Second 3 muscles Flashcards
Transverse process of upper 4 cervical vertebrae
Levator Scapulae Origin
Vertebral/Medial border of the scapula from its superior angle to its spine
Levator Scapulae Insertion
Elevation of the scapula
Levator Scapulae Action
Dorsal Scapular Nerve (C5) C3, C4
Levator Scapulae Innervation
Sternal head: anterior surface of the manubrium
Sternocleidomastoideus Origin
Superior border of the medial one third of the clavicle
Sternocleidomastoideus Origin
Mastoid process of the temporal bone
Sternocleidomastoideus Insertion
Lateral ½ of the superior nuchal line
Sternocleidomastoideus Insertion
Draws the mastoid process down toward the same side which causes the chin to turn up toward the opposite side
Sternocleidomastoideus Action
Function together, they flex the neck
Sternocleidomastoideus Action
Working individually, they can rotate the head to the opposite side and flex it laterally to the same side
Sternocleidomastoideus Action
Spinal Accessory Nerve, branches C2 and C3
Sternocleidomastoideus Innervation
Digitations from the upper 8 ribs about midway between their angles and costal cartilages
Ribs 1-8 or 9
Serratus Anterior Origin
Entire length of the vertebral border of the scapula and costal surface
Serratus Anterior Insertion
Abduction of the scapula beginning at inferior angle
Serratus Anterior Action