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Identify the boundaries of the infratemporal fossa. Boundaries: Lateral=Ramus of Mandible Anterior=Maxilla Medial=Lat. Pterygoid Plate Roof=Sphenoid Temporal.

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Presentation on theme: "Identify the boundaries of the infratemporal fossa. Boundaries: Lateral=Ramus of Mandible Anterior=Maxilla Medial=Lat. Pterygoid Plate Roof=Sphenoid Temporal."— Presentation transcript:

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2 Identify the boundaries of the infratemporal fossa. Boundaries: Lateral=Ramus of Mandible Anterior=Maxilla Medial=Lat. Pterygoid Plate Roof=Sphenoid Temporal Maxilla Parietal Sphenoid Frontal Z Lat. Pterygoid Plate Pterygomaxillary Fissure Infratemporal Fossa Temporal Fossa

3 Identify the muscles of mastication, their sources of innervation and their major actions in chewing. Temporalis Masseter Medial PterygoidBuccinator* Lateral Pterygoid * Innervated by Facial Nerve During jaw opening the mandibular condyle and articular disc glide anteriorly onto the temporomandibular eminence. This is brought about by the action of the superior head of the lateral pterygoid muscle The temporalis, masseter, medial pterygoid and the inferior head of the lateral pterygoid all participate in jaw closing. Side-to-side grinding is produced by cooperative actions of one masseter and the contralateral medial pterygoid. Temporomandibular eminence Articular disc

4 Identify the parotid, submandibular and sublingual salivary glands. Trace the course of their innervation and follow the flow of saliva from each gland to the mouth. Inferior alveolar n. Lingual n. Facial n.. Submandibular ganglion. Otic ganglion. Lesser petrosal n. Chorda tympani Auriculotemporal n. Follow the course of the major nerves supplying structures and passing through the infratemporal fossa.

5 Facial Greater petrosal Pterygopalatine gang. Internal carotid a. Sup. Cervical gang. N. of pterygoid canal Deep petrosal V2V2 V2V2 V3V3 V1V1 Innervation of the Lacrimal Gland

6 Trace the flow of blood through the maxillary artery and its major branches. Trace the flow of blood into the nasal and oral cavities. Ext. Cartotid Inf. Alveolar Post. Sup. Alveolar Maxillary Post. Deep Temporal Ant. Deep Temporal Infra-orbital Ext. Cartotid Post. Deep Temporal Ant. Deep Temporal Middle Meningeal Septal brr. Descending palatine Greater palatine Lesser palatine Sphenopalatine V3V3

7 Trace the flow of air into each of the paranasal sinuses, note the communication with the nasal cavity the relationships of each sinus to the oral, orbital and cranial cavities. Sup. Concha Middle Concha Inf. Concha Sup. Concha Inf. meatus Ethmoid bulla of Middle meatus Spheno-ethmoid recess Sphenoidal sinus Frontal sinus Opening to Maxillary Sinus Sup. meatus

8 Identify the extrinsic and intrinsic muscles of the tongue, their innervation, and actions. Identify the muscles of the soft palate, their innervation and major actions. Mandible (cut) Hard Palate Mylohyoid (cut) Hyoglossus Stylohyoid Hyoid Bone PalatoglossusPalatopharyngeus Stylopharyngeus Genioglossus Styloglossus Geniohyoid Palatopharyngeus Palatoglossus Sup. Constrictor Tensor veli palatini Levator veli palatini V3V3 IX XII Pharyngeal plexus VII


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