Verterbral column and superficial back Flashcards
What is the origin of levator scapulae?
Transverse process of C1-C4
innervation of levator scapulae
dorsal scapular nerve (C4-C5)
action of levator scapulae
elevates the scapula
What is the insertion of levator scapulae?
superior part of the medial border of the scapula
origin of trapezius (descending)
external occipital protuberance, spinous processes of C1-C7
origin of trapezius (transverse)
aponeurosis at T1-T4 spinous processes
origin of trapezius (ascending)
spinous process T5-T12
insertion of trapezius (descending)
clavicle (lateral 1/3)
insertion of trapezius (transverse)
acromion
insertion of trapezius (ascending)
scapular spine
innervation of trapezius
Accessory n., C3-C4 of cervical plexus
action of trapezius
descending - draws scap up, rotates glenoid cavity superiorly, tilts head same side, rotates it opposite side
transverse - draws scap medially
ascending - draws scap medially downward
origin of latissimus dorsi (vertebral)
spinous process of T7-T12; thoracolumbar fascia
origin of latissimus dorsi (scapular)
scapula (inferior angle)
origin of latissimus dorsi (costal)
9th to 12th ribs
origin of latissimus dorsi (iliac)
iliac crest (posterior 1/3)
insertion of latissimus dorsi
floor of the intertubercular sulcus of the humerus
innervation of latissimus dorsi
thoracodorsal n. (C6-C8) “6 to 8, lats are great”
action of latissimus dorsi
handcuff: internal rotation, adduction, extension, respiration (cough muscle)
origin of rhomboid minor
C7-T1 spinous process
origin of rhomboid major
T2-T5 spinous processes
insertion of rhomboids
medial border of scapula above (minor) and below (major) scapular spine
innervation of rhomboids
dorsal scapular n. (C4-C5)
actions of rhomboids
minor - draws scap medially upward while moving inferior angle medially
major - steadies scapula; draws scap medially upward