Скачать или смотреть Medial Pterygoid Muscle | Origin | Insertion | Nerve Supply | Actions | Relations

Medial Pterygoid Origin
Superficial head: from tuberosity of maxilla & adjoining bone
Deep head: from medial surface of lateral pterygoid plate & adjoining process of palatine bone
Insertion: roughened area on the medial surface of the angle & adjoining ramus of mandible
Nerve Supply: Nerve to medial pterygoid, a branch from the main trunk of mandibular nerve
Action:
elevation of mandible protrusion of mandible
right medial & right lateral pterygoid moves the chin to left side
RELATIONS OF MEDIAL PTERYGOID
The superficial and deep heads of medial pterygoid enclose the lower head of lateral pterygoid muscle
Superficial Relations
The upper part of the muscle is separated from the lateral pterygoid muscle by:
1. The lateral pterygoid plate
2. The lingual nerve
3. The inferior alveolar nerve.
Lower down the muscle is separated from the ramus of the mandible by
1. the lingual and inferior alveolar nerves,
2. the maxillary artery, and
3. the sphenomandibular ligament.
Deep Relations
The relations are:
1 Tensor veli palatini
2 Superior constrictor of pharynx
3 Styloglossus
4 Stylopharyngeus attached to the styloid process.




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