Bones Of Head & Neck 1 Prof. Dr. Motaz Shieban Oncology Surgeon, General Surgeon Teacher of Anatomy & Surgery.

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Presentation transcript:

Bones Of Head & Neck 1 Prof. Dr. Motaz Shieban Oncology Surgeon, General Surgeon Teacher of Anatomy & Surgery

Sutures o Sutures – Immovable joints that join skull bones together o Form boundaries between skull bones o Four sutures: o Coronal – between parietal and frontal o Sagittal– between parietal bones o Lambdoid – between the parietal and occipital o Squamous – between the parietal and temporal Fontanels – usually ossify by 2 years of age

Frontal (Coronal) Sagittal Squamous Lambdoid Sutures

skull = 22 bones cranium = 8 bones: frontal, occipital, 2 temporals, 2 parietals, sphenoid and ethmoid facial bones = 14 bones: nasals, maxillae, zygomatics, mandible, lacrimals, palatines, inferior nasal conchae, vomer. skull forms a larger cranial cavity -also forms the nasal cavity, the orbits, paranasal sinuses mandible and auditory ossicles are the only movable skull bones cranial bones also: attach to membranes called meninges -stabilize positions of the brain, blood vessels -outer surface provides large areas for muscle attachment that move the head or provide facial expressions The Adult Skull

Frontal Parietal Temporal Zygoma Nasal Vomer Maxilla Mandible Frontal View

Frontal Nasal Zygoma Maxilla Mandible Parietal Sphenoid Temporal Occipital External Auditory Meatus Mastoid Process Lateral View

14 Facial Bones Nasal (2) Maxillae (2) Zygomatic (2) Mandible (1) Lacrimal (2) Palatine (2) Inferior nasal conchae (2) Vomer (1)

Sectional Anatomy of the Skull

Paranasal Sinuses o part of the nasal complex o Paired cavities in ethmoid, sphenoid, frontal and maxillary o Lined with mucous membranes and open into nasal cavity though openings called ostia o Resonating chambers for voice, lighten the skull o Sinusitis is inflammation of the membrane (allergy) o infection can easily spread from one sinus to the other through the nasal cavity o can also spread to other tissues frontal sinuses frontal sinuses sphenoid sinuses sphenoid sinuses ethmoid sinuses ethmoid sinuses maxillary maxillary

Major cavities of Skull 11

Views of the Skull and Landmark Features 12

Views of the Skull and Landmark Features 13

Views of the Skull and Landmark Features 14

Anterior View of the Skull 15

Anterior View of the Skull 16

Superior View of the Skull 17

Posterior View of the Skull 18

Lateral View of the Skull 19

Sagittal Section 20

Inferior View of the Skull 21

Superior View of the Skull 22

Craniosynostosis 23

Passageways within The Skull 24

Passageways within The Skull 25