Muscles of the Neck that Move the Head Flashcards
The head is attached to the vertebral column at which joint?
atlanto occipital joint
What are suboccipital muscles?
deep muscles in the back of the neck attached between the occipital bone and C1+C2 vertebrae
What muscle group stabilizes the AOJ and AAJ?
suboccipital
The balance and movement of the head involve the action of neck muscles acting:
together bilaterally
What muscles are involved in the balance and movements of the head?
SCM, semispinalis capitis, splenius capitis, longissimus capitis, and spinalis capitis
What is the origin of the SCM?
manubrium of sternum and medial 1/3 of clavicle
What is the insertion of the SCM
mastoid process and superior nuchal line
What are the actions of SCM?
flex head, ext head, elevate ribs in forced inhalation, lat flex of head, rotation of head
What is the origin of the semispinalis capitis?
C4-T7
What is the insertion of the semispinalis capitis?
occipital bone
What are the actions of the semispinalis capitis?
ext of head, rotation of head
What is the most superficially located muscle that helps the balance and movements of the head?
splenius capitis
What is the origin of the splenius capitis?
ligamentum nuchae and SP of C7-T4
What is the insertion of the splenius capitis?
occipital bone and mastoid process
The splenius capitis acts as an:
extensor muscle
