Temporal and Infratemoral fossa+TMJ Flashcards by Omar Gazar

بسم الله الرحمن الرحيم وبه نستعين
___________________
Temopral fossa is shallow arch in the —-side of skull separated from the infratemproal fossa by———–

Lateral side
Zygomatic arch

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Boundaries of Temporal fossa ?

Superior : superior temporal line
Inferior :Zygomatic Arch
Anterior : zygomatic process of frontal + frontal process of zygoma
lateral: Temopral Fascia
Medial : Frontal + temporal+ Parital+ Greater wing of sphenoid at pterion

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Mention contents of Tempral fossa

Muscles : Temporalis
__________________
Nerves :ZAD TEMPORAL
Zygomaticotempral deep
Auriclotempral superficeal
Deep Temopral nerve FROM mandibular nerve
________________
Arteries :
Superficial temoral art Of ECA
Middle temoral artery from above
Deep temoral artery from Maxillary of ECA

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Infratemporal fossa is situated ….and……. to zygomatic arch

Below and medial

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Infratemopral fossa between
……..laterally and …..medially

ramus of mandible laterally
Lateral of Pharynx medilally

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Boundarires of infratempral fossa

=Superiorly : greater wing of sphenoid
anterior post Maxilla
=Post: syloid process
=Medially: lateral pterygoid plate + lateral wall of pharynx
=Laterally: Ramus of Mandible

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Mention connections of Infratemoral fossa

1-Temopral via zygmotaic arch
2-Oribt via Inferior Orbital fissure
3-Pterygopalatine fossa via pterygomaxillary fissure
4-Middle cranial fossa via foramne ovale+ Spinosum

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Mention Contents of Infratemporal fossa

Muscles :
Lateral and medial pterygoid muscles of mastications + tensor palatine
_________________
Nerves: MOC
Mandibular and branches
Otic ganglion
Chorda Tympani
________________
Vessels:
Maxillart artery first and second parts giving middle and accessory meingeal artires
Pterygoid venous pleux
_________________
Ligament SphenoMandibular Ligamnet

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Muscles of Mastications

Tempralis
Medial and lateral Pterygpoid
Masseter
4 Muscles for mastication

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Common characteristic of muscle of mastications ?

From first Phayngeal arch
Supplied by Mandibular Nerve
Arise from skull
inserted into Mandible
Controlloing TMJ

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Mention general actions of mastications
?

Depression
Elevation
Protraction
Retraction

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The only muscle retract mandiblre>?

Posteror horizontal Termporalis

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Describe Temporlias muscle

Origiate from floor of temoral fossa and deep fascia
Inserted into the coronoid process except lateral surfaces externds to anterior ramus till last molar
_________________
Nerve supply : anterior division of Mandibular Nerve
________________
Actions :
Anterior Vertical for ?
Elevation of mandible
Posterior Horizontal for ?
Retracion of Mandible

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Describe masseter

Originate :
Superficial head : from the ant 2/3 of the lower border of zygomatic arch
Deep head from the post 1/3 and inner surface of lower border of zygomatic arch
to be inserted into
lateral surface of ramus of mandible
_______________
Supplied by anterior Division of Mandibular Nerve
_________________
actions
Deep vertical for elevations
Sueprficial oblique Protruction

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Tempralis + masseter +lateral ptergoid supplied by

Anteriro division of mandibular nerve

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lateral Pterygoid + Masseter

Protratcion

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Lateral Pterygoid Describe

Origins:
upper head from the infratemporal surface of the greater wing of Sphenoid
Lower Head from the lateral surface of pterygoif plate
inserted into Fovea + TMJ Capsule
________________
Supplied by anterior division of Mandibular Nerve
__________________
Actions :
1-Depress the madnibel
2-Protrude The mandible
3-side to side movements

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Masseter and Tempralis

Elevation of mandible

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describe medial pterygoid muscles

Originns\
Superficial Head from Maxillary tuberosity
Deep Head from the medial surface of lateral pterygoid plate
to be inserted in the medial surface of Angle of Mandible
_________________
Nerve Supply by Trunk of Mandibular Nerve
_______________
Actions :
Elevations
Protraction
Side to side movemnts with lateral Pterygoid

كلهم يعملوا رفع للفلك السفلي ماعدا ؟

Lateral pterygoid

كلهم يطلعوا الفك لقدام ماعدا ؟

Tempralis
retraction

Type of TMJ ?

sYNOVIAL condylar joint

Artiucluar surfaces of TMJ ?

