40. Parotid Gland and Temporal Region Flashcards
What cells are in the parotid gland?
Serous acini
What ligament is an extension of the fibrous capsule of the parotid gland?
Stylomandibular ligament
What does the parotid duct pierce when entering the oral cavity?
Buccal fat pad
Buccinator
Branches of facial nerve? (6)
Temporal Zygomatic Buccal Marginal mandibular Cervical Posterior auricular
What artery does the transverse facial artery branch from?
Superficial temporal
What does the external carotid artery divide into when in the parotid gland?
Superficial temporal artery
Maxillary artery
What veins make up the retromandibular vein?
Superficial temporal vein
Maxillary vein
Parasympathetic secretomotor supply of parotid gland?
Glossopharyngeal nerve (CN IX)
What are the 4 muscles of mastication?
Temporalis
Masseter
Medial pterygoid
Lateral pterygoid
Innervation of muscles of mastication?
Mandibular division of trigeminal CN V3
Movements of the mandible?
Elevation Depression Protrusion Retrusion Lateral sliding
Origin of temporalis?
Temporal fossa
Temporal fascia
Insertion of temporalis?
Coronoid process
Anterior border of the ramus of mandible
Action of temporalis?
Anterior and superior fibres - elevate mandible
Posterior fibres - retract mandible
Innervation of temporalis?
Deep temporal nerves (x2) from anterior division of mandibular division of trigeminal nerve
Origin of masseter?
Zygomatic arch
Insertion of masseter?
Lateral aspect of ramus of mandible
Action of masseter?
Elevate mandible
Innervation of masseter?
Masseteric nerve from anterior division of CNV3
Origin of lateral pterygoid?
Upper - infratemporal surface of greater wing of sphenoid
Lower - lateral surface of lateral pterygoid plate
Insertion of lateral pterygoid?
Neck of mandible and articular disc
Action of lateral pterygoid?
Pulls neck of mandible forwards with articular disc (protrusion = both)
Help in lateral chewing with medial pterygoid
Innervation of lateral pterygoid?
Anterior division of CNV3
Origin of medial pterygoid?
Superficial - tubercle of maxilla
Deep - medial surface of lateral pterygoid plate
Insertion of medial pterygoid?
Medial surface of angle of mandible
Action of medial pterygoid?
Assists in elevation
Innervation of medial pteryhoid?
Nerve to medial pterygoid from the main trunk of the mandibular division of the trigeminal nerve (CNV3)
Make sure you can describe the movements of the mandible
Slide 15
Pre-division branches of mandibular division of trigeminal nerve?
Meningeal
Nerve to medial pterygoid (also tensor tympani and tensor veli palatini)
Anterior division of mandibular division of trigeminal nerve?
Masseteric nerve
Nerve to lateral pterygoid
x2 deep temporal
Buccal
Posterior division of mandibular division of trigeminal nerve?
Auriculotemporal
Lingual
Inferior alveolar
Mylohyoid
What do the R and L common carotid arteries arise from?
R - from brachiocephalic
L - from aortic arch
Posterior branches of ECA?
Occipital
Posterior auricular
Ascending pharyngeal (from ‘deep’ surface of carotid)
Anterior branches of ECA?
Superior thyroid Lingual Facial Maxillary Superficial temporal
Terminal branches of ECA?
Superficial temporal
Maxillary
Lymphatics of face and neck
Slide 24
