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 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 |
What is the insertion of the biceps Brachii?
The biceps brachii muscle is one of the chief muscles of the arm. The origin at the scapula and the insertion into the radius of the biceps brachii means it can act on both the shoulder joint and the elbow joint, which is why this muscle participates in a few movements of the arm.
What is the origin insertion and action of temporalis?
Temporal muscle
| Origin | Temporal fossa (up to inferior temporal line), Temporal fascia |
|---|---|
| Insertion | Apex and medial surface of coronoid process of mandible |
| Action | Anterior fibres: Elevates mandible Posterior part: Retracts mandible |
| Innervation | Deep temporal branches (of mandibular nerve (CN V3)) |
Which muscle inserts at the orbicularis oris?
The levator labii superioris muscle originates beneath the orbicularis oculi muscle and inserts over and intermingles with the orbicularis oris muscle into the lower half of the philtral column. These muscles assist the orbicularis oris but may be transected without compromising oral competence.
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 levator Anguli Oris?
Its fibers are inserted into the angle of the mouth, intermingling with those of the zygomaticus, triangularis, and orbicularis oris….
| Levator anguli oris | |
|---|---|
| Origin | Maxilla |
| Insertion | Modiolus |
| Artery | Facial artery |
| Nerve | Buccal branches of the facial nerve |