What is the origin and insertion of orbicularis oris?

What is the origin and insertion of orbicularis oris?

Orbicularis oris is a complex circular muscle that surrounds the orifice of the mouth and forms the majority of the lips….Orbicularis oris muscle.

Origin Medial aspects of maxilla and mandible, perioral skin and muscles, modiolus
Insertion Skin and mucous membrane of lips

Is the zygomatic bone the insertion or origin of this 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 muscles origin is the zygomatic arch?

Surgical anatomy The function of the zygomatic arch is protection of the eye, origin for the masseter and part of the temporal muscles, and to provide an articulation for the mandible. The zygomatic arch is approached by an incision made along its ventral border (Fig. 55.5).

What is the name of the muscle that originates at the zygomatic bone and inserts at the skin on the corners of the mouth?

zygomaticus major muscle
Structure. The zygomaticus major muscle originates from the upper margin of the temporal process, part of the lateral surface of the zygomatic bone. It inserts into tissue at the corner of the mouth.

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 levator Labii Superioris?

levatores labii superioris, also called quadratus labii superioris, pl. quadrati labii superioris) is a muscle of the human body used in facial expression….

Levator labii superioris
Origin Medial infra-orbital margin
Insertion Skin and muscle of the upper lip (labii superioris)
Artery facial artery

What is the origin insertion and action of the Zygomaticus minor?

Zygomaticus minor muscle

Origin (Anterior part of) Lateral aspect of zygomatic bone
Insertion Blends with muscles of upper lip (medial to zygomaticus major muscle)
Action Elevates upper lip, exposes maxillary teeth
Innervation Zygomatic and buccal branches of facial nerve (CN VII)

What are the origins and insertions for the masseter and the temporalis quizlet?

What are the origins and insertions for the masseter and the temporalis? Temporalis elevates and retracts the mandible against the maxilla with great force. The masseter raises the mandible against the maxillae with great force.

Which of the following has its origin in the manubrium of the sternum and inserts into the thyroid cartilage?

Sternothyroid muscle
Origin Manubrium
Insertion Thyroid cartilage
Artery Superior thyroid artery
Nerve Ansa cervicalis

Which muscle has an origin on the occipital bone and an insertion on the spine of the scapula?

The trapezius
The trapezius has multiple origin and insertion points—it’s simply too big not to. It originates on the occipital bone, the ligamentum nuchae, and the spinous processes of T01–T12. The trapezius inserts on the lateral third of the clavicle, as well as the acromion and scapular spine of the scapula.

What is the origin of the masseter?

Masseter muscle

Origin zygomatic arch and maxillary process of zygomatic bone
Insertion Angle and lateral surface of ramus of mandible, coronoid process
Artery masseteric artery
Nerve mandibular nerve (V3)

What is the origin of the depressor Anguli Oris and the depressor Labii Inferioris muscles?

The depressor anguli oris muscle (triangularis muscle) is a facial muscle. It originates from the mandible and inserts into the angle of the mouth….Depressor anguli oris muscle.

Depressor anguli oris
Origin tubercle of mandible
Insertion modiolus of mouth
Artery facial artery
Nerve marginal mandibular branch of the facial nerve

Where are the muscles of the zygomaticus minor located?

The muscle inserts medial to the zygomaticus major muscle by blending with the muscles of the upper lip; levator labii superioris and orbicularis oris. Zygomaticus minor lies deep to the subcutaneous fat of the face and superficial to the levator anguli oris muscle.

What are the functions of the orbicularis oris muscle?

Orbicularis oris muscle 1 Structure. Orbicularis oris is a composite muscle that consists of two parts; a larger peripheral part, and a smaller marginal part. 2 Origin and insertion. 3 Relations. 4 Innervation. 5 Blood supply. 6 Function.

Where does the zygomaticus major artery run?

Zygomaticus major courses diagonally over the anterior surfaces of the buccinator and masseter muscles. The facial artery and its accompanying vein run between the buccinator and zygomaticus major muscles.

Is the buccinator superficial to the orbicularis oris?

Superficial to the buccinator is the risorius muscle which extends horizontally and blends with the lateral edge of the orbicularis oris. This sure sounds like a lot of muscles, but wait until you hear there are about 600 more muscles in the human body!