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Anatomy Written 2 > Parotid and Infratemporal Regions > Flashcards

Parotid and Infratemporal Regions Flashcards

1
Q

Parotid Duct

A

Transversely passes over Masseter then through Buccinator

Opens into Oral Vestibule opposite 2nd maxillary molar tooth

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2
Q

Parotid Gland Innervation

A 
Secretomotor Innervation
Parasympathetic innervation from CN IX
Sensory Innervation 
- Great auricular nerve (cervical plexus)
- Auriculotemporal nerve (V3)
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3
Q

Parotid Gland Innervation - Parasympathetic

A

Preganglionic fibers emerge from foramen ovale from lesser petrosal nerve
Synapse at Otic Ganglion
Postganglionic fiber hitch ride from auriculotemporal nerve to arrive at parotid gland

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4
Q

Strucures within the Parotid Gland

A 
Lymph nodes
Facial nerve and branches
External Carotid Artery
Retromandibular Vein
Great Auricular Nerve (C2,3)
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5
Q

Temporal Region

A

Temporal Fossa

Infratemporal Fossa

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6
Q

Temporal Region - Temporal Fossa Boundaries and Muscles

A

Posteriorly and Superiorly = Temporal lines
Anteriorly = Frontal and zygomatic bones
Laterally = Zygomatic arch
Inferiorly = Infratemporal crest
Muscles = Temporalis and Masseter

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7
Q

Temporal Region - Infratemporal Fossa Boundaries

A 
Laterally = Ramus of mandible
Medially = lateral pterygoid plate of sphenoid
Anteriorly = posterior part of maxilla
Posteriorly = tympanic plate, mastoid and styloid process of temporal bone
Superiorly = inferior surface of the greater wing of the sphenoid bone
Inferiorly = medial pterygoid's attachment to the angle of the mandible
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8
Q

Temporal Region - Infratemporal Fossa Contents

A
  1. Temporalis-Inferior part
  2. Lateral and Medial pterygoids
  3. Maxiallary artery and vein
  4. Pterygoid venous plexus
  5. Mandibular division of CN V and branches
  6. Chorda tympani (CN VII)
  7. Otic ganglion
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9
Q

Muscles of Mastication and Innervation

A

Innervated by V3
Temporalis
Masseter
Medial and Lateral Pterygoids

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10
Q

Maxillary Artery

A

Divided into three parts by the lateral pterygoid muscle

Arises posterior to the neck of mandible

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11
Q

Maxillary Artery - Selected Branches

A
  1. Inferior Alveolar
  2. Middle Meningeal
  3. Deep Temporal (ant and post)
  4. Infraorbital
  5. Sphenopalatine
  6. Descending Palatine
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12
Q

Maxillary Artery - Inferior Alveolar Branch

A

Enters the mandibular foramen
Supplies inferior teeth
Emerges out the mental foramen as mental artery

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13
Q

Maxillary Artery - Middle Meningial

A

Enters the foramen spinosum to supply the dura mater

Before it enters the foramen is surrounded by the auriculotemporal nerve

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14
Q

Maxillary Artery - Deep Temporal

A

Ascends deep to the tempoalis muscle

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15
Q

Maxillary Artery - Infraorbital

A

Enters inferior orbital fissure to enter the orbit

Runs in floor of orbit to emerge from infraorbital foramen

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16
Q

Maxillary Artery - Sphenopalatine

A

Enters the superior aspect of the pterygomaxiallary fissure, will enter the nasal cavity via the sphenopalatine foramen

17
Q

Maxillary Artery - Descending Palatine

A

Descends in the palate canal within the pterygomaxillary fissure to the hard palate to branch into greater and lesser palatine arteries

18
Q

Pterygoid Venous Plexus

A

Anastamoses with the cavernous sinus and maxillary vein

19
Q

Trigeminal Nerve - Mandiular Division

A

Motor to 8 muscles MASTMATT (four muscles of mastication and mylohyoid, ant belly of digastric, tensor tympani, tensor veli palatini)
Emerges from cranial vault through foramen ovale
General Sensory Branches

20
Q

Trigeminal Nerve - Mandibular Division - General Sensory Branches

A 
Meningeal branch to dura mater
Buccal nerve (long buccal)
Lingual Nerve
Inferior Alveolar 
Auriculotemporal Nerve
21
Q

Trigeminal Nerve - Mandibular Division - General Sensory Branches - Buccal

A

General sensory to cheek

22
Q

Trigeminal Nerve - Mandibular Division - General Sensory Branches - Lingual

A

General sensory to anterior 2/3 of tongue

Carried in nerve is Chorda Tympani

23
Q

Trigeminal Nerve - Mandibular Division - General Sensory Branches - Inferior Alveolar

A

Enters the mandibular foramen
Gives off nerve to the mylohyoid, motor to mylohyoid and ant belly of digastric
Supplies mandibular teeth and emerges through mental foramen as the mental nerve

24
Q

Trigeminal Nerve - Mandibular Division - General Sensory Branches - Auriculotemporal

A

Sensory to auricle, external auditory meatus, tympanic membrane, parotid gland, TMJ, scalp-anterior to the ear
Carries postganglionic parasympathetic fibers from otic ganglion to parotid ganglion

25
Q

Chorda Tympani

A
  • Leaves facial nerve posterior to middle ear cavity
  • Runs deep to tympanic membrane over malleus
  • Emerges from skull into infratemporal fossa and joins the lingual nerve
  • Conveys taste from anterior 2/3 of tongue
  • Conveys preganglionic parasymp to the submandibular and sublingual glands
26
Q

Otic Ganglion

A

Postganglionic parasympathetic neurons to parotid gland

Just inferior to foramen ovale

27
Q

Temporomandibule Joint

A
  • Modified hinge joint
28
Q

TMJ - Articular Surfaces

A

Head of Mandible

Articular tubercle and mandibular fossa

29
Q

TMJ - Articular Disc

A

Divides joint into an upper cavity (gliding movements; protrusion and retrusion) and a lower cavity (hinge movements; opening and closing)

30
Q

TMJ - Nerve Suply

A

Auriculotemporal Nerve

Masseteric Nerve

31
Q

TMJ - Movements - Elevation

A

Close Mouth
Temporal
Masseter
Medial Pterygoid

32
Q

TMJ - Movements - Depression

A 
Open Mouth 
Lateral Pterygoid
Suprahyoid
Infrahyoid
Gravity is main player though
33
Q

TMJ - Movements - Protrusion

A

Lateral Pterygoig

Masseter with assistance from medial pterygoid

34
Q

TMJ - Movements - Retrusion

A

Temporalis

Massester

35
Q

TMJ - Movements - Lateral Movements

A

Glide and Chew
Temporalis of same side
Pterygoids of opposite side
Masseter

Anatomy Written 2 (11 decks)

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