Styloid process Attachment area for muscles of the tongue and some neck muscles

Styloid process attachment area for muscles of the

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•Styloid process: Attachment area for muscles of the tongue and some neck muscles. Skinny bone, helps with the movement of your tongue, under the ear. •Several important foramina associated with this part of temporal bone: Foramen, carotid canal, internal acoustic meatus. Sphenoid bone •Complex bone; difficult to visualize, articulates with all other cranial bones forms base of middle cranial fossa, contributes to base of anterior cranial fossa. Most of it is not visible, more in the middle of your head. •Central body which contains sphenoid sinuses. •3 projections; -Greater and lesser wings (orbits, MCF and ACF: Anterior cranial fossa). -Pterygoid processes (muscles for shewing). -Optical foramina (canals): For optic nerves, nerves of our eyes. -Superior orbital fissure between greater and lesser wings (cranial nerves for eye movement). •Sphenoid: Most of it is not visible, more in the middle of your head.
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Ethmoid bone •Approximates a cube that lies deep between orbits and nasal cavities. •Cribriform plate forms roof of nasal cavity and floor of anterior cranial fossa; tiny holes (olfactory foramina) transit olfactory nerves. •Perpendicular plate projects inferiorly to contribute to nasal septum. •Crista galli projects superiorly to attach to dura mater of brain. •Lateral masses contain ethmoid sinuses. •Medially are superior and middle nasal conchae. •Laterally are orbital plates: contribute to medial walls of orbits. •The tiny holes are for the passage of nerves for the sense of smell. Major cranial structures •Bones of the adult skull are firmly united by sutures. •4 main sutures that connect the cranial bones. 1) Coronal suture: Frontal bone and 2 parietal bones. 2) Squamous suture: Parietal bone and temporal bone. 3) Lambdoid suture: Occipital bone and 2 parietal bones.
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4) Sagittal suture: 2 parietal bones. •Sutural bones: Tiny irregular bones; can occur within cranial suture additional ossification centres that appeared rapidly during fetal development. Facial bones •14 bones of which mandible and vomer are unpaired. •Paired bones: Maxillae, zygomatic, nasal, lacrimal, palatine and inferior conchae. Mandible •Lower jaw bone: Strongest and largest bone of the face. •Body is horizontal part and contains chin; left and right rami join body at mandibular angle. •Mandibular notch, coronoid process (insertion of temporalis muscle), mandibular condyle, alveolar margin (contains tooth sockets), mandibular foramina (nerves to teeth in lower jaw) and mental foramina (blood vessels and nerves to chin and lower lip). Maxillary bones •Fused medially. •Alveolar margins hold teeth of upper jaw.
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•Palatine processes project posteriorly forming anterior 2/3 of hard palate. •note: Incisive fossa, passage of blood vessels and nerves, frontal processes (goes on the side of the nose) and zygomatic processes (goes laterally of the nose).
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