Dissection 11 Flashcards
Where is the Temporomandibular Joint located?
Between the mandibular fossa and the articular process of the mandible
How is an articular disk related to the TMJ?
It divides it into two cavities
Articular Tubercle
The TMJ joint glides forward along this when opening wide
Four main muscles of mastication
- Temporalis
- Masseter
- Lateral Pterygoid
- Medial Pterygoid
What does the temporalis muscle connect to?
Side of head to the coronoid process
Elevates and retracts the mandible
What is the masseter muscle connected to?
Zygomatic arch to ramus and angle of mandible
Powerful elevator of the mandible
What does the medial pterygoid muscle connect to?
Lateral pterygoid plate to angle of the mandible
What does the lateral pterygoid muscle connect to?
Lateral surface of lateral pterygoid plate to articular disk of TMJ
What muscles elevate the jaw?
- Masseter
- Temporalis
- Medial Pterygoid
What muscles depress the jaw?
Lateral Pterygoid
What muscles protract the jaw?
- Masseter
- Lateral Pterygoid
- Medial Pterygoid
What muscles retract the jaw?
Temporalis
What muscles move the jaw side to side?
- Temporalis
- Lateral Pterygoid
- Medial Pterygoid
What pharyngeal arch do the muscles of mastication come from?
First
Innervated by trigeminal nerve
Name the three branches of the trigeminal nerve.
- V1; Ophthalmic division
- V2; Maxillary division
- V3, Mandibular division
Name the primary cutaneous nerve of the head
Trigeminal
Where are the motor cell bodies of the trigeminal nerve?
Branchiomotor column in the brainstem
Where does the mandibular nerve exit the skull?
Foramen ovale
What is the only division of the trigeminal nerve with branchiomotor fibers?
Mandibular nerve
Name the somatosensory branches of V3
- Meningeal
- Auriculotemporal
- Buccal
- Lingual
- Inferior Alveolar
Name the 7 branchiomotor branches of V3
- Medial Pterygoid Nerve
- Lateral Pterygoid Nerve
- Deep Temporal Nerve
- Masseteric Nerve
- Tensor tympani Nerve
- Tensor veli palatini nerve
- Nerve to the mylohyoid
What does the nerve to the mylohyoid innervate?
Mylohyoid and anterior belly of digastric
What three trigeminal nerves travel parallel to each other?
Anterior- Buccal, Lingual, Inferior Alveolar- Posterior
What does the mylohyoid nerve branch off of?
Posterior side of inferior alveolar nerve
What does the auriculotemporal nerve surround?
Middle Meningeal Artery
Only horizontal nerve in infratemporal fossa
Auriculotemporal nerve
Where do the deep temporal nerves run?
Deep surface of the temporalis muscle
What cranial nerves do parasympathetic fibers arise from?
III, VII, and IX
What type of fibers innervate the parotid gland?
Preganglionic parasympathetic fibers of CN IX
Petrosal Nerve
Exits skull via foramen ovale and synapses on the otic ganglion
Preganglionic parasympathetic
What nerve innervates the parotid gland?
Auriculotemporal
Postganglionic parasympathetic
What types of fibers does the auriculotemporal nerve contain?
General somatosensory and postganglionic parasympathetic
What cranial nerve does the chorda tympani belong to?
Facial VII
What fiber types does the chorda tympani have?
Special viscerosensory taste
Preganglionic parasympathetic
Where does the chorda tympani nerve exit the skull
Petrotympanic fissure
What types of fibers innervate the submandibular and sublingual glands?
Postganglionic parasympathetics
What are the major branches of the maxillary artery?
- Middle meningeal to the skull
- Inferior alveolar to mandibular teeth
- Branches to muscles of mastication
