Temporal and Infratemoral fossa+TMJ Flashcards
بسم الله الرحمن الرحيم وبه نستعين
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Temopral fossa is shallow arch in the —-side of skull separated from the infratemproal fossa by———–
Lateral side
Zygomatic arch
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
Mention contents of Tempral fossa
Muscles : Temporalis
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Nerves :ZAD TEMPORAL
Zygomaticotempral deep
Auriclotempral superficeal
Deep Temopral nerve FROM mandibular nerve
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Arteries :
Superficial temoral art Of ECA
Middle temoral artery from above
Deep temoral artery from Maxillary of ECA
Infratemporal fossa is situated ….and……. to zygomatic arch
Below and medial
Infratemopral fossa between
……..laterally and …..medially
ramus of mandible laterally
Lateral of Pharynx medilally
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
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
Mention Contents of Infratemporal fossa
Muscles :
Lateral and medial pterygoid muscles of mastications + tensor palatine
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Nerves: MOC
Mandibular and branches
Otic ganglion
Chorda Tympani
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Vessels:
Maxillart artery first and second parts giving middle and accessory meingeal artires
Pterygoid venous pleux
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Ligament SphenoMandibular Ligamnet
Muscles of Mastications
Tempralis
Medial and lateral Pterygpoid
Masseter
4 Muscles for mastication
Common characteristic of muscle of mastications ?
From first Phayngeal arch
Supplied by Mandibular Nerve
Arise from skull
inserted into Mandible
Controlloing TMJ
Mention general actions of mastications
?
Depression
Elevation
Protraction
Retraction
The only muscle retract mandiblre>?
Posteror horizontal Termporalis
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
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Nerve supply : anterior division of Mandibular Nerve
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Actions :
Anterior Vertical for ?
Elevation of mandible
Posterior Horizontal for ?
Retracion of Mandible
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
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Supplied by anterior Division of Mandibular Nerve
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actions
Deep vertical for elevations
Sueprficial oblique Protruction
Tempralis + masseter +lateral ptergoid supplied by
Anteriro division of mandibular nerve
lateral Pterygoid + Masseter
Protratcion
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
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Supplied by anterior division of Mandibular Nerve
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Actions :
1-Depress the madnibel
2-Protrude The mandible
3-side to side movements
Masseter and Tempralis
Elevation of mandible
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
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Nerve Supply by Trunk of Mandibular Nerve
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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
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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
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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
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Attaced aboce to syloid process
below to angle of Mandible
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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
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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
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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 ?
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Retraction ?
Lateral Pterygoid
Superficial fibers of Masseter
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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
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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
