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The skull

The skull. The skull is composed of two parts: 1. Cranium 2. Facial skeleton. Sutures. Anterior. Coronal suture. Frontal. Sagittal suture. Parietal. Lambdoid suture. Occipital. Parietal foramen. Posterior. Norma verticalis (superior view). Bone forming: - Frontal bone

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The skull

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  1. The skull • The skull is composed of two parts: • 1. Cranium • 2. Facial skeleton

  2. Sutures

  3. Anterior Coronal suture Frontal Sagittal suture Parietal Lambdoid suture Occipital Parietal foramen Posterior

  4. Norma verticalis (superior view) • Bone forming: • - Frontal bone • - Parietal bone • - Squamous part of occipital bone

  5. Norma verticalis (cont.) • Sutures seen: • - Coronal suture, • - Sagittal suture, • - Lambdoid suture,

  6. Bregma Ant.fontanell Lambda Post.fontanell

  7. Norma occipitalis (posterior view) • There are the following bones: • - Squamous part of occipital bone. • - Parietal bones, separated from the occipital by the lambdoid suture. • - Mastoid part of temporal bone, on each side of the squamous part of occipital, separated by the occipitomastoid suture.

  8. Parietal Sup.&inf.nuchal lines Occipital Ext.occipital protuberence Ext.occipital crest Mastoid

  9. Norma occipitalis

  10. Frontal Nasal Maxilla Zygomatic bone Supra-orbital foramen Infra-orbital foramen Ant.nasal spine

  11. Norma frontalis (cont.)

  12. Orbit • It is a pyramidal shaped space with its apex directed backwards. • Its base is directed forwards at the orbital openings. • Its long axis is directed forwards and laterally. • It has a roof, a floor, a medial wall and a lateral wall. • - Lacrimal fossa: It is a depression in the anterior and lateral part of the roof. • - Optic canal: It is a foramen in posterior part of the roof.

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