Shoulder Girdle Flashcards
Rhomboids-major &minor
Origin- spinous processes of 7th cervical and thoracic 1-5
Insertion- medial border of scapula from the base of the spine to the inferior angle
Actions- adduction of scapula, downward rotation, elevation
3 joints of shoulder girdle
- Sterno-clavicular (sc)
- Acromio-clavicular (ac)
- Scapulo-thoracic (st)
Levator scapulae
Origin- transverse processes of c1-c4
Insertion- medial border of scapula from the base of the spine to the superior angle
Action- elevation, downward rotation
Trapezius upper
Origin- external occipital protuberance
Insertion- dorsal lateral 1/3 of clavicle
Action- cervical extension, lateral extension, scapular elevation & upward rotation
Trapezius middle
Origin- dorsal spines c7-t4
Insertion- acromion process and spine of scapula
Actions- adduction, upward rotation & elevation
Trapezius lower
Origin- dorsal spines of t4-t12
Insertion- acromion process and spine of scapula
Actions- depression, adduction, and upward rotation
Serratus anterior
Origin- outer surface of upper 9 ribs
Insertion- anterior surface of medial border
Action- abduction, upward rotation
Pec minor
Origin-Anterior surface of 3-5 ribs
Insertion- coracoid process of scapula
Action- abduction, downward rotation, depression
Subclavius
Origin- superior aspect of 1st rib at junction with costal cartilage
Insertion- inferior groove in mid-portion of clavicle
Action- stabilization and protection of sternoclavicular joint, depression and abduction
Elevation
Levator scapulae
Trapezius (upper, mid)
Depression
Lower trapezius
Pec minor
Subclavius
Upward rotation
Serratus anterior
Trapezius
Downward rotation
Rhomboid major & minor
- levator scapula
- pec minor
Retraction (adduction)
Rhomboid major and minor
Trapezius (mid & lower)
