Shoulder joint Flashcards
origins, insertions, actions
What is the origin of the upper trapezius?
Occipital bone of lower
Nuchal ligament on upper cervical spinous process
What is the insertion of the upper trapezius?
Outter third of clavicle
Acromion process
What is the action of the upper trapezius?
Scapular elevation
Upward rotation
What is the origin of the middle trapezius?
Spinous processes of C7-T3
What is the insertion of the middle trapezius?
Scapular spine
What is the action of the middle trapezius?
Scapular retraction
What is the origin of the lavetor scapula?
Transverse processes of first 4 cervicle vertabra
What is the insertion of the lavetor scapula?
Vertebral border of the scapula between superior angle and spine
What is the action of the lavetor scapula?
Scapular elevation
Downward rotation
What is the origin of the Rhomboids?
Spinous processes of C7-T5
What is the insertion of the rhomboids?
Vertebral border of scapula between the inferior angle and spine.
What is the action of the rhomboids?
Scapular retraction
Elevation
Downward rotation
What is the origin of the serratus anterior?
Lateral surface of the upper 8 ribs
What is the insertion of serratus anterior?
Vertebral border of the scapula
Anterior surface
What is the action of the serratus anterior?
Scapular protraction
Upward rotation