Ppt on contents of infratemporal fossa grp 1

The PowerPoint presentation contains information about infratemporal fossa, it's boundaries content and clinical anatomy

1. Infratemporal fossa Maxillary artery and its branches Presented by Group 1 Roll no. -1-12 Moderator – Dr. Shelja Sharma

2. INFRATEMPORAL FOSSA The infratemporal fossa is the space beneath the base of the skull, between the side wall of the pharynx and ramus of the mandible .

3. Boundaries 3

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5. Communications 5 Above with temporal fossa W ith middle cranial fossa Below C ontinous with the tissue space Anteromedially with pterygopalatine fossa

6. Contents Muscles L ateral pterygoid M edial pterydoid T endon of temporalis Blood vessels Maxillary artery Maxillary vein Pterygoid venous plexus Neural Structures Mandibular nerve Chorda tympani nerve Otic ganglion 6

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8. Maxillary artery 8 Course

9. Parts and relations First Part (mandibular part) From beginning to lower border of lateral pterygoid. Second Part (Pterygoid part) From lower border to the upper border of the lower head of lateral pterygoid . 9 Third Part (pterygopalatine part) From upper border of the lower head of lateral pterygoid to pterygopalatine fossa

10. Branches 10

11. From first part of maxillary artery Deep Auricular artery supply Skin of external acoustic meatus Outer surface of tympanic membrane Anterior tympanic artery supply I nner surface of the tympanic membrane Middle meningeal artery supply M eninges S kull bonde 11

12. Contd. Accessory meningeal artery supply meninges Structures in infratemporal fossa Inferior Alveolar artery 12 Incisive branch supply Canine incisor Mental artery supply Skin of the chin

13. From second part of maxillary artery 13 Arteries Supplies 1. Deep temporal artery Temporalis muscle 2. Pterygoid branches Medial and lateral pterygoid 3.Masseteric artery Masseter muscle 4. Buccal artery Buccinator muscle

14. From third part of maxillary artery 14 Artery Supplies 1. Posterior superior alveolar artery Molar and premolar teeth Mucous membrane of maxillary air sinus 2.Infraorbital artery Lacrimal sac Medial angle of eye Side of nose Upper lip 3. Greater palatine artery gives off branch Lesser palatine artery Roof of the mouth Adjoining gums i ) Soft palate ii)Tonsil

15. Contd. 15 Artery Supply 4.Pharyngeal artery a)Mucous membrane of nasopharynx b)Auditory tube c)Sphenoidal air sinus 5.Artery to pterygoid canal Pharynx Auditory tube Tympanic cavity 6.Sphenopalatine artery a.posterior lateral nasal b. posterior septal Lateral wall of nose Sphenoidal and ethmoidal air sinus

16. Maxillary Vein 16

17. Pterygoid venous plexus 17 Communications: With inferior ophthalmic vein via inferior orbital fissure With cavernous sinus by emissary vein via foramen ovale or foramen of Vesalius with facial vein through the deep facial vein

18. CLINICALS 18 Pterygoid plexus provides a route of infection from dangerous area of face into the cavernous sinus. b) It is a potential site of haematoma when inadvertently penetrated by needle

19. Thank You 19