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What is the action of the lateral pterygoid muscle?
The Lateral pterygoid muscle is active during mastication and during mandibular movements such as protrusion (forward movement of the mandible), abduction (depression of the mandible), mediotrusion (movement of the mandibular condyle towards the midline), and particularly during speaking, singing, and clenching.
What happens when the lateral pterygoid contracts?
Lateral pterygoid is a two-headed, fan-shaped muscle located in the infratemporal fossa of the skull. Lateral pterygoid contributes to this function by protruding and depressing the mandible when contracting bilaterally, and by rotating the mandible when contracting unilaterally. …
Which of the following is considered the strongest elevator of the mandible?
The masseter and medial pterygoid muscles serve primarily as sources of closing power with the masseter being the strongest elevator. The two muscles work in parallel and form a common tendinous sling at the lower back part of the ramus and angle of the mandible.
What is the function of the lateral pterygoid plate?
The lateral pterygoid allows the jaw to move in a horizontal direction during mastication (chewing).
Does the lateral pterygoid elevate the mandible?
It receives blood supply from the pterygoid branches of the maxillary artery. The bilateral contraction of this muscle elevates the mandible and closes the mouth. Furthermore, because of the directions of its muscle fibers, this muscle pulls the mandible forward and produces the movement also known as protrusion.
Which muscle S is are responsible for right lateral deviation of the mandible?
Muscles
| Muscles | Actions |
|---|---|
| Lateral pterygoid | Protracts mandible, depresses chin, lateral deviation of mandible |
| Medial pterygoid | Works with masseter to elevate mandible, aids in protrusion, |
| Digastric Stylohyoid Mylohyoid Geniohyoid | Depresses the mandible against resistance when infrahyoid muscles stabilize or depress hyoid bone |
What muscles do lateral deviation of the mandible?
What movements do the medial and lateral pterygoid muscles perform?
Function. The medial pterygoid muscle functions to assist with elevation and protrusion of the mandible. It also assists the lateral pterygoid muscle with side to side mandibular motion to help with the grinding of food.
Can you palpate the lateral pterygoid?
The lateral pterygoid muscle is inevitably quite tender in most individuals with TMJ issues or bruxism. To palpate, place the index finger inside the mouth. Apply pressure in a cranial direction just underneath the zygomatic arch.
What muscle elevates the mandible?
the masseter muscle
The function of the masseter muscle is to elevate the mandible and approximate the teeth—additionally, the intermediate and deep muscle fibers of the masseter function to retract the mandible.
What muscles attach to lateral pterygoid plate?
Musculotendinous
- lateral pterygoid muscle: the lower part of the lateral pterygoid is attached to the lateral aspect of the lateral pterygoid plate.
- medial pterygoid muscle: medial aspect of the lateral pterygoid plate.
- superior pharyngeal constrictor: inferior end of the medial pterygoid plate.
Which muscle S is are responsible for right lateral deviation of the mandible quizlet?
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