What is the origin of the muscles of mastication?

The four main muscles of mastication originate from the surface of the skull and they attach onto the rami of the mandible at the TMJ. The movement performed by these muscles are elevation, depression, protrusion, retraction, and side to side movement.

What are the 4 muscles of mastication?

Muscles

• Temporalis Muscle.
• Medial Pterygoid.
• Lateral Pterygoid.
• Masseter.
• Accessory Muscles of Mastication.

What are the origins and insertions for the masseter?

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 are the origins insertions and actions of the pterygoid muscles?

Lateral pterygoid muscle

Origin	Superior head: Infratemporal crest of greater wing of sphenoid bone Inferior head: Lateral surface of lateral pterygoid plate of sphenoid bone
Insertion	Superior head: Joint capsule of temporomandibular joint Inferior head: Pterygoid fovea on neck of condyloid process of mandible

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 of the sternocleidomastoid?

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.

What is mastication name two muscles of mastication and their function?

Mandibular division of the trigeminal nerve. There are four classical muscles of mastication. During mastication, three muscles of mastication (musculi masticatorii) are responsible for adduction of the jaw, and one (the lateral pterygoid) helps to abduct it. All four move the jaw laterally.

What is the insertion of masseter?

Ramus of the mandible
Masseter muscle/Insertions

What is the origin of the masseter muscle exercise 11?

The origin of the masseter muscle is the zygomatic arch. The zygomatic arch, also called the cheek bone or zygomatic process, is a bony arch that connects the temporal and zygomatic bones, which are located on the sides of the face/skull.

What is the function of the pterygoid muscles?

The primary function of the pterygoid muscles is to produce movements of the mandible at the temporomandibular joint….Pterygoid muscles.

Definition and function	Muscles of mastication that produce movements of the jaw.
Muscles	Lateral pterygoid, medial pterygoid

What is the origin and insertion of the temporalis muscle?

The temporalis muscle is a thin, fan-shaped muscle situated within the temporal fossa of the skull….Temporal muscle.

Origin	Temporal fossa (up to inferior temporal line), Temporal fascia
Insertion	Apex and medial surface of coronoid process of mandible

What are the insertion and origin of the biceps brachii?

Biceps brachii muscle

Origin	Short head – Apex of the Coracoid process of the scapula Long head – Supraglenoid tubercle of the scapula Mnemonic: ‘You walk Shorter to a street Corner. You ride Longer on a Superhighway’
Insertion	Radial tuberosity of the radius Deep fascia of forearm (insertion of the bicipital aponeurosis)

What are four main muscles of mastication?

There are four muscles of mastication – the masseter, temporalis, medial pterygoid and lateral pterygoid. Embryologically , the muscles of mastication develop from the first pharyngeal arch. Consequently they are innervated by a branch of the trigeminal nerve (CN V), the mandibular nerve.

What is the strongest muscle of mastication?

Anatomical terms of muscle. In human anatomy, the masseter is one of the muscles of mastication. Found only in mammals, it is particularly powerful in herbivores to facilitate chewing of plant matter. The most obvious muscle of mastication is the masseter muscle, since it is the most superficial and one of the strongest.

What are various muscles assisting in mastication?

Muscles of mastication Temporalis muscle. The temporalis muscle is a large, flat muscle that lies within the temporal fossa  of the skull . Masseter muscle. The masseter muscle is a strong, quadrangular muscle that covers the lateral aspect of the ramus of the mandible. Medial pterygoid muscle. Lateral pterygoid muscle.

What muscle is named for its origin and insertion?

An even smaller number of muscles are named after the parts of the body where they start and end — their origin and insertion. The sternocleidomastoid muscle, for example, originates from both the sternum and clavicle (breastbone and collarbone) and inserts into the mastoid bone (just below the ear).