export_head and neck origins insertions 1 Flashcards
Platysma origin
superficial fascia
Platysma insertion
mandible
Platysma action
Stretches neck skin tight
Platysma innervation
facial nerve, cervical branch
SCM origin
manubrium and clavicle
SCM insertion
mastoid process, superior nuchal line (lateral half)
SCM Action
draws head to shoulder, turns face to opposite side
SCM innervation
spinal accessory, APR of C2, C3
Trapezius origin
thoracic, cervical spines, ligamentum nuchae, inion, nuchal line
Trapezius insertion
spine, acromion of scapula
Trapezius action
extends head, tilts chin to opposite side; rotates, adducts scapula; elevates scapula and clavicle
Trapezius innervation
spinal accessory, APR of C3, C4
Splenius capitis origin
ligament; cervical spines
Splenius capitus insertion
mastoid process; superior nuchal line
Splenius capitus action
extends head; flexes head laterally; rotates head ipsilateral side
