Parotid Gland And Temporal Region Flashcards
What is the parotid gland
A salivary gland with serous acini only
What covers the parotid
Connective tissue capsule and a dense fibrous capsule that extends as the stylomandibular ligament
Where are the ducts from the parotid gland
Just below the zygomatic arch
Where does the parotid gland pierce
The buccal fat pad and buccinator
Where does the parotid gland ducts enter the oral cavity
At the upper second molar
What are the main branches of the facial nerve
Temporal, zygomatic, buccal, marginal mandibular, cervical and posterior auricular
What vessels are found within the face
Superficial temporal vessels, auriculotemporal nerve, posterior auricular vein and artery, facial vein and artery, and the transverse facial artery
What are the four muscles of mastication
Masseter, temporalis, medial pytergoid and lateral pterygoid
What innervates the muscles of mastication
The mandibular division of the trigmeninal nerve
What are the movements of the mandible
Elevation, depression, protrusion, retrustion and lateral sliding
How does depression of the mandible occur
Through gravity or against force using the supra-hyoid muscles
What covers temporalis
A temporal fascia
Attachment of temporalis
Temporal fossa and fascia
Insertion of temporalis
Coronoid process and anterior body of the ramus of the mandible
Function of temporalis
Anterior and superior fibres - elevate the mandible
Posterior fibres - retract the mandible
Innervation of temporalis
Deep temporal nerves from the anterior division of the mandibular division of the trigeminal
Attachment of masseter
Zygomatic arch
Insertion of masseter
Lateral aspect of the ramus of the mandible
Function of masseter
Elevates the mandible
Innervation of masseter
Masseteric nerve from the anterior division of the mandivular division of the trigeminal
Attachment of the lateral pytergoid
Upper head - infratemporal surface of the greater wing of the sphenoid
Lower head - lateral surface of the pyteroid plate
Insertion of the lateral pytergoid
Neck of the mandible and articular discs
Function of the lateral pytergoid
Pulling the neck forward with the articular disc and in lateral chewing along with the medial pytergoid
Innervation of the lateral pytergoid
Nerve to lateral pytergoid (from anterior division of mandibular division of the trigmenial)
Attachment of the medial pytergoid
Superficial head - tubercle of the maxilla
Deep head - medial surface of the lateral pytergoid plate
Insertion of the medial pytergoid
Medial surface of the angle of the mandible
Function of the medial pytergoid
Assists in elevation
Innervation of the medial pytergoid
Nerve to medial pytergoid from the main trunk of the mandibular division of the trigeminal
What does elevation of the mandible involve
The head of the mandible and discs moving backwards and the head rotates on the lower surface of the disc
TEMPORALIS, MASSETER AND MEDIAL PYTERGOID
What is involved in depression of the mandible
The head of the mandible rotates on the under surface of the articular disc and the mandible is pulled forward
LATERAL PYTERGOID, DIGASTRIC, GENIOHYOID, MYLOHYOID AND GRAVITY
What is involved in protrusion of the mandible
The articular disc and head of the mandible move forward
LATERAL PYTERGOID
What is involved in retrusion
The articular disc and head of the mandible are pulled backwards into the mandibular fossa
POSTERIOR FIBRES OF TEMPORALIS
What is lateral chewing
Combination of protrusion and retraction
PYTERGOIDS
Where does the nerve to medial pytergoid pass through
The otic ganglion
What does the nerve to medial pytergoid join with
Tensor veli palatine and tensor tympani
What does the auriculotemporal nerve carry
Postganglionic parasympathetic fibres from the otic ganglion
What joins the lingual nerve
Chorda tympani carrying parasympathetic fibres from the facial nerve to the submandibular and sublingual glands
What are the terminal branches of the external carotid
The maxillary and superficial temporal
What are the posterior branches of the external carotid
Occipital, posterior auricular and ascending pharyngeal
What does the occipital supply
The back of the scalp
What does the posterior auricular supply
The scalp
What does the ascending pharyngeal give branches to
The pharnyx
What are the anterior branches of the external carotid
Superior thyroid, lingual and facial
What does the superior thyroid give branches to
SCM and the superior laryngeal artery
What does the lingual artery supply
The oral cavity
Where is the facial nerve found
Above the greater Cornu and passes deep to the posterior belly of digastric
What are the branches of the facial artery
Superior and inferior labial, and angular arteries
What does the superficial temporal supply
Skin over the frontal and temporal regions
What does the maxillary artery supply
Muscles of mastication, tympanic membrane, upper and lower teeth, palate, nasal cavity, nasopharynx and the meninges