In mandibular fossa
the articular tubercle of Zygomatic arch + Head of Mandible
=covered by fibrocartilage
Synovial membrane covering fiborus capsule

Articular disc inside TMJ upper surface is ….. but lower is …….. and it is attacahed to ?

Concavo-Convex
Concave
________________
1-Fibrous capsule
2-Tendon of lateral pterygoid

Ligaments supporting TMJ ?

Lateral temporomandibular ligament SphenoMandiublar ligamnet sTYLOMandibular ligament

Lateral tempromandiublar ligament describe

Lateral to fibrous capsle of TMJ Attaced above to the tubcle on the root of zygomatic arch below to the lateral surface of neck of mandible _______________ Functions: Limit posterio movment of Mandible Preventing Head of mandbile disloaction Protecting Ecternal Audiotry meatus

describe shpenomandibular ligament

Medial to TMJ attaced above: spine of sphenoid below : lingula of Mandibular foramne its remenant of First pharyngeal Arch

Stylomandibular ligament

Is is condensation of the investing deep cervical Fascia posterior to TMJ ______________ Attaced aboce to syloid process below to angle of Mandible ___________________

Deep cervical Fascia = Stylomandibular ligamnet separateS ?

Parotid From SubMandiublar Salivary glands

At rest Describe TMJ

The two jaws separated by minimal interval teeth are in occlusal position come into oppistion

Depression describe TMJ

The head of Mandible rotated in lower surface of artiuclar disc The head and articular disc pulled forward by lateral pterygoid ___________________ assisted by: Diagastic mylohyoid Geniohyoid Gravity

During Elevation describe TMJ

Reversed Deprssion The head of mandible and artiuclar disc pulled backwards The head of mandiublar rotates on the lower surface of artiuclar disc done by> Tempralis Deep head of Masseter Medial Pterygoid

describe TMJ during protraction

The head of Mandible and Articular Disc pulled forward as well as lower teeth ______________ Lateral Pterygoid assisted by medial Pterygoid Superficial fibers of masseter

Retratcion done by?

HOrizontal fibers of Temporalis

Elevation done by? dperssion ???

anterioro tempralis deepmasseter Medial pterygid ____________ lateral pterygoid

Protraction ? ________________ Retraction ?

Lateral Pterygoid Superficial fibers of Masseter ____________ posterio horizontal of Temporalis

Dislocation of the joint TMJ mostsly .....why?

anterior due to Lateral temporomanidublar ligamnet + external aduiory meatus posteiro to it

" قل نزله روح القدس من ربك بالحق ليثبت الذين آمنوا وهدي وبشري للمسلمين "

Mention branches of main mandibukar trunk

Nervus spinosus & n. to medial pterygoid passes otic ganglion without relay to supply tensor palati & tensor tympani.

Mention relations of mandibular trunk in infratemporal fossa

med: tensor palati &otic ganglion lateral:lateral pterygoid post: middle menigeal artery

Describe blood & nerve supply of TMJ

superficial tempral + maxillary artery ________________ Auriclotemoral+ Massetric nerve

Spheno-mandibular ligament is attached to…..of mandible, lies….to joint capsule

Lingula of mandibular foramen Medial

Stylo-mandibukar ligament lies ….to joint capsule, it separates ….from…..

Posterior Parotid/submandibular gland

Medial surface of lateral pterygoid is related to:

M, deep head of medial pterygoid & tensor palati A, middle meningeal & maxillary arteries N, mandibukar nerve trunk, otic ganglion & chorda tympani L, spheno-mandibular ligament

Lateral surface of lateral pterygoid is related to:

Ramus of mandible Superficial head of medial ptergoid & tendon of temporalis Maxillary a. & pterygoid venous plexus

Mention the structures passing between 2 heads of lateral pterygoid

Buccal nerve Maxillary artery