What is lateral pterygoid plate?

What is lateral pterygoid plate?

The lateral pterygoid plate of the sphenoid (or lateral lamina of pterygoid process) is broad, thin, and everted and forms the lateral part of a horseshoe like process that extends from the inferior aspect of the sphenoid bone, and serves as the origin of the lateral pterygoid muscle, which functions in allowing the …

How many Pterygoid plates are there?

Two pairs of bony plates, the pterygoid processes, arise from the base of each alisphenoid bone. The outer plates are nearly horizontal in position. They extend from the posterior end of the maxillary bone caudad and laterad to the lateral surface of the tympanic bulla.

Which area does the lateral pterygoid insert?

The lateral pterygoid or external pterygoid is a muscle of mastication with two heads….

Lateral pterygoid muscle
Insertion Superior head: anterior side of the condyle. Inferior head: pterygoid fovea
Artery Pterygoid branches of maxillary artery

What artery supplies the medial and lateral pterygoid muscles?

Blood Supply and Lymphatics The medial pterygoid muscle receives vascular supply from the maxillary artery through its pterygoid branches and by the facial artery through its muscular branches.

How do you massage the lateral pterygoid muscle?

Gently squeeze the muscle between the index finger and the thumb. Start with a gentle pressure, and gradually increase the muscle squeeze as tolerated. Teach the patient to self-squeeze the lateral pterygoid muscle for 1 minute several times per day. Relief of the headache, jaw or facial pain is sometimes immediate.

What is the function of the lateral pterygoid?

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.

How do you test the lateral pterygoid muscle?

Attempted palpation of what has been thought to be this structure is commonly done by placing the forefinger, or the little finger, over the buccal area of the maxillary third molar region and exerting pressure in a posterior, superior, and medial direction behind the maxillary tuberosity (Figure 2).

Can you palpate the lateral Pterygoid?

Although dysfunction of the lateral pterygoid muscle could contribute to the pain associated with TMJ disorders, it has been demonstrated through the use of dissections and lateral head radiographs that it is not possible to palpate the lateral pterygoid muscle directly by conventional clinical techniques without …

What does Pterygoid mean?

: of, relating to, or lying in the region of the inferior part of the sphenoid bone of the vertebrate skull. pterygoid. noun.

What is the Pterygoid process?

: a process that extends downward from each side of the sphenoid bone near the union of its body and a greater wing, that consists of the medial and lateral pterygoid plates which are fused above anteriorly and separated below by the pterygoid fissure whose edges articulate with a process of the palatine bone, and that …

Where is the Pterygoid process?

Pterygoid process protrudes down from the junction in the middle of the body as well as greater wing of sphenoid posterior towards the last molar tooth. It splits within medial along with lateral pterygoid plates; the pterygoid fossa divides them from each other. A free posterior border is found in each plate.

What muscles open the jaw?

Muscles that depress the mandible and thus open the jaw include the anterior digastric, mylohyoid, and inferior head of the lateral pterygoid. Jaw-closer muscles consist of the masseter, temporalis, medial pterygoid, and superior head of the lateral pterygoid.

What is the strongest muscle of mastication?

masseter muscle

What four muscles control lower jaw movement?

Key Takeaways

  • The masseter elevates the jaw, closing the mouth.
  • The temporalis elevates and retracts the jaw.
  • The lateral pterygoid is the only muscle of mastication that actively opens the jaw.
  • The medial pterygoid elevates and closes the jaw, contributes to protrusion of the mandible, and assists in mastication.

What is the muscle under the chin called?

46291. Anatomical terms of muscle. The digastric muscle (also digastricus) (named digastric as it has two ‘bellies’) is a small muscle located under the jaw. The term “digastric muscle” refers to this specific muscle.

What is it called when a muscle shrinks?

The term muscle atrophy refers to the loss of muscle tissue. Atrophied muscles appear smaller than normal. Lack of physical activity due to an injury or illness, poor nutrition, genetics, and certain medical conditions can all contribute to muscle atrophy. Muscle atrophy can occur after long periods of inactivity.

What muscle raises the lower lip?


What’s the area between your lower lip and chin called?

Labiomental groove

Is a bipartite muscle with two bellies?

Bipartite muscle consisting of the frontal and occipital bellies connected by the eipcranial aponeurosis. The alternate action of these two muscles pull the scalp forward and backward. Overlies posterior occiput; by pulling on the epicranial aponeurosis, fixes origin of frontal belly.

What is the longest muscle name?



Andrey is a coach, sports writer and editor. He is mainly involved in weightlifting. He also edits and writes articles for the IronSet blog where he shares his experiences. Andrey knows everything from warm-up to hard workout.