Flashcards in Parotid Gland and Temporal Region Deck (61)
What extends as stylomandibular ligament?
CT capsule and dense fibrous capsule
Where does the Stylomandibular ligament intervene between?
Parotid and Submandibular salivary gland
What may also be accessory tissue?
Describe the Parotid duct?
Oblique passage and palpable if tense masseter
What is the passage of the parotid duct?
Sharp, medial turn to pierce buccal fat pad and buccinator to enter oral cavity at upper second molar
What does ECA form?
Superficial temporal and maxillary arteries
What is the retromandibular vein?
Union of superficial and temporal and maxillary veins
What is the parotid gland?
Salivary gland that secrets serous acini only
What does the facial gland divide?
Parotid gland into deep and superficial parts
Where is the parasympathetic secertomotor supply come from?
Glossopharyngeal nerve (CN IX)
Where is the postganglionic sympathetic fibres come from?
Plexus around ECA
How many muscles of mastication is there?
What are the muscles of mastication?
Medial pterygoid and lateral pterygoid
What innervates the muscles of mastication?
Mandibular division of trigeminal (CN VIII)
What are the movements of the mandible?
Elevation, Depression, Protrusion, Retrusion and lateral sliding
How is depression caused?
By gravity or against force using supra-hyoid muscles
What covers the temporalis?
Where does the temporal fossa and fascia attach to?
Coronoid process and anterior border of the ramus of the mandible
What elevates the mandible?
Anterior and superior fibres of temporalis
What retracts the mandible?
Posterior fibres fo temporalis
What innervates the temporlais?
Deep temporal nerves from anterior division of mandibular division of trigeminal nerve (CN VIII)
Where does the masseter attach to?
Zygomatic arch to the lateral aspect of the ramus of the mandible
Function of Masseter?
Elevate the mandible
What innervates the Masseter?
Masseteric nerve from anterior division of CN VIII
What is the proximal attachment of the lateral pterygoid?
Upper head: Infratemporal surface of greater wing of sphenoid
Lower head: Lateral surface of the lateral pterygoid plate
What is the distal attachment of the Lateral Pterygoid?
Inserts into neck of mandible and articular disc
What is the functions of the lateral pterygoid?
Pulls neck of mandible forwards with articular disc (protrusion = both)
Helps in lateral chewing movements with medial pterygoid (one side)
What innervates the Lateral Pterygoid?
Nerve to lateral pterygoid of anterior division of CN VIII
What are the proximal attachments of the Medial Pterygoid?
Superficial head: Tubercle of maxilla
Deep head: Medial surface of the lateral pterygoid plate