TG Ch 5
This strong muscle is located at the center of the cheek & tightens the corner of the lip as well as presses the cheek firmly against the teeth.
Buccinator
This muscle creates a look of surprise by eleveating the eyebrows
Frontalis fibers of the Occipitofrontalis
Which 3 muscles protract the mandible?
Lateral Pterygoid, Medial Pterygoid, & Masseter
If this muscle is mildly contracted unilaterally, it will produce an "Elvis-like" lip curl.
Levator Labii Superioris
Which 3 muscles elevate the mandible?
Maseter, Temporalis, & Medial Pterygoid
This is the most medial muscle of the chin; this muscle elevates the skin of the chin & protudes the lower lip (pout)
Mentalis
This sphincter muscle encircles the eye
Orbicularis Oculi
This strong sphincter muscle encircles the mouth
Orbicularis Oris
This muscle is a thin, superficial sheath spanning the neck from the fascia of the superior pectoralis major to the base of the mandible. It depresses the mandible but is often classified as a muscle of Facial Expression?
Platysma
This is the small triangular muscle located on the forehead that wrinkles the skin of the nose & draws the skin down between the eyebrows
Procerus
Although the name in Latin means "to laugh," this muscle retracts the corner of the mouth laterally and forms an insincere smile.
Risorius
What 4 muscles in the lateral compartment of the neck unilaterally rotate the neck to the opposite side?
SCM & all 3 scalene (anterior, middle, & posterior)
What 4 muscles (when used bilaterally) flex the neck?
SCM, anterior scalene, longus capitis, & longus colli
What muscle originates on the temporal fossa and fascia?
Temporalis
Which 2 muscles retract the mandible?
Temporalis & Digastric
What are the seven primary facial expression?
anger, contempt, disgust, fear, happiness, sadness, and surprise
Which muscles insert onto the first rib?
anterior and middle scalenes
if you palpate medial to the SCM at the level of the hyoid bone, you can feel the pulse originating from this structure of the neck
common carotid artery
Which muscle with two bellies originates at the mastoid process, loops through a tendinous sling at the hyoid bone and inserts onto the inferior border of the mandible?
digastric
What are the four suprahyoid muscles?
digastric, geniohyoid, mylohyoid, & stylohyoid
What forms the bridge between the frontalis and occipitalis muscle bellies to connect the Occipitofrontalis muscle?
galea aponeurotica
Where are the suprahyoid muscles located?
inferior to the mandible & superior to the hyoid bone in the anterior compartment of the neck
What two muscles of the anterior neck help unilaterally rotate the neck to the same side?
longus capitis & longus colli
What 6 muscles of the anterior & lateral compartments of the neck unilaterally move the cervical spine into lateral flexion on the same side?
longus capitis, longus colli, SCM & all 3 scalene (anterior, middle, & posterior)
Where does the masseter originate & insert?
originates at the zygomatic arch & inserts onto the angle and ramus of the mandible
Which scalene is difficult to distinguish from the surrounding muslce bellies?
posterior
Which muscle inserts onto the second rib?
posterior scalenes
These three muscles assist in respiratory inhalation
scalenes
What joint is the most frequently used in the body?
temporomandibular joint (moves 2-3K x per day)
Where do all of the scalenes originate?
transverse processes of various cervical vertebrae