What are the 4 muscles of mastication?
Muscles
- Temporalis Muscle.
- Medial Pterygoid.
- Lateral Pterygoid.
- Masseter.
- Accessory Muscles of Mastication.
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.
Where does mastication muscle insert?
mandible
The muscles of mastication originate on the skull and insert into the mandible, thereby allowing for jaw movements during contraction. Each of these primary muscles of mastication is paired, with each side of the mandible possessing one of the four.
What are the main muscle of mastication give origin insertion and nerve supply?
The innervation of the masseter muscle stems from the masseteric nerve, a branch of the mandibular nerve. Its blood supply is derived from the masseteric artery, which emerges from the maxillary artery.
Where is the origin of the sternocleidomastoid?
manubrium
Sternocleidomastoid Attachments It originates on the anterior surface of the manubrium, and the superior border and anterior surface of the medial third of the clavicle. The SCM converges into one point and inserts on the lateral surface of the mastoid process and the nuchal line of the occipital bone.
Which muscles insert on the mandible?
Muscles Inserting on the Mandible
- Platysma – inserts on the inferior border of the mandible.
- Superficial masseter – inserts on the lateral surface of the ramus and angle of the mandible.
- Deep masseter – inserts on the lateral surface of the ramus and angle of the mandible.
What is the origin of the masseter?
Masseter muscle
| Masseter | |
|---|---|
| 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 insertion of the masseter?
Ramus of the mandible
Masseter muscle/Insertions
What is the origin of the highlighted muscle?
Describe the action of the highlighted muscle. Name the highlighted muscle, which originates at the medial clavicle and the manubrium of the sternum. This muscle works synergistically with latissimus dorsi.
What are the three main muscles involved in mastication?
The primary muscles include: Masseter. Temporalis. Lateral pterygoid.
What is the insertion of Sternocleidomastoid?
Sternocleidomastoid Attachments
| Origin | Insertion |
|---|---|
| Upper part of the anterior surface of manubrium | Lateral surface of mastoid process |
| Superior border/anterior surface of medial third of clavicle | Nuchal line of occipital bone |
What is the origin and insertion of Sternocleidomastoid?
The sternocleidomastoid muscle originates from two locations: the manubrium of the sternum and the clavicle. It travels obliquely across the side of the neck and inserts at the mastoid process of the temporal bone of the skull by a thin aponeurosis.