Parotid and Temporal Region Flashcards
Describe the position of the parotid gland
From near EAM towards mandible
Forms a duct, 1 finger breadth below zygomatic arch that crosses anterior to the surface of masseter
What muscle does the parotid duct pierce?
Buccinator
What innervates the parotid gland?
CN IX
What structures pass through the parotid gland?
Facial nerve
- Divides into branches within the gland
What 2 veins form the retromandibular vein?
Superficial temporal + Maxillary
What vein contributes to the external jugular vein?
Retromandibular vein
What does ECA divide into within parotid?
Superficial temporal
Maxillary artery
What is the deepest structure in the parotid gland?
Auriculotemporal nerve
What is auricolotemporal nerve a branch of?
Trigeminal
What branches when CN IX leaves jugular foramen?
Tympanic branch supplies ear
Lesser petrosal
Auriculotemporal carries parasympathetic innervation deep into parotid
Name the muscles of mastication
Temporalis
Masseter
Medial/lateral pterygoid
What is the innervation of the muscles of mastication?
CNV3
Which muscles causes protrusion?
Lateral pterygoid
Medial pterygoid assists
Which muscles cause elevation of mandible?
Temporalis, Masseter, medial pterygoid
Which muscles cause depression of mandible?
Lateral pterygoid, digastric, geniohyoid, mylohyoid
GRAVITY
Which muscles cause retrusion of mandible?
Posterior fibres of temporalis
Which muscles cause lateral chewing and what is this a combination of?
Protrusion and retrusion
Pterygoids
Which divisions of trigeminal are motor/sensory?
CNV1 and 2 = sensory
CNV3 - Motor ans sensory
Where does CNV3 pass through and which division is larger?
Foramen ovale
Posterior
Name the motor branches of anterior division of CNV3
Massereric
N to lateral pterygoid
2x deep temporal nerves
Sensory branch of anterior div CNV3
Buccal
skin of cheeks
Sensory branches of post division CNV3
Auriculotemporal
- Scalp, TMJ, EAM, eardrum
Lingual
Sensory and Motor branches of post division CNV3
Inferior alveolar
- lower teeth skin
- motor to mylohyoid
Anterior branches of ECA?
Superior thyroid
Lingual
Facial
Posterior branches of ECA?
Occipital, PA, Ascending pharyngeal
Which artery passes under posterior belly of digastric to supply posterior triangle?
Occipital
