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Muscles upper body
Movers of the neck and shoulder
Question | Answer |
---|---|
what is the origin of latissimus dorsi? | spinous processes of last 6 thoracic vertebrae, last 3 or 4 ribs, thoracolumbar aponeurosis and post. iliac crest |
what is the insertion of latissmus dorsi? | crest of the lesser tubercle of the humerus |
what are the actions of latissimus dorsi? | -extend the shoulder-adduct the shoulder-medially rotate the shoulder |
what is the origin of levator scapula? | transverse processes of c1-c4 |
what is the insertion of levator scapula? | upper region of the medial border and superior angle of the scapula |
what are the acitons of levator scapula? | *Bi* extend the head and the neck*Uni* elevate the scapula downwardly rotate the scapula lat. flex the head and neck rotate the head and neck to the same side |
what is the origin of trapezius? | external occipital protuberance, medial portion of superior nuchal line of the occiput, ligamnetum nuchae and spinous processes of c7-t12 |
where does trapezius insert? | lat. 1/3 of clavicle, acromion, and spine of the scapula |
what are the actions of the upper traps? | *bi* extend the head and neck*uni* lat, flex the head and neck to the same side, rotate the head and neck to the oppposite side |
what are the actions of the mid traps? | adduct the scapulastabilize scapula |
what are the actions of the lower traps? | depress scapulaupwardly rotate scapula |
what is the origin of rhomboid major? | spinous processes of t2-t5 |
where does rhomboid major insert? | medial border of the scapula between the spine and the inferior angle |
what are the actions of rhomboid major and minor? | adduct, elevate, and downwardly rotate the scapula |
what is the origin of rhomboid minor? | spinous processes of c7-t1 |
where does rhomboid minor insert? | upper portion of medial border of the scapula, across from the spine |
what is the origin of pec. major? | medial half of the clavicle, sternum and cartialge of the 1st-6th ribs |
where does pec. major insert? | crest of the greater tubercle of the humerus |
what are the actions of pec. major? | adduct and medially rotate the shoulderassist in elevating the thorax |
what are the actions of pec. major? | flex and horizontally adduct the shoulderexend the shoulder |
what is the origin of the deltoid? | lat. 1/3 of the clavicle, accromion and spine of the scapula |
where does the deltoid insert? | deltoid tuberosity |
what are the actions of the deltoid? | abduct, flex, medially rotate, lat. rotate, extend, and horizontally adduct the shoulder |