Head and Neck Muscles Flashcards
Where is the masseter muscle located?
head, starts at zygomatic arch and extends to the mandibular angle
Where is the sternocleidomastoid (SMD) located?
head/neck, attached to manubrium of the sternum, the clavicle, and mastoid process of temporal bone,
What is the function of the masseter muscle?
elevation and protrusion of the mandible
What is the function of the sternocleidomastoid (SMD)?
flex neck both laterally and anteriorly, rotate head contralaterally to the side of contraction
Where is the temporalis loacted?
head, within temporal fossa of the skull, superior to the zygomatic arch
What is the function of the temporalis?
produce movement of the mandible at the temporomandibular joint, facilitate the act of mastication (chewing)
Where is the frontalis located?
head, from the eyebrows to the superior nuchal lines of the occipital bones
What is the function of the frontalis?
to elevate eyebrows, wrinkle forehead skin
Where is the orbicularis oris located?
head, surrounds orifice of mouth, forms majority of lips
What is the function of the orbicularis oris?
to control shape and movement of lips
