What is pterygoid Lamina?
What is pterygoid Lamina?
Either of two plates, the internal and external, that make up the pterygoid process of the sphenoid bone. They are areas of attachment for the muscles of mastication. See also: lamina.
What attaches to medial pterygoid plate?
Its lateral surface forms part of the medial wall of the infratemporal fossa, and gives attachment to the lateral pterygoid muscle; its medial surface forms part of the pterygoid fossa, and gives attachment to the medial pterygoid muscle….
| Lateral pterygoid plate | |
|---|---|
| TA2 | 628 |
| FMA | 54682 |
| Anatomical terms of bone |
What does the medial pterygoid do?
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.
What is the origin of medial pterygoid?
Medial pterygoid muscle
| Origin | Superficial part: Tuberosity of maxilla, Pyramidal process of palatine bone; Deep part: Medial surface of lateral pterygoid plate of sphenoid bone |
|---|---|
| Insertion | Medial surface of ramus and angle of mandible |
What Innervates the medial pterygoid muscle?
Nerve supply The medial pterygoid muscle is supplied by the medial pterygoid nerve, a branch of the mandibular nerve, itself a branch of the trigeminal nerve (V). This also supplies the tensor tympani muscle and the tensor veli palatini muscle.
What movements do the medial and lateral Pterygoids perform?
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 medial pterygoid muscle?
The medial and lateral pterygoid muscles are difficult to palpate, and therefore, assessment is carried out using intra-oral palpation (see Fig. 2.1).
What is the bat shaped bone called?
The sphenoid bone is one of the seven bones that articulate to form the orbit. Its shape somewhat resembles that of a butterfly or bat with its wings extended.
What is sphenoid bone in anatomy?
The sphenoid is just one of the twenty-two bones that form the skull and essentially helps to connect the neurocranium to the facial skeleton. It is a single bone in the midline of the cranial cavity situated posterior to the frontal bone but anterior to the occipital.
What is the origin of the medial pterygoid?
Origin and insertion Medial pterygoid muscle consists of two heads; superficial and deep, that are separated by the inferior head of lateral pterygoid muscle at their origin. The deep part forms the bulk of the muscle and arises from the medial surface of the lateral pterygoid plate of sphenoid bone.
What is the action of the lateral pterygoid?
Action: Elevates mandible, closes jaw, helps lateral pterygoids in moving the jaw from side to side The medial pterygoid is a thick, quadrilateral muscle.
What is the musculus pterygoideus medialis?
Musculus pterygoideus medialis (Musculus pterygoideus internus) Medial pterygoid is a thick quadrilateral muscle that connects the mandible with maxilla, sphenoid and palatine bones. It belongs to the group of masticatory muscles, along with the lateral pterygoid, masseter and temporal muscles . Medial pterygoid muscle consists
What separates the medial pterygoid muscle from the superior pharyngeal constrictor?
The latter two muscles separate the medial pterygoid muscle from the superior pharyngeal constrictor. Near its insertion, the medial pterygoid muscle is medially related to the lateral surface of the submandibular gland, and the facial artery, which descends between these two structures.