Trapezius, levator scapulae, rhomboids Flashcards
Origin of descending trapezius?
Occipital bone; spinous process of C1-C7
Insertino of descending trapezius?
lateral one-third of clavicle
Innervation of trapezius?
Accessory Nerve (CN XI) (C3-C4 of cervical plexus)
Action of descending trapezius?
Draws scapular obliquely upward
Rotates glenoid cavity superiorly
Tilts head to same side and rotates it to opposite
Origin of transverse trapezius?
Aponeurosis at T1-T4 spinous processes
Insertion of Transverse trapezius?
Acromion
Action of transverse trapezius?
Draws scapula medially
Origin of ascending trapezius?
Spinous process of T5-T12
Insertion of ascending trapezius?
Scapular spine
Action of ascending trapezius?
Draws scapula medially downward
Action of ENTIRE trapezius muscle?
Steadies scapula on thorax
Origin of Levator scapulae?
Transverse process of C1-C4
Insertion of levator scapulae?
Scapular (superior angle)
Innervation of levator scapulae, rhomboid minor, rhomboid major?
Dorsal scapular nerve
C4-C5
Action of levator scapulae?
Draws scapula medially upward while moving inferior angle medially
Inclines neck to same side
Origin of rhomboid minor?
Spinous processes
C7, T1
Insertion of rhomboid minor?
Medial border of scapula, at/superior to spine of scapula
Action of rhomboids major/minor?
Steadies scapula
Draws scapula medially upward
Origin of rhomboid major?
SPinous process of T2-T5
Insertion of rhomboid major?
Medial border of scapula, below scapular spine
3 parts of trapezius?
Ascending, descending, transverse
