This presentation deals with the inside of the skull (cranial cavity) and description of some separate bones. There is another presentation “Skull - the normas” that describes norma verticalis, occipitalis, lateralis, frontalis and basalis and is necessary to complete the objectives. Objectives  Identify the features of the major bones forming the cranial cavity according to normas and separate bones.  Describe the major sutures.  Describe the structure of the flat bones forming the skull and their blood supply.  Discuss ossification of the skull and the changes that occur during postnatal development.  Locate important bony surface landmarks.

1. Anatomy of the skull (2) Dr. Akram Jaffar Ph.D.

8. The anterior cranial fossa Cribriform plate Orbital plate of frontal bone anterior clinoid process Frontal sinus Posterior clinoid process

15. The hypophyseal fossa anterior Clinoid process posterior Clinoid process Tuberculum sellae Dorsum sellae clivus Sphenoid sinus

21. Sphenoid air sinus

23. Skull, lateral xray Petrous Temporal bone Auricle of ear Coronal suture lambdoid suture Internal Occipital protuberance Anterior Cranial fossa middle Cranial fossa posterior Cranial fossa

29. Some separate bones of the skull

36. The sphenoid bone (anterior aspect) Greater wing Lesser wing Medial pterygoid plate Lateral pterygoid plate Pterygoid process Superior orbital fissure Optic canal Foramen rotundum Pterygoid canal Body septum sinus sinus

38. The sphenoid bone (various projections)

40. Lacrimal bone Lacrimal bone Orbital plate of the ethmoid Anterior lacrimal crest of the frontal process of the maxilla Posterior lacrimal crest lacrimal groove Leading to nasolacrimal duct