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Anatomy II Exam 3 > Temporal and Infratemporal Fossae - 17 > Flashcards

Temporal and Infratemporal Fossae - 17 Flashcards

1
Q

Bony Landmarks of the Mandible

A

Ramus, Angle, Body

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2
Q

Temporal Lines

A

Superior: attachment of temporalis fascia

Inferior: attachment of temporalis muscle

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3
Q

Temporal Boundaries

A

Superior/Posterior: inferior temporal line

Anterior: frontal process of zygomatic

Inferior: zygomatic arch

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4
Q

Temporal Floor Contents

A

Floor:

  • greater wing of sphenoid
  • squamous temporal
  • frontal
  • parietal

Contents:

  • temporalis muscle
  • deep temporal nerve and arteries
  • zygomaticofacial nerve
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5
Q

Muscles of Mastication

A

Innervated by mandibular branch of CN V

Masseter, temporalis, lateral pterygoid, medial pterygoid

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6
Q

Masseter

A

O: inferior margin of deep surface of zygomatic bone
I: lateral surface of mandibular ramus and coronoid process
In: CN V
F: Elevates and protracts mandible

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7
Q

Temporalis

A

O: floor of temporal fossa and temporal fascia
I: coronoid process and anterior border of mandibular ramus
In: CN V
F: elevates and retracts mandible

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8
Q

Lateral Pterygoid

A

O: lateral pterygoid plate and greater wing of sphenoid
I: front of neck of mandible, articular disc and TMJ
In: CNV
F: protracts mandible, depresses chin (bilateral); grinding (unilateral)

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9
Q

Medial Pterygoid

A

O: lateral pterygoid plate and maxilla
I: medial surface of mandible near angle
In: CN V
F: elevates, protracts (Bilateral); grinding (unilateral)

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10
Q

Temporomandibular Joint (TMJ)

A

Between head of mandible (condyloid process) and mandibular fossa of temporal bone

Intervening fibrocartilage disc:
•Divides joint into superior and inferior compartments.
•Allows mandible to protract and retract as well as elevate and depress.

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11
Q

Axes

A

Anterior Gliding and Hinge-like rotation

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12
Q

Anterior gliding of TMJ

A

Protraction and retraction; grinding occurs when protraction and retraction of the mandible alternate on the two sides.

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13
Q

Hinge-Like Rotation of TMJ

A

During mandibular depression, head of the mandible and the articular disc move anteriorly until the head lies inferior to the anterior tubercle.

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14
Q

TMJ Ligaments

A

Temporomandibular, Sytlomandibular, Sphenomandibular

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15
Q

Temporomandibular Ligament

A

Base of zygomatic process to mandibular neck

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16
Q

Stylomandibular Ligament

A
  • Styloid process to angle of mandible

* Runs between parotid and submandibular glands

17
Q

Sphenomandibular Ligament

A
  • Sphenoid spine to mandibular lingula
  • Lies medial to TMJ
  • Remnant of Meckel’s cartilage
18
Q

Infratemporal Fossa

A

Communicates with orbit via inferior orbital fissure and with the pterygopalatine fossa via the pterygomaxillaryfissure.

19
Q

Contents of the Infratemporal Fossa

A
  • Mandibular nerve
  • Maxillary artery
  • Medial and lateral pterygoid muscles
  • Lower part of temporalis muscle
  • Chorda tympani nerve
  • Otic ganglion
20
Q

Borders of the Infratemporal Fossa

  • Anterior
  • Superior
  • Medial
  • Lateral
  • Inferior
  • Posterior
A
  • Maxilla
  • greater wing of sphenoid
  • lateral pterygoid plate
  • coronoid process and ramus of mandible
  • contiuous with neck
  • TMJ and styloid process
21
Q

Maxillary Artery (4)

A
  • Terminal branch of external carotid artery
  • Crosses infratemporal fossa and enters the pterygopalatine fossa via the pterygomaxillary fissure.
  • Divided into three parts by lateral pterygoid muscle:
  • Artery may pass superficial or deep to muscle
22
Q

First Branch of MA

A

Origin from external carotid artery to lower margin inferior to lateral pterygoid

  • Deep Auricular
  • Anterior Tympanic
  • Middle Meningeal
  • Accessory Meningeal
  • Inferior Alveolar
23
Q

Second Branch of MA

A

Superficial or deep to inferior lateral pterygoid

Branches to muscles of mastication

Buccal artery

24
Q

Third Branch of MA

A

Lies within pterygopalatine fossa

  • descending palatine
  • artery to pterygoid canal
  • pharyngeal artery
  • sphenopalatine artery
  • infraorbital
  • posterior superior alveolar
25
Q

Deep Auricular

A
  • Lies within parotid gland

* Supplies TMJ, ext. auditory meatus, and outer surface of ear drum

26
Q

Anterior Tympanic

A

Supplies tympanic cavity and inner surface of ear drum

27
Q

Middle Meningeal

A
  • Enters cranial cavity via foramen spinosum

* Supplies skull and dura mater

28
Q

Accessory Meningeal

A
  • Enters cranial cavity via foramen ovale

* Supplies semilunar ganglion (V) and dura mater

29
Q

Inferior Alveolar

A
  • Enters mandibular foramen
  • Supplies lower teeth and gums
  • Passes through mental foramen and becomes mental artery
30
Q

Posterior Superior Alveolar

A
  • Runs with superior alveolar nerve (V2)

* Supplies upper molars and premolars

31
Q

Infraorbital

A
  • Enters orbit via inferior orbital fissure
  • Runs with infraorbital nerve
  • Supplies lower eyelid, side of nose, upper lip, and oral mucosa
  • Gives rise to anterior and middle superior alveolar arteries
32
Q

Descending Palatine

A
  • to soft and hard palates

- terminal branch

33
Q

Artery to Pterygoid Canal

A

to pharynx and auditory tube

34
Q

Sphenopalatine Artery

A

terminal branch

Anatomy II Exam 3 (6 decks)

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