Front | Back |
Origin: Alveolar process of maxilla and mandible opposite the molar teeth.
Insertion: Blends into fibers of orbicularis oris. Action: Compresses cheek. |
Buccinator Muscles |
Depressor labii inferioris |
Origin: Mandible between the anterior midline and the mental foramen
Insertion: Skin of lip Action: Depresses lower lip |
Origin: Inferior portion of the orbit
Insertion: Orbicularis oris Action: Elevates upper lip |
Levator labii superioris |
Mentalis |
Origin: Incisive fossa of mandible.
Insertion: Skin of chin. Elevates and protrudes lower lip Action: Elevates and protrudes lower lip |
Origin: Maxilla and mandible.
Insertion: Lips. Action: Compresses, purses lips. |
Orbicularis oris |
Risorius |
Origin: Fascia surrounding parotid salivary gland.
Insertion: Angle of mouth Action: Draws corner of mouth to the side |
Origin: Fascia of the superior thorax between cartilage of second riband acromion of scapula.
Insertion: Mandible and skin of cheek Action: Tenses skin of neck, depresses mandible |
Platysma |
Masseter
|
Origin: Zygomatic arch.
Insertion: Lateral surface and angle of mandibular ramus. Action: Elevates mandible and closes jaws. |
Temporalis
|
Origin: Along temporal lines of skull.
Insertion: Coronoid process of mandible. Action: Elevates mandible and closes jaws. |
Pterygoids
|
Origin: Lateral pterygoid plate.
Insertion: Medial suface of mandibular ramus. Action: Elevates the mandible and closes the jaws, or moves mandible side to side. |
Medial Pterygoids
|
Origin: Lateral pterygoid plate and adjacent portion of palatine bone and maxilla.
Insertion: Medial suface of mandibular ramus. Action: Elevates the mandible and closes the jaws, or moves mandible side to side. |
Lateral Pterygoids
|
Origin: Lateral pterygoid plate and greater wing sphenoid.
Insertion: Anterior part of the neck of the Mandible condyle. Action: Opens jaws, protrudes mandible, or moves madible side to side. |
Genioglossus
|
Origin: Medial surface of mandible around chin.
Insertion: Body of tongue, hyoid bone. Action: Depresses and protracts tongue. |
Hyoglossus
|
Origin: Body and greater horn of hyoid bone.
Insertion: Side of tongue. Action: Depresses and retracts tongue. |
Palatoglossus
|
Origin: Anterior surface of soft palate.
Insertion: Side of tongue. Action: Elevates tongue, depresses soft palate. |