Unit 2.3 Flashcards
Muscles of facial expression are _ and act on
Superficial
Act on the skin and orifices of the face
Muscles facial expression insert into the
Superficial fascia of the skin and guard entrances
The large muscles of facial expression
The frontalis in occipitalis, which is sometimes referred to as the occipitofrontalis
The frontalis moves
the occipitalis moves
The scalp anteriorly and wrinkles are forehead. This action is termed protraction.
Moves the scout poster. This action can be termed retraction.
The procerus and and corrugator supercilii
Muscles that act on our brow ridge
The procerus wrinkles the nose and skin below the bridge of the nose
corrugator supercilii furrow the brows and wrinkles the skin superior the bridge of the nose
Orbicularis oculi
The facial muscle associated with closing the eye winking and blinking
Levator palpebral superioris
The facial muscle that functions to open our upper eyelid
Facial muscles that elevate the lips
Levator labi superioris, zygomaticus, major and zygomaticus minor, and risorius
The facial muscles that depress the lips
Depressor labi inferioris and depressor anguli oris
The muscles that purse, our lips or close our mouth
Orbicularis oris
Buccinator
The facial muscle that draws our cheeks together
Muscles of mastification are _ and generally
Muscles that function while chewing
Larger and deeper than those of facial expressions
Muscles of mastification action
Open and close (elevate) the jaw
Muscles of mastication that close the jaw
Temporalis, masseter, and medial pterygoid
The medial and lateral pterygoid muscles action
Location
Shift the jaw side to side and the medial closes the jaw
Deep muscles
Diagastric action
Only muscle of mastication that opens the jaw
Muscles involved with mastication
Includes
Muscles that aid in the position or movement of food for or during the process of mastication
Muscles of the tongue, throat (pharyngeal constrictors), and many of the infrahyoids
Diagstric, orbicularis oris, de Bucaneer, the glossal muscles, internal and unseen, pharyngeal muscles
Muscles of mastication are
Temporalis, mass setter, digastric, medial and lateral pterygoids
The muscles of the neck act to
These muscles will originate on
Position the head
Pectoral girdle, thorax, or the vertebral column and inserts on the skull and cervical vertebrae
The sternocleidomastoid muscles are _ on the surface of the neck
Bilateral contraction, both right and left produces
Unilateral contraction, right or left will cause
Origin
Insertion
Anterior
Flexion of the neck
Rotation of the head to the opposite side and lateral flexion of the neck
Sternum and clavicle
Mastoid process of the temporal bone
Muscles of the neck
Digastric, supra and infrahyoid, muscles, trapezius, splenius capitis, sternocleidomastoid
Roots of words
First root is always the origin
Binomial- second root is the insertion
Trinomial-second root is the origin and the third is the insertion
