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

2. Identify the muscles of mastication, their sources of innervation and their major actions in chewing.
Temporalis
Masseter
Medial Pterygoid
Buccinator*
Lateral Pterygoid
* Innervated by Facial Nerve
Temporomandibular eminence
Articular disc
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.

3. Follow the course of the major nerves supplying structures and passing through the infratemporal fossa.
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.

4. Innervation of the Lacrimal Gland
Greater petrosal
N. of pterygoid canal V2 V1 V2
Facial
Deep petrosal V3
Pterygopalatine gang.
Sup. Cervical gang.
Internal carotid a.

5. 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
Middle
Meningeal
Septal brr.
Descending palatine
Greater palatine
Lesser palatine
Sphenopalatine V3

6. 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.
Frontal sinus
Spheno-ethmoid recess
Sup. meatus
Sup. Concha
Sphenoidal sinus
Middle Concha
Ethmoid bulla of Middle meatus
Inf. Concha
Opening to Maxillary Sinus
Inf. meatus
Sup. Concha

7. 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.
Palatoglossus
Palatopharyngeus
Hard Palate
Styloglossus
Stylopharyngeus
Stylohyoid
Mandible (cut)
Levator veli palatini
Tensor veli palatini
Genioglossus
Geniohyoid
Hyoglossus
Mylohyoid (cut)
Sup. Constrictor
Hyoid Bone
Palatoglossus V3 IX
XII
Pharyngeal plexus
VII
Palatopharyngeus