Which two muscles are involved in mastication?

Which two muscles are involved in mastication?

The muscles of mastication can be divided into the primary muscles and secondary or accessory muscles.

• The primary muscles include: Masseter. Temporalis. Lateral pterygoid.
• The secondary or accessory muscles are: Buccinator. Suprahyoid muscles (digastric muscle, mylohyoid muscle, and geniohyoid muscle)

Which muscles contribute to the action of chewing?

The muscles of mastication are a group of muscles that consist of the temporalis, masseter, medial pterygoid and lateral pterygoid muscles. The temporalis muscle is situated in the temporal fossa, the masseter muscle in the cheek area, while the medial and lateral pterygoids lie in the infratemporal fossa.

What lies in mandibular fossa?

The mandibular fossa or glenoid fossa is the smooth concave articular surface formed by both the squamous and petrous parts of the temporal bone. It forms the superior articular part of the temporomandibular joint and lodges the condyle of mandible.

What are the muscles of mastication quizlet?

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

What are masseter muscles?

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 Innervates the muscles of mastication?

the trigeminal nerve
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 tongue muscle?

Muscles. The tongue’s intrinsic muscles include the following: The superior longitudinal lingual muscle, which shortens the tongue and curls it upward. The inferior longitudinal lingual muscle, which shortens the tongue and curls it downward. The transverse lingual muscle, which elongates and narrows the tongue.

What muscles do you use when eating?

The main muscles involved in eating and moving your mouth are those that move your jaw bone. These include the buccinator, masseter, temporalis and pterygoid muscles.

Why is it called mandibular fossa?

The mandibular fossa is a curved depression of the skull’s temporal bone. The mandibular fossa is a curved depression of the skull’s temporal bone. There are two of such cavities, with one on each side of the skull, thus making the phrase “mandibular fossae” more appropriate.