Muscles of mastication and maxillary artery
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Transcript of Muscles of mastication and maxillary artery
MUSCLES OF MASTICATION AND MAXILLARY ARTERY AND BRANCHES
MUSCLES OF MASTICATION AND MAXILLARY ARTERY AND BRANCHESDR. PRATIK MISTRY
MUSCLES OF MASTICATIONMasseterTemporalisLateral pterygoidMedial pterygoid
MASSETERQuadrilateral muscleOrigin:Insertion:Nerve supply:Action:
TEMPORAL REGION AND TEMPORALIS MUSCLEBoundaries:Contents:Temporalis and its fasciaDeep temporal nerve and vesselsAuriculotemporal nerveSuperficial temporal vessels
TEMPORALIS MUSCLE AND ITS FASCIAFan shapeOrigin:Insertion:Nerve supply:Action:
Temporal fascia
INFRATEMPORAL FOSSABoundariesContents:Lateral & medial pterygoid musclesMaxillary artery and its branchesPterygoid venous plexusMandibular nerve and its branches, chorda tympany nerve, otic ganglion
LATERAL PTERYGOIDKey muscleOrigin:Insertion:Nerve supply:Action:Relations:
MEDIAL PTERYGOIDQuadrilateral muscleOrigin:Insertion:Nerve supply:Action:
TRISMUSSpasm of masseter in the TETANUS .Produce lock jaw
MAXILLARY ARTERYAlso known as internal maxillary arteryOrigin within parotid gland behind the neck of mandibleDivided into 3 parts by lateral pterygoid muscle
1ST PART (MANDIBULAR PART)Between neck & lateral pterygoid muscleRelated above with auriculo-temporal nerveIts branches accompany branches of the mandibular nerve
BRANCHES FROM 1ST PARTFIVE IN NUMBERDeep auricular A.Ant. tympanic A.Middle meningeal A.Accessory meningeal A.Inferior alveolar (dental) A.
MIDDLE MENINGEAL ARTERYLargest meningeal branch & clinically most importantCourse and relations
EXTRADURAL HAEMATOMA (HAEMORRAGE)
2ND PART (PTERYGOID PART)Upward & forwardLie either superficial or deep to the lower head of the lateral pterygoid muscleBranches accompany branches of the mandibular nerve
BRANCHES FROM 2ND PARTFOUR IN NUMBERMUSCULAR BRANCHESDeep temporal A. two in numberPterygoid branchesMasseteric arteryBuccal artery
3RD PART (PTERYGO-PALATINE PART)Enters pterygo-palatine fossa by passing between two heads of lateral pterygoid through pterygo-maxillary fissure and divide into branchesBranches accompany the branches of maxillary nerve
BRANCHES FROM 3RD PARTSIX IN NUMBERPosterior superior alveolar (dental) A.Infra-orbital A.Greater palatine A.Pharyngeal A.Artery of pterygoid canalSpheno-palatine A.
PTERYGOID VENOUS PLEXUSNetwork of veins around and within lateral pterygoidDrained by maxillary veinPeripheral heart to pump stagnant blood by lateral pterygoid contraction
Communicate withInf. Ophthalmic veinCavernous sinus by emissary veinFacial vein
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