight and contracted if you sit for long hours at a desk. It moves the scapula and supports the arm the trapezius has three functional parts. Pilates to correct overactive upper trapezius muscles and. Dissection of the trapezius muscle and the areas corresponding to the clinical trigger points. This is amongst the last of the muscle anatomy series episodes and despite it coming to an end, the videos will definitely keep on coming. Superior nuchal line of the occipital bone, external occipital protuberance, ligamentum nuchae and spinous processes of c7 to t12. The trapezius muscle is a large, broad superficial muscle of the posterior neck and back. Myofascial trigger points and innervation zone locations. Electrophysiological studies indicate that abnormal electrical activity is detectable near mtrps. Trapezius muscle anatomy anatomy note anatomy is a. Bakersfield college spring, 2005 anatomy i muscle anatomy 1 muscle origin insertion action trapezius occipital bone, vertebrae filename. The trapezius is a large paired surface muscle that extends longitudinally from the occipital. Trapezius muscle four parts the following information will be considered correct for purposes of exam questions for kin 334. It arises from the external occipital protuberance and the medial third of the superior nuchal line of the occipital bone, from the ligamentum nuchae, the spinous process of the seventh cervical, and the spinous processes of all the thoracic.

Trapezius muscle transfer for external shoulder rotation. Well defined upper traps are often the trademark for anyone seriously involved in resistance training. Trapezius muscle is a large superficial muscle that extends from the back of. Contracting the upper trapezius on just one side will tilt the head to that side while rotating it in the opposite direction. Do not memorize the origins, insertions and actions for this muscle in thompson and floyd since they list only three parts of the trapezius. This allows us to raise our arm above our heads passed the level of the shoulder.

Muscles of back lab do both sides 1 midline incision along spines 2 extend out as flaps 3 in neck just see trapezius skip. It will either move the scapula or stabilize the scapula. The muscular system skeletal muscle tissue and organization. The sternocleidomastoid muscle scm is one of more than 20 pairs of muscles that act on the neck. Educational video describing anatomy associated with the trapezius muscle. The middle portion of the muscle retracts the shoulder blade, pulling it closer to the spine. If the shoulders are fixed, the upper trapezius muscles extend the neck, tilting the head up.

Trapezius is one of the superficial posterior axioappendicular, or extrinsic muscle pairs. Muscle notes 3 the trapezius is a large superficial. Muscle name origin insertion action innervation muscles of. The throwing action is a common manoeuvre in which the trapezius muscle is active, along with the deltoid muscle and the rotator cuff muscles. Tubercles at the apex of the scapular spine actions. Pdf quantitative anatomy of the trapezius muscle in the. This phenomenon has been described as endplate noise and it has been purported to be associated mtrp pathophysiology. The trapezius muscle is one of the largest muscle of the back, a muscle where many people hold their stress. Thus, it is suggested that mtrps will be overlap the innervation zone iz. Beginning at the base of the neck, try to knead the trapezius muscles. Along with sternocleidomastoid muscle, it is invested by the superficial layer of the deep cervical fascia, which splits around it.

Although these muscles are located in the back, they are considered to be muscles of the upper limbs because they connect the upper limbs to the trunk and assist in upper limb movements via the scapula and humerus. The trapezius is innervated partially by cranial nerve xi, which is the spinal accessory nerve, and the traps are also innervated by the nerve roots of c3 and c4. By myprotein writer callum loundes the trapezius muscle is one of the largest muscles on the back. Anatomy and actions of the trapezius muscle sciencedirect. Rather the action of these fibres is to draw the scapula and clavicle backwards or to raise the scapula by rotating the clavicle about the sternoclavicular joint. Mtrps, or muscle knots, are a type of electrically active, hyperirritable areas of muscle associated with contractile nodules and dysfunctional motor endplates.

Whilst the upper portion of the trapezius, or traps, adds overall roundness to a physiques frame, the middle and lower portion of the traps contribute massively to thickness of the back the back is only considered to be completely developed when one has achieved both width and thickness. If there is an area that is more tender, apply pressure for ten seconds and then release so that the muscle can relax. Fibres from c 7 and t 1 passed transversely to reach the acromion and spine of the scapula. Fibres from c7 and t1 passed transversely to reach the acromion and spine of the scapula. Muscle anatomy insertion origin free pdf file sharing. The trapezius muscle is a flat triangularly shaped muscle. In human, trapezius muscle or trapezius is a large muscle that extends longitudinally on the upper portion of a human spine.

Its occipital and nuchal fibres passed downwards but mainly transversely to insert into the clavicle. Spinal accessory nerve cranial nerve xi the ventral rami of spinal nerves c2, c3, c4. We are pleased to provide you with the picture named trapezius muscle anatomy. Review of the literature on anatomical variations of the trapezius. The sternocleidomastoid and the trapezius muscles and the middle part of the clavicle form the boundaries of the posterior triangle. The trapezius muscle is a large superficial back muscle that resembles a trapezoid. We hope this picture trapezius muscle anatomy can help you study and research. For example, the biceps brachii muscle is said to perform. Lateral third of the clavicle and the medial aspect of the acromion process of the scapula. The trapezius muscle is a large, paired, triangular shaped muscle located superficially in the back of the neck and thorax. Dissection studies revealed the fascicular anatomy of the trapezius. Myofascial trigger points are considered to represent a pathogenic model of pain from diverse etiologies. Muscle terminology muscle actions there are two methods of describing actions. Anatomical terms o muscle eedit on wikidata in human anatomy, the trapezius t r.