What is the origin and insertion of the zygomaticus muscle?
Zygomaticus major is a thin paired facial muscle that extends diagonally from the zygomatic bone (hence the name) to the angle of the mouth….Zygomaticus major muscle.
| Origin | (Posterior part of) Lateral aspect of zygomatic bone |
|---|---|
| Insertion | Modiolus, blends with muscles of upper lip |
| Function | Elevates and everts angle of mouth |
What is the action of the Zygomaticus minor muscle?
In the array of their respective actions, zygomaticus minor elevates the upper lip, thus exposing the maxillary teeth. The function of this movement is to facilitate speech, as well as to enable various facial expressions, such as smiling.
What action does the zygomaticus perform?
Function. The zygomaticus major muscle raises the corners of the mouth and draws them posteriorly when a person smiles.
How do you activate zygomaticus minor?
This exercise targets the muscle that helps to protrude the lower lip and inferiorly draw it in. Stick the lower lip out and draw it into a pout position. Hold for five seconds before relaxing. Repeat the exercise a total of 10 times.
What is the origin insertion and action of the orbicularis oris?
Orbicularis oris muscle
| Origin | Medial aspects of maxilla and mandible, perioral skin and muscles, modiolus |
|---|---|
| Insertion | Skin and mucous membrane of lips |
| Action | Closes mouth, compresses and protrudes lips |
| Innervation | Buccal branch of facial nerve (CN VII) |
What is the origin and insertion of the masseter muscle?
The masseter is one of the muscles of mastication. It is a powerful superficial quadrangular muscle originating from the zygomatic arch and inserts along the angle and lateral surface of the mandibular ramus. The masseter is primarily responsible for the elevation of the mandible and some protraction of the mandible.
What is the origin and insertion of the risorius?
Risorius is a slender and narrow facial muscle that belongs to the buccolabial group of muscles….Risorius muscle.
| Origin | Parotid fascia, Buccal skin, zygomatic bone (variable) |
|---|---|
| Insertion | Modiolus |
| Function | Extends angle of mouth laterally |
What is the origin and insertion of the levator labii superioris?
Levator labii superioris is a short, paired triangular muscle of the face….Levator labii superioris muscle.
| Origin | Zygomatic process of maxilla, maxillary process of zygomatic bone |
|---|---|
| Insertion | Blends with muscles of upper lip |
What is the function of the Zygomaticus muscle?
The zygomaticus major muscle is a muscle that controls facial expression, drawing the mouth’s angle upward and outward.
What is the origin and insertion of the levator Labii Superioris?
What is the action of masseter muscle?
The action of the muscle during bilateral contraction of the entire muscle is to elevate the mandible, raising the lower jaw. Elevation of the mandible occurs during the closing of the jaws. The masseter parallels the medial pterygoid muscle, but it is stronger and superficial fibres can cause protrusion.
Where does the zygomaticus minor originate and insert?
Zygomaticus minor muscle detail – origin, insertion and exercises. The zygomaticus minor is a muscle of facial expression. It originates from zygomatic bone and continues with orbicularis oculi on the lateral face of the levator labii superioris and then inserts into the outer part of the upper lip.
What is the function of the zygomaticus muscle?
These muscles form the structure and carry out the functions of the cheeks and lips. The main action of zygomaticus major is to pull the angle of the mouth superolaterally. In coordination with other buccolabial muscles, it facilitates speech and creates facial expressions.
What nerve innervates the zygomaticus minor?
Zygomaticus minor is innervated by the zygomatic and buccal branches of facial nerve (CN VII). Vascular supply to zygomaticus minor comes from the superior labial branch of facial artery. Zygomaticus minor is a direct tractor of the upper lip, together with levator labii superioris alaeque nasi and levator labii superioris.
What does the zygomaticus minor do in Bell’s palsy?
Upon activation the zygomaticus minor pulls the upper lip backward, upward and outward, and also aids in deepening and elevating the nasolabial sulcus. In Bell’s palsy zygomaticus minor muscle paralysis .