The lateral pterygoid is a short, two-headed muscle, located in the infratemporal fossa of the skull. The smaller superior head arises from the infratemporal crest of the greater wing of sphenoid bone, while the larger inferior head arises from the lateral surface of the lateral pterygoid plate.
What muscles attach to lateral pterygoid plate?
Attachments
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 bone has Pterygoid plates?
The pterygoid processes or pterygoid plates are paired posteroinferior projections of the sphenoid bone.
What is the function of the lateral pterygoid?
Function. The primary function of the lateral pterygoid muscle is to pull the head of the condyle out of the mandibular fossa along the articular eminence to protrude the mandible. A concerted effort of the lateral pterygoid muscles helps in lowering the mandible and opening the jaw.
What is the insertion of the lateral pterygoid?
a. Inferior head: lateral surface of lateral pterygoid plate. Insertion: (distal attachments): Condyle of mandible and temporomandibular joint.
What movements do the medial and lateral Pterygoids 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.
How do you inject lateral pterygoid muscle?
The needle is inserted until a hard stop at the lateral pterygoid plate is encountered (approximately 40-45 mm), at which point the needle is retracted to a depth of 30-35 mm, bloodless aspiration is confirmed, and the desired therapeutic injection is performed.
What is a pterygoid?
Definition of pterygoid
(Entry 1 of 2) : of, relating to, or lying in the region of the inferior part of the sphenoid bone of the vertebrate skull.
What is a pterygoid plate fracture?
Classically, pterygoid plate fractures have been associated with fractures of the mid-face and skull base. When isolated pterygoid plate fractures are identified on imaging that only extends to the level of the skull base, other related facial fractures may be missed.
What is the Pterygoid bone?
The pterygoid bone is a flat and thin lamina, united to the medial side of the pterygoid process of the sphenoid bone, and to the perpendicular lamina of the palatine bone. In Men and glires, it constitutes the internal wing of the pterygoid process and merges much more to the other parts in Carnivorous and Glires.
Why is the lateral pterygoid called the peripheral heart?
The pterygoid muscles and other muscles of mastication pump the blood from this plexus and are considered a “peripheral heart”.
Which of the following is an action of the lateral pterygoid?
Lateral Pterygoid. Depresses and protracts mandible to open mouth. Pulls forward cartilage of joint during opening of mouth. Aids in chewing.
