What are the 4 main muscles of mastication?

What are the 4 main muscles of mastication?


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

What are the 6 muscles of mastication?

Muscles of mastication

  • The primary muscles include: Masseter. Temporalis. Lateral pterygoid. Medial pterygoid.
  • The secondary or accessory muscles are: Buccinator. Suprahyoid muscles (digastric muscle, mylohyoid muscle, and geniohyoid muscle) Infrahyoid muscles (the sternohyoid, sternothyroid, thyrohyoid, and omohyoid muscle)

What Innervates the 4 muscles of mastication?

trigeminal nerve
Innervation. Unlike most of the other facial muscles, which are innervated by the facial nerve (or CN VII), the muscles of mastication are innervated by the trigeminal nerve (or CN V). More specifically, they are innervated by the mandibular branch, or V3. The Mandibular nerve is both sensory and motor.

What is the 5th muscle of mastication?

The lateral pterygoid muscle is innervated by the lateral pterygoid branch of the mandibular nerve and vascularized by the pterygoid branches of the maxillary artery. The function of the lateral pterygoid depends on the degree of its contraction.

What muscle opens jaw?

The masseter muscle provides powerful elevation and protrusion of the mandible by originating from the zygomatic arch and inserting along the angle and lateral surface of the mandible. The temporalis muscle originates from the floor of the temporal fossa and inserts onto the coronoid process of the mandible.

How important is mastication?

Mastication, or chewing your food, is an essential part of the digestive process. Mastication prepares your food for swallowing, helps get the digestive process started, makes it easier to absorb nutrients and helps promote feelings of fullness after eating.

What is mastication of food?

Mastication (chewing), in which food is crushed and mixed with saliva to form a bolus for swallowing, is a complex mechanism involving opening and closing of the jaw, secretion of saliva, and mixing of food with the tongue.

What is the strongest muscle in the human body?

The strongest muscle based on its weight is the masseter. With all muscles of the jaw working together it can close the teeth with a force as great as 55 pounds (25 kilograms) on the incisors or 200 pounds (90.7 kilograms) on the molars.

What is 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 weakest muscle in the body?

The stapedius is the smallest skeletal muscle in the human body. At just over one millimeter in length, its purpose is to stabilize the smallest bone in the body, the stapes or strirrup bone of the middle ear….Stapedius muscle.

TA2 2103
FMA 49027
Anatomical terms of muscle

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