H&N Muscles O, I, N Flashcards
O: Zygomatic Arch & Bone
I: Mandibular Angle & Ramus (lateral)
N: Masseteric n. (CN V3)
Masseter
O: Temporal Fossa
I: Coronoid Process
N: Deep Temporal n.
Temporalis
-Contains Superficial & Deep Head
O: Greater Wing of Sphenoid bone (infra temporal fossa)
I: Mandible & TMJ (articular disc)
N: Mandibular n.
Lateral Pterygoid-Superior (upper) head
-Lateral pterygoid n.
O: Lateral Pterygoid Plate (lateral surface)
I: Mandible
N: Mandibular n.
Lateral Pterygoid-Inferior (lower) head
-Lateral pterygoid n.
O: Maxilla (Maxillary tuberosity) & Palatine Bone
I: Pterygoid rugosity on medial surface of mand. angle
N: Mandibular n.
Medial Pterygoid -Superficial (external head)
-Medial pterygoid n.
O: Medial surface of lateral pterygoid plate and pterygoid fossa
I: Pterygoid rugosity on medial surface of mandibular angle
N: Mandibular n.
Medial Pterygoid-Deep (internal head)
-Medial pterygoid n.
Mandible will always deviate to ______side of injury
same
Which muscles of mastication Elevate the Mandible
Medial pterygoid (adducts)
Masseter
Temporalis (Vertical/ant. fibers)
Which muscles put condyle in most Superior & Anterior position
Elevation—Masseter, medial ptery., Temporalis
Vertical (ant) fibers & Horiz. (post) fibers `
Vertical(ant.)–Elevates
Horiz. (post)–Retracts mandible
Bilateral movement of Lateral Pterygoid
Protrudes the Mandible (Pulls Disk Forward)
Unilateral movement of Lateral Pterygoid
Lateral movements of Mandible
