Muscles Acting On The Head Flashcards
1
Q
Sternocleidomastoid
A
O: sternum, clavicle
I: mastoid process of temporal bone
I: abducts, rotates, and flexes head
N: accessory nerve (XI), spinal nerves C2-3
2
Q
Scalenes (anterior, middle, posterior)
A
O: transverse process of all cervical vertebrae
I: ribs 1 and 2
A: flexes and rotates neck, elevates ribs 1-2
N: spinal nerves C3-8
3
Q
Trapezius
A
O: posterior occipital bone Nuchal ligament, C7-T4
I: clavicle, aromion, spine of scapula
A: extends and abducts head, rotates and adducts scapula, fixes scapula
N: Accessory nerve (XI), spinal nerves C2-4
4
Q
Temporoparietalis
A
O: fascia around external ear
I: epicranisl aponeurosis
A: tenses scalp, moves auricle of ear
N: facial nerve VII
