What does Pterygoideus mean?
: of, relating to, or lying in the region of the inferior part of the sphenoid bone of the vertebrate skull. pterygoid. noun.
Why is it called pterygoid?
In many mammals it remains as a separate bone called the pterygoid bone. Its name is Greek for “resembling a fin or wing”, from its shape.
What is the medial pterygoid?
Anatomical terms of muscle The medial pterygoid (or internal pterygoid muscle), is a thick, quadrilateral muscle of mastication. The mandibular branch of the fifth cranial nerve, the trigeminal nerve, innervates the medial pterygoid muscle.
What is the function of medial pterygoid muscle?
The function of medial pterygoid, while contracting bilaterally, it produces elevation and protrusion of the mandible, while unilaterally contracted, it produces contralateral excursion (Neumann, 2010; Okeson, 2013). It pulls the ramus of the mandible medially and shifting the mandible toward to the contralateral side.
How do you relax a medial pterygoid muscle?
Open your jaw and slide your finger in to the inner side of that bone . The muscle is right there. Apply mild to moderate pressure and wait for it to relax. Hold until it relaxes.
Where is the medial pterygoid muscle?
The medial pterygoid muscle, a major elevator of the jaw is a square-shaped masticatory muscle, located on the medial aspect of the lower jaw bilaterally. It is also known as internal pterygoid muscle.
Where is pterygoid process?
sphenoid bone
Each pterygoid process projects inferiorly from the junction of the body and greater wing of the sphenoid bone and bifurcates into a medial pterygoid plate and a lateral pterygoid plate. At the inferior tip of the medial pterygoid plate is the small hook-shaped process, the pterygoid hamulus.
Which is the superior muscle, the medial or the lateral pterygoid?
The lateral pterygoid or external pterygoid is a muscle of mastication with two heads. It lies superiorly to the medial pterygoid.
Where is the lateral pterygoid located in the skull?
Lateral pterygoid muscle (Musculus pterygoideus lateralis) Lateral pterygoid is a two-headed, fan-shaped muscle located in the infratemporal fossa of the skull. It is one of the four masticatory muscles, along with the medial pterygoid, temporalis and masseter muscles.
How to know if you have medial pterygoid trismus?
This can cause hemorrhage and the development of medial pterygoid trismus hours to days after the procedure. This manifests with inability to completely open the mouth and significant medial pterygoid muscle pain when attempting to open the mouth beyond the restriction.
How is the medial pterygoid related to the mandible?
Although having different origins, both heads insert on the inner surface of mandible, creating an axis for a strong pull of this bone. Unilateral contraction of medial pterygoid causes rotation of mandible, while bilateral contraction elevates and protrudes it.
